* The state has a Diablo Canyon Independent Safety Committee.

* A Diablo Canyon employee named Jim Zim has a stunningly beautiful series of photos taken in the plant and nearby. "I'm fairly confident that my view on the way to work in the morning is a lot prettier than yours!", he says. Other highlights are found in his prose -- such as his description of what it's like to be one of the workers who spends many hours practicing how to make the most of one or two quick entries into a PWR steam generator bowl. He spent a week in mock-up training for a pair of 30-second jumps in recent outage. Nuclear.com is pleased to think of Jim's page as part of "The Best of the Nuclear Web".

January 7, 2012

* [npp-US-California/San Onofre/Diablo Canyon/antinuclear] Searching for Nukes' 'Plan B', John Geesman, California Current (via Nevada ANP)

January 5, 2012

* [npp-US-Diablo Canyon] Diablo Canyon Cost Recovery Denied, Nick Welsh, Santa Barbara Independent

December 28, 2011

* [npp-Diablo Canyon] Diablo Canyon nuclear power plant reacts to Japan's Fukushima disaster, David Sneed, San Luis Obispo Tribune (via Nevada ANP)

* [npp-Diablo Canyon] Calif. nuclear plant continues safety enhancements for earthquakes, David Sneed, San Luis Obispo Tribune (via NEI email). Note - headline used here is NEI's. The Tribune titled it "Diablo Canyon nuclear power plant reacts to JapanÕs Fukushima disaster | Locals wonder whether plant would be prepared to handle a similar crisis".

December 24, 2011

* [npp-Diablo Canyon] On the faultline frontline for Diablo Canyon, David Sneed, San Luis Obispo Tribune (via Nevada ANP)

Aug 28, 2010

Guide Tube leaks - Reactor Vessel Bottom Mounted Instrumentation - history, and Diablo Canyon practices to prevent

Industry operating experience has provided two events of RV BMI guide tube leakage. In a 1989 event at Turkey Point, transgranular stress corrosion cracking in several BMI guide tubes was found. The cracking occurred above the seal table due to chloride contamination and intermittent wetting. In 2003, boron deposits were found on the South Texas Project's Unit 1 BMI. The cause of this leak was determined to be a result of weld defects on the highly stressed,interface between the Alloy 600 tube and the connecting weld to the pressure vessel. In both events the initiators of stress corrosion cracking (SCC) were due to nonaging related factors.

Westinghouse Technical Bulletin NSID-TB-90-02 recommended that the outside surface of the guide tubes at the seal table would be visually examined each outage. The RV BMI guide tubes are examined under ASME Section XI IWB-2500 item B15.10. DCPP inspection procedures contain acceptance criteria based on the ASME Code. Due to ASME Section Xl Code inspection requirement size limitations, the RV BMI guide tubes are not specified to have any inspections other than normal operating pressure tests in ISI programs. There are-no nondestructive examinations required, as piping of nominal pipe size of one inch and smaller is exempted from volumetric and surface exams by IWB-1220.

PG&E believes the current ISI testing by pressurizing the BMI guide tubes and visual examination is sufficient. PG&E's Water Chemistry Program also maintains the environment to prevent a similar event as Turkey Point. The industry operating experience shows that SCC of the BMI guide tubes was due to nonaging related factors.

Source: PGE letter to NRC, Aug 17, 2010, ML102310039, pdf p. 7

August 9, 2010

Earthquakes and Diablo Canyon: public workshop - Sept 8-9

Earthquakes have been one of the main safety concerns at the Diablo Canyon nuclear plant since the Hosgri Fault was discovered about three miles offshore near the facility. Those concerns increased significantly with the discovery last year of the Shoreline Fault, which is less than a mile offshore.

Seismologists say that the maximum strength of a quake from either fault is magnitude 6.5. Diablo Canyon is designed to withstand a quake of magnitude 7.5.

The lead story in local paper today is about a September 8-9, 2010 public conference on the subject:

The full text of the article is freely available at the Tribune website:
http://www.sanluisobispo.com/2010/08/08/1244213/diablo-canyon-workshop-september.html

Additional information, such as agenda and online registration (open through September 7), is freely available at NRC website:
http://www.nrc.gov/public-involve/conference-symposia/seismic-info-workshop.html

June 30, 2007

New this week from NRC Public Document Room

* [2007-06-29] Diablo Canyon Unit 1, Core Operating Limits Report, Cycle 15 ML071710449 2007-06-11 26 05000275 DPR-080 DCL-07-060 2007-06-11 2007-06-28 A!! Pacific Gas and Electric Company ¨ June 11,2007 James R. Becker Vice President Diablo Canyon Operations and Station Director Diablo Canyon Power Plant P. 0. Box 56 Avila Beach, CA 93424 805.545.3462 Fax

* [2007-06-28] Diablo Canyon, Units 1 and 2 - Supplemental to Decommissioning Funding Report ML071700197 2007-06-13 4 05000275 05000323 OL-DPR-080 OL-DPR-082 DCL-07-028 DCL-07-064 2007-06-13 2007-06-27 W Pacific Gas and Electric Company- John S. Keenan 77 Beale Street, Mailcode B32 Senior Vice President San Francisco, CA 94105 June 13, 2007 Generation & Chief Nuclear Offi

* [2007-06-28] Diablo Canyon, Units 1 and 2, Pressure and Temperature Limits Report, Revision 7 ML071700206 2007-06-08 33 05000275 05000323 DPR-080 DPR-082 DCL-07-061 PTLR-1, Rev 7 2007-06-08 2007-06-27 W Pacific Gas and SElectric Company ¨ Donna Jacobs Diablo Canyon Power Plant Vice President P. 0. Box 56 Nuclear Services Avila Beach, CA 93424 805.545.4600 June 8, 2007 Fax:

* [2007-06-27] Diablo Canyon Power Plant, Unit 1 & 2 - Request for Additional Information Regarding Conversion of the Emergency Action Levels to NEI 99-01 (TAC MD3924 & MD3925) ML071560006 2007-06-19 16 05000275 05000323 DPR-080 DPR-082 TAC MD3924 TAC MD3925 2007-06-19 2007-06-26 June 19, 2007 Mr. John S. Keenan Senior Vice President and CNO Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: DI

June 23, 2007

New this week from NRC Public Document Room

* [2007-06-21] Press Release-IV-07-022 - NRC to Hold Two Public Meetings about the Diablo Canyon Nuclear Plant on June 26 ML071710027 2007-06-20 2 05000275 05000323 Press Release-IV-07-022 2007-06-20 2007-06-20 NRC NEWS U. S. NUCLEAR REGULATORY COMMISSION Office of Public Affairs Region IV 611 Ryan Plaza Drive - Suite 400 Arlington, TX 76011-4005 No. IV-07-022 June 20, 2007 Contact: Victor Dricks E-M

* [2007-06-19] 2007/06/06-Diablo Canyon ISFSI - Notice of Appearance for Tison A. Campbell and Notice of Withdrawal for Margaret J. Bupp ML071590013 2007-06-06 4 07200026 72-26-ISFSI RAS 13729 2007-06-06 2007-06-18 2007-06-06 UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE ATOMIC SAFETY AND LICENSING BOARD In the Matter of ) PACIFIC GAS & ELECTRIC CO. ) Docket No. 72-26-ISFSI ) (Diablo Canyon Power Pl

June 16, 2007

New this week from NRC Public Document Room

* [2007-06-13] SER Compliance with WCAP-16260-P-A "The Spatially Corrected Inverse Count Rate (SCICR) Method for Subcritical Reactivity Measurement" ML071550131 2007-05-23 10 05000275 AW-07-2286 LTR-NRC-07-28 WCAP-16260-P-A 2007-05-23 2007-06-12 OWestinghouse WWestinghouse Electric Company Nuclear Services P.O. Box 355 Pittsburgh, Pennsylvania 15230-0355 USA U.S. Nuclear Regulatory Commission Direct tel: (412) 374-4643 Document

June 9, 2007

New this week from NRC Public Document Room

* [2007-06-07] 2007/05/29-Diablo Canyon ISFSI - Notice of Availability to the Supplement of the EA ML071500037 2007-05-24 6 05000275 05000323 07200026 72-26-ISFSI RAS 13703 2007-05-24 2007-06-06 2007-05-29 ML071500026+ [7590-01-P] NUCLEAR REGULATORY COMMISSION [Docket No. 72-26] Notice of Availability of Supplement to the Environmental Assessment and Draft Finding of No Signifi

* [2007-06-07] 2007/05/29-Diablo Canyon ISFSI - NRC Staff's Supplement to Environmental Assessment and Notice of Appearance for Lisa B. Clark ML071500030 2007-05-29 5 05000275 05000323 07200026 72-26-ISFSI RAS 13703 2007-05-29 2007-06-06 2007-05-29 ML071500026+ UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE COMMISSION In the Matter of ) PACIFIC GAS & ELECTRIC CO. ) Docket No. 72-26-ISFSI ) (Diablo Can

* [2007-06-07] 2007/05/29-Diablo Canyon ISFSI - Supplement to the EA ML071500033 2007-05-29 9 05000275 05000323 07200026 72-26-ISFSI RAS 13703 2007-05-29 2007-06-06 2007-05-29 ML071500026+ U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS DIVISION OF SPENT FUEL STORAGE AND TRANSPORTATION SUPPLEMENT TO THE ENVIRONME

* [2007-06-07] 2007/05/29-Diablo Canyon ISFSI - NRC Staff's Response to Environmental Assessment, Supplement to the EA, and Notice of Availability of the EA ML071500026 2007-06-06 ML071500030+ ML071500033+ ML071500037+ FNWEBNAVIGATE=1.0 SYSTEMTYPE=MEZZANINE DOCUMENTID=071500026 STARTPAGE=1 LIBRARYNAME= ML_adams^hqntad01

June 2, 2007

New this week from NRC Public Document Room

* [2007-05-31] Press Release-07-067: NRC Seeks Public Comment On Supplemental Environmental Assessment For Diablo Canyon Spent Fuel Storage Facility ML071500035 2007-05-29 2 05000275 05000323 Press Release-07-067 2007-05-29 2007-05-30 NRC NEWS U.S. NUCLEAR REGULATORY COMMISSION Office of Public Affairs Telephone: 301/415-8200 Washington, D.C. 20555-0001 E-mail: opa@nrc.gov Web Site: http://www.nrc.gov No. 07-067 May 29, 2007 N

* [2007-05-30] 05/29/2007 - Ltr J S Keenan, Pacific Gas and Electric Co, Draft Supplement to the Environmental Assessment and Updated Finding of No Significant Impact Related to the Construction and Operation of the Diablo Canyon ISFSI (72-26, 50-275, 323) ML071280254 2007-05-29 4 05000275 05000323 07200026 2007-05-29 2007-05-29 ML071270695+ May 29, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: S

* [2007-05-30] Encl 2 - Draft Supplement to the Environmental Assessment for the Diablo Canyon ISFSI ML071280256 2007-05-29 9 05000275 05000323 07200026 2007-05-29 2007-05-29 ML071270695+ Enclosure 1 U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS DIVISION OF SPENT FUEL STORAGE AND TRANSPORTATION SUPPLEMENT TO THE ENVIRONMENTAL ASSESSMENT AND D

* [2007-05-30] FRN - Notice of Availability of Supplement to the Environmental Assessment and Draft Finding of No Significant Impact for the Diablo Canyon Independent Spent Fuel Storage Installation ML071280255 2007-05-24 6 05000275 05000323 07200026 2007-05-24 2007-05-29 ML071270695+ [7590-01-P] NUCLEAR REGULATORY COMMISSION [Docket No. 72-26] Notice of Availability of Supplement to the Environmental Assessment and Draft Finding of No Significant Impact for the Diablo Canyon

* [2007-05-30] 05/29/07 - Ltr J S Keenan, Pacific Gas and Electric Co, Draft Supplement to the Environmental Assessment and Updated Finding of No Significant Impact Related to the Construction and Operation of the Diablo Canyon ISFSI (72-26, 50-275, 323) ML071270695 2007-05-29 ML071280254+ ML071280255+ ML071280256+ FNWEBNAVIGATE=1.0 SYSTEMTYPE=MEZZANINE DOCUMENTID=071270695 STARTPAGE=1 LIBRARYNAME= ML_adams^hqntad01

May 26, 2007

New this week from NRC Public Document Room

* [2007-05-26] Ltr. to John S. Keenan re: Diablo Canyon Power Plant - NRC Material Control and Accounting Program Inspection ML071280119 2007-05-14 4 05000275 05000323 DPR-080 DPR-082 IR-07-201 2007-05-14 2007-05-25 Official Use Only - Security-Related Information Official Use Only - Security-Related Information May 14, 2007 John S. Keenan Senior Vice President - Generation and Chief Nuclear Officer Pac

* [2007-05-22] Diablo Canyon ISFSI Safety Analysis Report - Amendment 1 to Diablo Canyon Independent Spent Fuel Storage Installation Submittal of License Application Amendment 1, Table 4.3-1 - Section 8.2.2 ML022950304 2002-10-15 186 05000275 05000323 07200026 DPR-080 DPR-082 +sispmjr200505 -RFPFR TAC L23399 2002-10-15 2007-05-21 DIABLO CANYON ISFSI SAFETY ANALYSIS REPORT TABLE 4.3-1 IMPORTANT-TO-SAFETY COMPONENTS OF THE CASK TRANSPORTATION SYSTEM Component Function Applicable Design C

* [2007-05-22] MR-4-2007-0003, Partial Loss of Offsite Power at Diablo Canyon ML071340397 2007-05-14 1 05000275 05000323 MR-4-2007-0003 2007-05-14 2007-05-21 Morning Report Date: MAY 14, 2007 PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION IV Licensee/Facility: Notification: 4-2007-0003 05/12/2007 MR Number: PACIFIC GAS & ELECTRIC CO. [1] W-4-LP, [2] W-

* [2007-05-22] Diablo Canyon Independent Spent Fuel Installation License Application, [3:11], Attachment D "Environmental Report." ML020180196 2001-12-21 202 07200026 +sispmjr200505 -nr -RFPFR DIL-01-002 2001-12-21 2007-05-21 DOCKET NO. 72-26 I DIABLO CANYON INDEPENDENT SPENT FUEL STORAGE INSTALLATION ENVIRONMENTAL REPORT PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON ISFSI ENVIRONMENTAL REPORT LIST OF CURRENT

* [2007-05-22] Diablo Canyon Independent Spent Fuel Installation License Application, [4:11], Attachment E "Environmental Report." ML020180173 2001-12-21 122 07200026 +sispmjr200505 -RFPFR 2001-12-21 2007-05-21 6000 '49 / N NNW NW NNE NE ENE E PLANT SITE 6 10 20 ESE 8 30 9 10 SE 40 SSE 50 ENVIRONMENTAL REPORT DIABLO CANYON ISFSI FIGURE 2.2-2 POPULATION DISTRIBUTION 10 TO 50 MILES 2010 PROJECTED 1-0. 0 7 N NNW N

* [2007-05-22] Diablo Canyon Independent Spent Fuel Installation License Application, [6:11], Attachment G1 " Safety Analysis Report." ML071380133 2001-12-21 32 07200026 DIL-01-002 2001-12-21 2007-05-21 0 - . DIABLO CANYON AND ISFSI SITES '0 / ft A L 4 - MI /,cer SAFETY ANALYSIS REPORT DIABLO CANYON ISFSI FIGURE 2.1-1 SITE LOCATION MAP 6:? -N 40 / o0 5 '7 0 5 0 IC 1 -jAx / 23 PROPOSED LEGEND: DISPOSAL SITE I #NO

* [2007-05-22] Diablo Canyon Independent Spent Fuel Installation License Application, [8:11], Attachment H "Safety Analysis Report." ML071380152 2001-12-21 105 07200026 DIL-01-002 2001-12-21 2007-05-21 DOCKET NO. 72-26 'I U1 DIABLO CANYON INDEPENDENT SPENT FUEL STORAGE INSTALLATION SAFETY ANALYSIS REPORT PACIFIC GAS AND ELECTRIC COMPANY I I DIABLO CANYON ISFSI SAFETY ANALYSIS REPORT CHAPTER 4 ISFSI DESIGN CONTENT

May 19, 2007

New this week from NRC Public Document Room

* [2007-05-19] 06/26/2007 Notice of Rescheduled Public Meeting with Pacific Gas and Electric Company to Present NRC Assessment of Plant Safety Performance. ML071370747 2007-05-17 5 05000275 05000323 2007-05-17 2007-05-18 May 17, 2007 RESCHEDULED TO JUNE 26, 2007 SUBJECT: PUBLIC MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY FACILITY: Diablo Canyon Power Plant DOCKETS: 50-275; 50-323 DATE AND TIME: June 5, 2007 June 26, 2007 2:30 p.m.

* [2007-05-19] 6/26/2007, Meeting with Members of Public to Provide Members of the Community an Opportunity to Ask Questions and Provide Comments to the NRC Staff on Issues regarding the Diablo Canyon. ML071370748 2007-05-17 4 05000275 05000323 2007-05-17 2007-05-18 May 17, 2007 RESCHEDULED TO JUNE 26, 2007 SUBJECT: MEETING WITH MEMBERS OF THE PUBLIC FACILITY: Diablo Canyon Power Plant DOCKETS: 50-275; 50-323 DATE AND TIME: June 5, 2007 June 26, 2007 6:30 p.m. (PDT) LOCATION: Em

* [2007-05-19] Diablo Canyon Power Plant, Unit 1, Pressurizer Surge, Spray, Safety, and Relief Nozzle Weld Susceptibility to Primary Water Stress-Corrosion Cracking (TAC MD4149). ML071020370 2007-05-10 4 05000275 DPR-080 TAC MD4149 2007-05-10 2007-05-18 May 10, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Office Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: DIABLO CANYON

* [2007-05-18] Diablo Canyon, Units 1 and 2 - 90-day Response to NRC Generic Letter 2007-01, "Inaccessible or Underground Power Cable Failures that Disable Accident Mitigation Systems or Cause Plant Transients." ML071290050 2007-05-02 7 05000275 05000323 DPR-080 DPR-082 DCL-07-053 GL-07-001 OL-DPR-80 OL-DPR-82 2007-05-02 2007-05-17 Pacific Gas and SElectric Company ¨ Donna Jacobs Diablo Canyon Power Plant Vice President P. 0. Box 56 Nuclear Services Avila Beach, CA 93424 805.545.4600 May

* [2007-05-17] ESLO2007-009, "Diablo Canyon NPDES Receiving Water Monitoring Program: 2006 Annual Report." ML071290115 2007-04-20 125 05000275 05000323 ESLO2007-009 2007-04-20 2007-05-16 ML071290113+ Diablo Canyon Power Plant NPDES Receiving Water Monitoring Program: 2006 Annual Report April 20, 2007 Prepared for: Pacific Gas and Electric Company Diablo Canyon Power Plant Avila Beach, CA

* [2007-05-17] Transmittal of Diablo Canyon Receiving Water Monitoring Program 2006 Annual Report. ML071280374 2007-04-26 3 05000275 05000323 DCL-2007-519 2007-04-26 2007-05-16 ML071290113+ A Pacific Gas and Electric Company Diablo Canyon Power Plant P0. Box 56 Avila Beach, CA 93424 800.545.6000 April 26, 2007 PG&E Letter DCL-2007-519 Certified/Return Receipt #7007-0220-0004-67

* [2007-05-15] Annual Assessment Letter - Diablo Canyon Power Plant (NRC Inspection Report 05000275-07-001 and 05000323-07-001). ML070610597 2007-03-02 9 2007-03-02 2007-05-14

* [2007-05-15] IR 05000275-06-005, 05000323-06-005; 10/1/06 - 12/31/06; Diablo Canyon Power Plant Units 1 and 2; Maintenance Risk Assessments and Emergent Work Control, Problem Identification and Resolution, Operability Evaluations, and Other Activities. ML070440126 2007-02-13 53 2007-02-13 2007-05-14

* [2007-05-15] IR 05000275-06-011; 05000323-06-011; September 11 through October 6, 2006; Diablo Canyon Nuclear Power Plant, Units 1 and 2: NRC Inspection Procedure 71111.21, Component Design Basis Inspection. ML070560003 2007-02-23 24 2007-02-23 2007-05-14

* [2007-05-17] 10/24/03 L Womack, Diablo Canyon Power Plant, Environmental Assessment and Finding of No Significant Impact Related to the Construction and Operation of the Diablo Canyon Independent Spent Fuel Storage Installation (72-26, 50-275, 50-323) (L23399). ML032970337 2007-05-16 ML032970368+ML032970369+ML032970370+ FNWEBNAVIGATE=1.0 SYSTEMTYPE=MEZZANINE DOCUMENTID=032970337 STARTPAGE=1 LIBRARYNAME=ml_adams^hqntad01

* [2007-05-15] Annual Report for 2006 on Discharge Monitoring at Diablo Canyon Power Plant. ML070660578 2007-02-27 39 2007-02-27 2007-05-14

* [2007-05-15] Diablo Canyon - INIT EXAM - 02/2005 - Draft Written Exam Comments. ML051040429 2004-10-25 6 2004-10-25 2007-05-14

* [2007-05-15] Diablo Canyon - Init Exam - 02/2005 - Final Outlines. ML050890250 2005-01-21 27 2005-01-21 2007-05-14

* [2007-05-15] Diablo Canyon - Init Exam - 02/2005 - Operator Licensing Examination Approval. ML050400298 2005-02-07 4 2005-02-07 2007-05-14

* [2007-05-15] Diablo Canyon - Initial - 02/2005 - Draft Written Exam. ML050900295 2004-10-19 110 2004-10-19 2007-05-14

* [2007-05-15] Diablo Canyon - Initial Exam - 02/2005 - Draft Written Outlines and Rejected KA's. ML050890254 2004-10-19 28 2004-10-19 2007-05-14

* [2007-05-15] Diablo Canyon - Initial Exam - 02/2005 - Public Forms. ML061380799 2004-10-06 18 2004-10-06 2007-05-14

* [2007-05-15] Diablo Canyon Power Plant, Unit No. 1 - Review of 2005 Steam Generator Tube Inspection Reports for the 13th Refueling Outage (1R13) (TAC No. MD3761). ML070330548 2007-02-13 3 2007-02-13 2007-05-14

* [2007-05-15] Diablo Canyon Power Plant, Unit No. 1 and 2 - Revised License DPR-080, Page 9 and DPR-082, Pages 6 and 7 (TAC Nos. MD2219 and 2220). ML062980511 2006-12-11 3 2006-12-11 2007-05-14

* [2007-05-15] Diablo Canyon Power Plant, Unit No. 2 - Confirmatory Action Letter Re: Alloy 82/182 Pressurizer Butt Welds (TAC No. MD4150). ML070670425 2007-03-15 5 2007-03-15 2007-05-14

* [2007-05-15] Diablo Canyon Power Plant, Unit Nos. 1 and 2, Relief Request NDE-SBR for the Second 10-Year Interval Inservice Inspection and Examination Program for Snubbers (TAC Nos. MD0535 and MD0536). ML070780369 2007-03-29 5 2007-03-29 2007-05-14

* [2007-05-15] Diablo Canyon Power Plant, Units 1 and 2 - Westinghouse Electric Company Request for Withholding Information from Public Disclosure (CAW-06-2224) (TAC Nos. MD3992 and MD3993). ML070570013 2007-03-01 4 2007-03-01 2007-05-14

* [2007-05-15] Diablo Canyon, Unit 1, Request for Extension of Completion Date for Unit 1 Corrective Actions and Modifications Required by Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at.... ML070660509 2007-02-22 19 2007-02-22 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 & 2, License Amendment, Deletion of License Condition Section 2.G in Facility Operating License (CLIIP Item). ML070440502 2007-03-19 13 2007-03-19 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 & 2, License Amendment, Deletion of License Condition Section 2.G in Facility Operating License (CLIIP Item). ML070440503 2007-03-19 2 2007-03-19 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 & 2, License Amendment, Deletion of License Condition Section 2.G in Facility Operating Licenses (CLIIP Item). ML070440500 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 & 2, Response to NRC Request for Additional Information Regarding ASME Section XI Inservice Inspection Program Relief Requests NDE-SLH U2 and NDE-LSL U2. ML070880743 2007-03-23 4 2007-03-23 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 & 2, Semi-Annual Fitness for Duty Performance Report for Period of July through December 2006. ML070660502 2007-02-23 7 2007-02-23 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 and 2 - Response to NRC Request for Additional Information Regarding ASME Section XI Inservice Inspection Program Relief Request NDE-SBR. ML070780153 2007-03-08 6 2007-03-08 2007-05-14

* [2007-05-15] Diablo Canyon, Units 1 and 2, Additional Commitments Related to Inspection and Mitigation of Alloy 600/82/182 Pressurizer Butt Welds. ML070580128 2007-02-20 6 2007-02-20 2007-05-14

* [2007-05-15] Diablo Canyon-02-2005-Draft - Exam Outline Comments. ML060940694 2005-02-07 1 2005-02-07 2007-05-14

* [2007-05-15] Diablo Canyon-02-2005-Draft Operating Exam Comments. ML060940701 2005-02-07 1 2005-02-07 2007-05-14

* [2007-05-15] Diablo Canyon-02-2005-Draft Operating Exam. ML060940697 2005-02-07 423 2005-02-07 2007-05-14

* [2007-05-15] Diablo Canyon-02-2005-DRAFT-Operating Exam Outline. ML060940685 2005-03-31 4 2005-03-31 2007-05-14

* [2007-05-15] Diablo Canyon-02-2005-Final Operating Exam. ML060940698 2005-02-07 423 2005-02-07 2007-05-14

* [2007-05-15] LER 06-003-00 for Diablo Canyon Unit 2, re Manual Reactor Trip Due to Reactor Coolant Pump High Temperature Indication. ML070470268 2007-02-08 6 2007-02-08 2007-05-14

* [2007-05-15] LER 06-004-00 for Diablo Canyon, Unit 2 Regarding Automatic Reactor Trip due to Circulating Water Pump Surge Capacitor Failure. ML070530312 2007-02-12 6 2007-02-12 2007-05-14

* [2007-05-15] Letter to James R. Becker, Pacific Gas and Electric Company, Diablo Canyon Power Plant, from Jesse L. Funches, CFO, dated March 7, 2007, re: Waiver for fees associated with NRC's review of the Diablo Canyon Power Plant. ML070670150 2007-03-07 3 2007-03-07 2007-05-14

* [2007-05-15] M070226 - Affirmation Session: I. SECY-06-0243 Amergen Energy Oyster Creek; II. SECY-06-0245 Nuclear Management Palisades; III. SECY-06-0246 System Energy Resources ESP Grand Gulf; IV. SECY-07-0006 Pacific Gas & Electric Diablo Canyon ISFSI. ML070580194 2007-02-26 7 2007-02-26 2007-05-14

* [2007-05-15] SRM-M070226-Affirmation: I. SECY-06-0243 Amergen Energy Oyster Creek; II. SECY-06-0245 Nuclear Management Palisades; III. SECY-06-0246 System Energy Resources ESP Grand Gulf; IV. SECY-07-0006 Pacific Gas & Electric Diablo Canyon ISFSI. ML070580085 2007-02-26 2 2007-02-26 2007-05-14

* [2007-05-15] Staff Observations of Diablo Canyon Power Plant Strainer Testing for Generic Safety Issue 191 During December 14-15, 2006, Trip to Continuum Dynamics, Inc. ML070670071 2007-03-23 8 2007-03-23 2007-05-14

May 12, 2007

New this week from NRC Public Document Room

* [2007-05-12] Diablo Canyon, Units 1 and 2 - 2006 Annual Radiological Environmental Operating Report. ML071230098 2007-04-27 139 05000275 05000323 DPR-080 DPR-082 DCL-07-048 2007-04-27 2007-05-11 Pacific Gas and Electric Company' James R. Becker Diablo Canyon Power Plant Vice President P. 0. Box 56 Diablo Canyon Operations and Avila Beach, CA 93424 Station Director 805.545,3462 Fax:

* [2007-05-11] Diablo Canyon Power Plant, Unit No. 2, RAI, Request for Additional Information Regarding 2006 Steam Generator Tube Inspections (TAC No. MD2912). ML071090317 2007-05-02 6 05000323 TAC MD2912 2007-05-02 2007-05-10 May 2, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: DIABLO CANYON POWER PL

* [2007-05-11] Diablo Canyon, Units 1 and 2, 2006 Annual Nonradiological Environmental Operating Report. ML071220086 2007-04-26 7 05000275 05000323 DPR-080 DPR-082 DCL-07-049 2007-04-26 2007-05-10 Pacific Gas and Electric Company' James R. Becker Diablo Canyon Power Plant Vice President P. 0. Box 56 Diablo Canyon Operations and Avila Beach, CA 93424 Station Director 805.545.3462 Apri

* [2007-05-11] Diablo Canyon, Units 1 and 2, 2006 Annual Radioactive Effluent Release Report. ML071220121 2007-04-27 212 05000275 05000323 DPR-080 DPR-082 DCL-07-047 2007-04-27 2007-05-10 WI Pacific Gas and Electric Company- James R. Becker Diablo Canyon Power Plant Vice President P. 0. Box 56 Diablo Canyon Operations and Avila Beach, CA 93424 Station Director 805.545.3462 F

* [2007-05-10] IR 05000275-07-002, 05000323-07-002, on 1/1/07 - 3/31/07, for Diablo Canyon Power Plant Units 1 and 2; Equipment Alignment and Temporary Modifications. ML071280851 2007-05-08 33 05000275 05000323 DPR-080 DPR-082 IR-07-002 2007-05-08 2007-05-09 May 8, 2007 John S. Keenan Senior Vice President - Generation and Chief Nuclear Officer Pacific Gas and Electric Company P.O. Box 770000 Mail Code B32 San Francisco, CA 94177-0001 SUBJECT: D

* [2007-05-10] Transmittal of Diablo Canyon Power Plant Receiving Water Monitoring Program 2006 Annual Report. ML071290113 2007-05-09 ML071280374+ML071290115+ FNWEBNAVIGATE=1.0 SYSTEMTYPE=MEZZANINE DOCUMENTID=071290113 STARTPAGE=1 LIBRARYNAME=ml_adams^hqntad01

* [2007-05-08] Diablo Canyon Power Plant, Unit No. 2, Bulletin 2004-01, "Inspection of Alloy 82/182/600 Materials Used in the Fabrication of Pressurizer Penetrations and Steam Space Piping Connections at Pressurized-Water Reactors" (TAC No. MC3477). ML070990181 2007-04-30 5 05000323 DPR-082 BL-04-001 TAC MC3477 2007-04-30 2007-05-07 April 30, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: B

* [2007-05-08] Humboldt Bay Power Plant Unit 3 - License Amendment Request, Addition of Paragraph 2.C.4. ML071170364 2007-05-01 3 05000133 2007-05-01 2007-05-07 May 1, 2007 Mr. John S. Keenan Senior Vice -President Generation and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Nuclear Power Plant P. O. Box 56 Avila Beach, CA 93424 SUBJECT: HUMBOLDT BAY POWER PLAN

* [2007-05-08] Period of Enforcement Discretion Extension for Diablo Canyon Power Plant, Units 1 and 2, During Implementation of National Fire Protection Association Standard 805. ML062020316 2007-04-29 4 05000275 05000323 DPR-080 DPR-082 NFPA 805 2007-04-29 2007-05-07 April 29, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJE

May 5, 2007

New this week from NRC Public Document Room

* [2007-05-04] Diablo Canyon - First Quarter 2007 Report on Discharge Monitoring, in accordance with Order 90-09, NPDES No. CA0003751. ML071150132 2007-04-19 103 05000275 05000323 DCL-2007-517 2007-04-19 2007-05-03 W Pacific Gas and Electric Company Diablo Canyon Power Plant P0. Box 56 Avila Beach, CA 93424 800.545.6000 Date: IApril 19, 2007 PG&E Letter DCL-2007-517 Certified/Return Receipt #7005-0390-0003-1611-849

* [2007-05-02] 06/05/2007, Notice of Meeting with the Members of the Public, to Provide Members of the Community an Opportunity to Ask Questions and Provide Comments to the NRC Staff On Issues Regarding The Diablo Canyon Power Plant. ML071210093 2007-04-30 4 05000275 05000323 2007-04-30 2007-05-01 April 30, 2007 SUBJECT: MEETING WITH MEMBERS OF THE PUBLIC FACILITY: Diablo Canyon Power Plant DOCKETS: 50-275; 50-323 DATE AND TIME: June 5, 2007 6:30 p.m. (PDT) LOCATION: Embassy Suites Hotel 333 Madonna Road San L

* [2007-05-02] 06/05/2007, Public Meeting with Pacific Gas and Electric Company, to Present the NRC Assessment of Diablo Canyon Safety Performance and to Describe Other NRC Focus Areas for the Period January 1 through December 31, 2006. ML071210064 2007-04-30 4 05000275 05000323 2007-04-30 2007-05-01 April 30, 2007 SUBJECT: PUBLIC MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY FACILITY: Diablo Canyon Power Plant DOCKETS: 50-275; 50-323 DATE AND TIME: June 5, 2007 2:30 p.m. (PDT) LOCATION: Embassy Suites Hotel 333

* [2007-05-02] Diablo Canyon Power Plant, Unit Nos. 1 and 2 - Re: Response to Generic Letter 2006-02 "Grid Reliability and the Impact on Plant Risk and the Operability of Offsite Power" (TAC Nos. MD0974 and MD0975). ML071070049 2007-04-24 5 05000275 05000323 DPR-080 DPR-82 GL-06-002 TAC MD0974 TAC MD0975 2007-04-24 2007-05-01 April 24, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisc

* [2007-05-02] Diablo Canyon, Units 1 & 2 - Generic Letter 2003-01, "Control Room Habitability," Commitment Change. ML071130016 2007-04-13 2 05000275 05000323 DPR-080 DPR-082 DCL-07-045 GL-03-001 OL-DPR-80 OL-DPR-82 2007-04-13 2007-05-01 Pacific Gas and Electric Company ¨ James R. Becker Diablo Canyon Power Plant Vice President P. 0. Box 56 Diablo Canyon Operations and Avila Beach, CA 93424 Sta

April 28, 2007

New this week from NRC Public Document Room

* [2007-04-28] Modification No. 246 to Contract No. NRC-02-02-012. ML071090389 2007-03-26 17 05000133 05000275 05000323 Job Code D1035 Job Code J5226 Job Code J5390 Job Code J5410 Job Code J5434 Job Code J5501 Job Code J5543 NRC-02-02-012 2007-03-26 2007-04-27 AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT IEPA NO. 1. CONTRACT ID C ODE PFAGE 1

* [2007-04-26] Diablo Canyon, Unit 1 & 2 - Issuance of Amendment Nos. 195 and 196 Re: TS 3.4.1 "Reactor Coolant System Pressure, Temperature, & Flow Departure from Nucleate Boiling Limits" & TS 5.6.5 "Core Operating Limits Report." ML070350051 2007-04-17 14 05000275 05000323 DPR-080 DPR-082 TAC MD3979 TAC MD3980 2007-04-17 2007-04-25 ML071140459+ April 17, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Fran

* [2007-04-26] Diablo Canyon, Unit 1 & 2 - Tech Spec Pages for Amendment Nos. 195 and 196 Re: TS 3.4.1 "Reactor Coolant System Pressure, Temperature, & Flow Departure from Nucleate Boiling Limits" & TS 5.6.5 "Core Operating Limits Report." ML070350052 2007-04-17 3 05000275 05000323 DPR-080 DPR-082 TAC MD3979 TAC MD3980 2007-04-17 2007-04-25 ML071140459+ RCS Pressure, Temperature, and Flow DNB Limits 3.4.1 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.1 RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB)

* [2007-04-26] Diablo Canyon, Unit 1 & 2 - Issuance of Amendment Nos. 195 and 196 Re: TS 3.4.1 "Reactor Coolant System Pressure, Temperature, & Flow Departure from Nucleate Boiling Limits" & TS 5.6.5 "Core Operating Limits Report" (TAC Nos. MD3979 and MD3980). ML071140459 2007-04-25 ML070350051+ML070350052+ FNWEBNAVIGATE=1.0 SYSTEMTYPE=MEZZANINE DOCUMENTID=071140459 STARTPAGE=1 LIBRARYNAME=ml_adams^hqntad01

April 21, 2007

New this week from NRC Public Document Room

* [2007-04-21] Diablo Canyon, Unit No. 1 - Generic Letter 2004-02, "Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accident at Pressurized-Water Reactors," Extension Request Approval (TAC No. MD4584). ML071010537 2007-04-12 7 05000275 DPR-080 GL-04-002 TAC MD4584 2007-04-12 2007-04-20 April 12, 2007 Mr. John S. Keenan Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company Diablo Canyon Power Plant P.O. Box 770000 San Francisco, CA 94177-0001 SUBJECT: D

* [2007-04-19] Diablo Canyon, Units 1 and 2, Annual Report of Occupational Radiation Exposure for 2006. ML071000083 2007-03-30 1 05000275 05000323 DPR-080 DPR-082 DCL-07-033 2007-03-30 2007-04-18 WI Pacific Gas and Electric Company ¨ James R. Becker Diablo Canyon Power Plant Vice President P. 0. Box 56 Diablo Canyon Operations and Avila Beach, CA 93424 Station Director 805.545.3462

* [2007-04-18] Letter from Rodney McInnis, NMFS, Regarding Proposed Extension for the Biological Opinions for the Diablo Canyon Power Plant and the San Onofre Nuclear Generating Station. ML060970041 2006-03-21 1 05000275 05000323 05000361 05000362 DPR-080 DPR-082 NPF-010 NPF-015 2006-03-21 2006-04-17 I w 5 UNITED STATES DEPARTMENT OF COMMERCE * . National Oceanic and Atmospheric Administration Qep NATIONAL MARINE FISHERIES SERVICE Southwest Region 501 West Ocean B

February 27, 2007

Diablo Canyon ISFSI ok to continue while NRC completes court-ordered environmental analysis, sez PG&E lawyers

In a brief filed with NRC, PG&E attorneys respond to San Luis Obispo Mothers for Peace argument that the license for Diablo Canyon ISFSI was invalidated by the Ninth Circuit Court of Appeals decision in San Luis Obispo Mothers for Peace v. NRC, 449 F.3d 1016 (9th Cir. 2006), cert. denied (January 16, 2007). The intervenors had sought an NRC order that PG&E "may not use the ISFSI to store spent reactor fuel unless and until the NRC completes the environmental analysis remanded by the U.S. Court of Appeals and re-issues a permit to PG&E for the ISFSI." PG&E's response noted that if the Court of Appeals had intended such injunctive relief, it surely would have mentioned it. PG&E cites variety of precedents against Mothers' take on the matter, including Supreme Court description of injunctive relief as an "extraordinary" equitable remedy that "does not issue as of course." The intervenors claimed that a PG&E request -- that the renewed proceeding move forward -- implicitly concedes that the company has no legal authority to load spent fuel into the ISFSI. PG&E's brief calls this a clever argument, but contrasts the company's repeated and explicit arguments to the contrary as evidence that Mothers' cleverness is no substitute for the facts. PG&E's brief, dated February 13, 2007, is available as ADAMS ACN ML070520443.

December 14, 2006

* Diablo reactor should be up and running again soon
David Sneed and Cynthia Neff, San Luis Obispo Tribune

PNO-IV-06-016, Pacific Gas & Electric Company (Diablo Canyon Power Plant Unit 2), Unusual Event at Diablo Canyon Power Plant, 12/12/2006. ML063460575 2006-12-12 1 05000275 DPR-082 PNO-IV-06-016 2006-12-12 2006-12-13 December 12, 2006 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-IV-06-016 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significa

Recent NRC inspections

* (released March 11) Diablo Canyon report 50-275-2003-8

* (released Nov 27) Diablo Canyon vital battery chargers special team report 50-275-2003-10

* (released Nov 19) Diablo Canyon report 50-275-2003-7

* Diablo Canyon steam generator tube team report 50-323-2003-9

* Diablo Canyon fire protection report 50-275-2003-2

* Diablo Canyon report 50-275-2003-5

* Diablo Canyon safeguards report 50-275-2003-3

* Diablo Canyon report 50-275/2002-5

* 2005-03-29: Nuclear waste safety in doubt: In a classified report, experts say spent fuel is a dangerous terror target; Diablo maintains its underground storage is safe
San Luis Obispo Tribune

* 2005-03-28: Public to have say on Diablo plan
David Sneed, San Luis Obispo Tribune

* 2005-03-23: Additional storage requested for Diablo
David Sneed, San Luis Obispo Tribune

December 25, 2003

Diablo Canyon felt Monday's quake, but it wasn't strong enough to trigger shutdown

After Monday's San Simeon earthquake, Diablo Canyon conducted the procedurally-required follow-up inspections -- tasks which took several workers several hours to complete. Senator Barbara Boxer has asked the NRC to conduct an additional emergency inspection at the plant. Boxer said she has been advised that a quake could damage the underlying foundation of the plant's reactors. "I request you inspect the foundation as well as the cooling tubes and other piping in the facility," she said. "It's important to rule out any damage and therefore any increased risk that may have been caused by the earthquake," she said.

[Ref: Carol Roberts (Knight Ridder Newspapers), "Boxer seeks thorough inspection of nuclear plant", Contra Costa Times, December 25, 2003]

* Diablo Canyon - NRC's reply to Sen. Boxer's post-earthquake request

August 13, 2003

US: A petition filed by environmental groups claiming that Pacific Gas & Electric Co (PG&E) is not qualified to build an independent spent fuel storage installation (ISFSI) at its Diablo Canyon nuclear power plant has been dismissed by the Atomic Safety and Licensing Board (ASLB). The board concluded that the petitioners failed to give any evidence that PG&E was unqualified to carry out the project. Groups opposing the ISFSI said they would appeal the decision to the full Nuclear Regulatory Commission (NRC). The NRC will decide whether or not to grant a construction licence for the ISFSI in three months, after the environmental assessment and safety evaluation reports are completed. (Associated Press, 6 August; SpentFUEL, 11 August, p1; see also News Briefing 03.26-3)

[Source: World Nuclear Association, WNA News Briefing NB03.32-14, August 12, 2003]

August 8, 2003

Diablo Canyon battery charger failures prompt special inspection

NRC will begin a special inspection August 11 to evaluate the failure of battery chargers at Diablo Canyon.

During a 15-month period, there were three battery charger failures at Unit 1 and three failures at Unit 2. The problem has been corrected.

The chargers provide DC power to various safety related and non-safety related systems and equipment throughout the plant. If the chargers are unavailable, batteries can only supply DC power for up to eight hours.

The NRCÕs Special Inspection Team, consisting of a resident inspector and senior reactor engineer from the NRCÕs Region IV office in Arlington, Texas, will evaluate the adequacy of the licenseeÕs response to the battery charger failures, their root cause evaluation, and corrective actions. The inspection will take about one week.

[Source: NRC Region IV press release, "NRC To Conduct Special Inspection At Diablo Canyon", August 8, 2003]

July 11, 2003

* Diablo Canyon ISFSI - NRC evaluation of potential effects on historic properties

June 9, 2003

Diablo Canyon license transfer update

* Diablo Canyon - State & local govt want Commissioners to delay NRC staff's approval of license transfer

May 27, 2003

Diablo Canyon license transferred from PG&E to new limited liability corporations

NRC issued a license transfer order today to Pacific Gas and Electric Company, consenting to the transfer of Diablo Canyon Nuclear Power Plant from PG&E to Electric Generation LLC and Diablo Canyon LLC. Diablo Canyon LLC will become the owner of the facility, while Electric Generation LLC will operate and maintain DCNPP under the terms of a lease that will make Electric Generation LLC responsible for all costs of operation. This application was filed in connection with a comprehensive bankruptcy reorganization and restructuring of the businesses and operations of PG&E, including its nuclear and non-nuclear generation, transmission, and electricity distribution businesses. [Source: Office of Nuclear Reactor Regulation, Items of Interest, Week Ending May 30, 2003 -- see pdf.]

May 20, 2003

Diablo Canyon ASLB to decide financial solvency question for ISFSI license

An NRC Atomic Safety and Licensing Board had an all-day hearing yesterday on the question of whether PG&E is financially solvent enough to warrant licensing of an Independent Spent Fuel Storage Installation at Diablo Canyon. State and local government organizations are amongst those opposed to the proposed dry cask storage facility, and one of their arguments is that the utility failed to make a $10 million payment into the nuclear plant's decommissioning trust fund due to its bankruptcy. The utility assured the Board that there's no problem with funding operations, and that the missed decommissioning fund payment will be made. [Source: David Sneed (The Tribune), Lawyers object to PG&E license; Utility wants to build spent-fuel storage facility, San Luis Obispo Tribune, May. 20, 2003]

ISFSI cost over 20 years - more than $100-million estimate for Diablo Canyon

The proposed ISFSI at Diablo Canyon will cost more than $100 million to build, maintain and decommission over its 20-year life. PG&E wants to have the facility ready to accept the first cask containing spent fuel in 2006. [Source: David Sneed (The Tribune), Lawyers object to PG&E license; Utility wants to build spent-fuel storage facility, San Luis Obispo Tribune, May. 20, 2003]

May 13, 2003

ISFSI - $25-million - $30-million construction cost estimate at Diablo Canyon