IR 05000275/2010001

Annual Assessment Letter - Diablo Canyon Power Plant (NRC IR 05000275-10-001 and 05000323-10-001

ML100620897
Person / Time
Site:	Diablo Canyon
Issue date:	03/03/2010
From:	Chamberlain D NRC/RGN-IV/DRP
To:	Conway J Pacific Gas & Electric Co
References
IR-10-001
Download: ML100620897 (7)

Text

UNITED STATES NU C LE AR RE G ULATO RY C O M M I S S I O N rch 3, 2010

SUBJECT:

ANNUAL ASSESSMENT LETTER - DIABLO CANYON POWER PLANT (NRC INSPECTION REPORT 05000275/2010001 AND 05000323/2010001)

Dear Mr. Conway:

On February 17, 2010, the NRC staff completed its performance review of Diablo Canyon Power Plant. Our technical staff reviewed performance indicators for the most recent quarter and inspection results for the period from January 1 through December 31, 2009. The purpose of this letter is to inform you of our assessment of your safety performance during this period and our plans for future inspections at your facility.

This performance review and enclosed inspection plan do not include security information. A separate letter designated and marked as "Official Use Only - Security-Information" will include the security cornerstone review and resultant inspection plan.

Overall, Diablo Canyon Units 1 and 2 operated in a manner that preserved public health and safety and fully met all cornerstone objectives. Plant performance for the most recent quarter, as well as for the first three quarters of the assessment cycle, was within the Licensee Response column of the NRC=s Action Matrix, based on all inspection findings being classified as having very low safety significance (Green) and all performance indicators indicating performance at a level requiring no additional NRC oversight (Green). Therefore, we plan to conduct reactor oversight process baseline inspections at your facility. In addition to baseline inspections, we also plan on implementing inspection procedure 71007, Reactor Vessel Head Replacement Inspection, for Unit 1. The staff will also be conducting Inspection Procedure 92723, Follow Up Inspection for Three or More Severity Level IV Traditional Enforcement Violations in the Same Area in a 12-Month Period, to follow up on six Severity Level IV violations in the traditional enforcement area of impeding the regulatory process.

Additionally, the staff has identified a substantive cross-cutting issue in the area of problem identification and resolution associated with the thoroughness of problem evaluation P.1(c).

The staff first identified this theme in the 2008 annual assessment letter, dated March 4, 2009.

This theme continued through the 2009 mid-cycle assessment as discussed in our September 1, 2009, letter. The staff has concluded that this theme continued again through the

Pacific Gas and Electric Company -2-current 12 month assessment period with six Green findings documented with this cross-cutting aspect. Recent examples include: the failure to perform an adequate evaluation for damping values for the Unit 2 replacement reactor vessel head; the failure to identify and correct a degraded fire door latching mechanism; and an inadequate evaluation of operator actions related to the steam generator tube rupture accident analysis. While you have implemented a range of substantial corrective actions to address the cross-cutting theme, these actions have yet to prove effective in mitigating the continuing trend. It is not apparent that you have fully evaluated the depth and breadth of the issue to ensure the effectiveness of your corrective actions. The NRC has concluded that you should assess why your past corrective actions have not been effective in mitigating the trend and make adjustments as appropriate to ensure that you achieve results in correcting the trend. We will monitor your progress in addressing this cross-cutting issue through baseline inspections, including semi-annual trend reviews and the biennial problem identification and resolution team inspection. This substantive cross-cutting issue will remain open until we determine that corrective actions have resulted in sustained improved performance as demonstrated by no safety significant findings and a reduction in the number of findings with the same causal factor, specifically focusing on the most recent 6-month period reviewed in the assessment period.

The enclosed inspection plan details the inspections, less those related to physical protection scheduled through June 30, 2011. The inspection plan is provided to allow for the resolution of any scheduling conflicts and personnel availability issues well in advance of inspector arrival onsite. Routine resident inspections are not listed due to their ongoing and continuous nature.

The inspections in the last nine months of the inspection plan are tentative and may be revised at the mid-cycle review.

In accordance with 10 CFR 2.390 of the NRC=s ARules of Practice,@ a copy of this letter and its enclosure will be made available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRC's Agencywide Documents Access and Management System (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).

If circumstances arise which cause us to change this inspection plan, we will contact you to discuss the change as soon as possible. Please contact Mr. Geoffrey Miller at 817-860-8141 with any questions you may have regarding this letter or the inspection plan.

Sincerely,

/RA/

Dwight D. Chamberlain, Director Division of Reactor Projects Docket Nos. 50-275, 50-323 License Nos. DPR-80, DPR-82 Enclosure: Diablo Canyon Inspection / Activity Plan

Pacific Gas and Electric Company -3-Sierra Club San Lucia Chapter ATTN: Andrew Christie P.O. Box 15755 San Luis Obispo, CA 93406 Jane Swanson San Luis Obispo Mothers for Peace P.O. Box 164 Pismo Beach, CA 93448 Chairman San Luis Obispo County Board of Supervisors 1055 Monterey Street, Suite D430 Room 370, County Government Center San Luis Obispo, CA 93408 Truman Burns\Robert Kinosian California Public Utilities Commission 505 Van Ness Ave., Rm. 4102 San Francisco, CA 94102 Jennifer Post, Esq.

Pacific Gas & Electric Co.

77 Beale Street, Room 2496 Mail Code B30A San Francisco, CA 94120 Mr. Gary Butner Chief, Radiologic Health Branch California Department of Public P.O. Box 997414 (MS 7610)

Sacramento, CA 95899-7414 City Editor The Tribune 3825 South Higuera Street P.O. Box 112 San Luis Obispo, CA 93406-0112 James D. Boyd, Commissioner California Energy Commission 1516 Ninth Street (MS 31)

Sacramento, CA 95814

Pacific Gas and Electric Company -4-James R. Becker, Site Vice President Pacific Gas and Electric Company Diablo Canyon Nuclear Plant P.O. Box 3, Mail Station 104/6/601 Avila Beach, CA 93424 Jennifer Tang Field Representative United States Senator Barbara Boxer 1700 Montgomery Street, Suite 240 San Francisco, CA 94111 Chief, Technological Hazards Branch FEMA Region IX 1111 Broadway, Suite 1200 Oakland, CA 94607-4052 Federal Emergency Management Agency Regional Administrator, Region IX 1111 Broadway, Suite 1200 Oakland, CA 94607 The Mayor of the City of Arroyo Grande City of Arroyo Grande P.O. Box 550 Arroyo Grande, CA 93421 The Mayor of the City of Grover Beach City of Grover Beach 154 S. 8th Street Grover Beach, CA 93433 The Mayor of the City of Morro Bay City of Morro Bay 595 Harbor Street Morro Bay, CA 93442 The Mayor of the City of San Luis Obispo City of San Luis Obispo 990 Palm Street San Luis Obispo, CA 93401 The Mayor of the City of Pismo Beach City of Pismo Beach 760 Mattie Road Pismo Beach, CA 93449

Pacific Gas and Electric Company -5-Frank Mecham, Supervisor District One San Luis Obispo County Board of Supervisors 1055 Monterey Street, Ste. D430 San Luis Obispo, CA 93408 Bruce Gibson, Supervisor District Two San Luis Obispo County Board of Supervisors 1055 Monterey Street, Ste. D430 San Luis Obispo, CA 93408 Adam Hill, Supervisor District Three San Luis Obispo County Board of Supervisors 1055 Monterey Street, Ste. D430 San Luis Obispo, CA 93408 Khatchik Achadjian, Supervisor District Four San Luis Obispo County Board of Supervisors 1055 Monterey Street, Ste. D430 San Luis Obispo, CA 93408 James Patterson, Supervisor District Five San Luis Obispo County Board of Supervisors 1055 Monterey Street, Ste. D430 San Luis Obispo, CA 93408

Pacific Gas and Electric Company -6-Electronic distribution by RIV:

Regional Administrator (Elmo.Collins@nrc.gov)

Deputy Regional Administrator (Chuck.Casto@nrc.gov)

DRP Director (Dwight.Chamberlain@nrc.gov)

DRP Deputy Director (Anton.Vegel@nrc.goV)

DRS Director (Roy.Caniano@nrc.gov)

DRS Deputy Director (Troy.Pruett@nrc.gov)

Branch Chief, DRP/B (Geoffrey.Miller@nrc.gov)

Senior Project Engineer, DRP/B (Rick.Deese@nrc.gov)

Senior Resident Inspector (Michael.Peck@nrc.gov)

Resident Inspector (Tony.Brown@nrc.gov)

Branch Chief, DRS/TSB (Michael.Hay@nrc.gov)

RITS Coordinator (Marisa.Herrera@nrc.gov)

Public Affairs Officer (Victor.Dricks@nrc.gov)

Public Affairs Officer (Lara.Uselding@nrc.gov)

Regional State Liaison Officer (Bill.Maier@nrc.gov)

RA Administrative Assistant (Lucy.Owen@nrc.gov)

DRA Administrative Assistant (Anita.Tannenbaum@nrc.gov)

Branch Chief, DRS/EB1 (Thomas.Farnholtz@nrc.gov)

Branch Chief, DRS/EB2 (Neil.OKeefe@nrc.gov)

Branch Chief, DRS/PSB1 (Michael.Shannon@nrc.gov)

Branch Chief, DRS/PSB2 (Greg.Werner@nrc.gov)

Branch Chief, DRS/OB (Mark.Haire@nrc.gov)

OEDO RIV Coordinator (Leigh.Trocine@nrc.gov)

Director, DIRS, NRR (Frederick.Brown@nrc.gov)

Director, DORL, NRR (Joseph.Giitter@nrc.gov)

Deputy Director, DORL, NRR (Robert.Nelson@nrc.gov)

Chief, PLB IV, DORL, NRR (Michael.Markley@nrc.gov)

NRR Project Manager (Alan.Wang@nrc.gov)

RidsNrrDirslpab Resource@nrc.gov ROPreports.Resource@nrc.gov Congressional Affairs Officer (Jenny.Weil@nrc.gov)

mortensengk@INPO.org File located: R:\_Reactors\EOC2009\DC.doc SUNSI Rev Compl. ; Yes No ADAMS  ; Yes No Reviewer Initials GM Publicly Avail ; Yes No Sensitive Yes ; No Sens. Type Initials GM C:DRP/B D:DRS D:DRP GMiller RJCaniano DDChamberlain

/RA/ /RA/ /RA/

2/25/10 2/25/10 3/1/10 OFFICIAL RECORD COPY T=Telephone E=E-mail F=Fax

Page 1 of 1 Diablo Canyon 02/18/2010 10:36:14 Inspection / Activity Plan Report 22 04/01/2010 - 06/30/2011 Unit Planned Dates No. of Staff Number Start End Inspection Activity Title on Site TSB-52B - BIENNIAL PI&R 4 1, 2 03/29/2010 04/02/2010 IP 71152B Identification and Resolution of Problems 1, 2 04/12/2010 04/16/2010 IP 71152B Identification and Resolution of Problems EXAM - INITIAL EXAM 3 1 04/12/2010 04/16/2010 X02435 INITIAL EXAM- DC (4/31/2010)

1 05/17/2010 05/21/2010 X02435 INITIAL EXAM- DC (4/31/2010)

RS678 - RADIATION SAFETY TEAM 3 1, 2 05/24/2010 05/28/2010 IP 71124.06 Radioactive Gaseous and Liquid Effluent Treatment 1, 2 05/24/2010 05/28/2010 IP 71124.07 Public Radiation Safety 1, 2 05/24/2010 05/28/2010 IP 71124.08 Radioactive Solid Waste Processing and Radioactive Material Handling, Storage, and Transportation 1 05/24/2010 05/28/2010 IP 71151-OR01 Occupational Exposure Control Effectiveness 1 05/24/2010 05/28/2010 IP 71151-PR01 RETS/ODCM Radiological Effluent EP-1 - BIENNIAL EP EXERCISE INSPECTION 4 1, 2 08/09/2010 08/13/2010 IP 7111401 Exercise Evaluation 1, 2 08/09/2010 08/13/2010 IP 7111404 Emergency Action Level and Emergency Plan Changes 1, 2 08/09/2010 08/13/2010 IP 71151-EP01 Drill/Exercise Performance 1, 2 08/09/2010 08/13/2010 IP 71151-EP02 ERO Drill Participation 1, 2 08/09/2010 08/13/2010 IP 71151-EP03 Alert & Notification System EB2-LRI - LICENSE RENEWAL INSPECTION 6 1, 2 08/16/2010 08/20/2010 IP 71002 License Renewal Inspection 1, 2 09/13/2010 09/13/2010 IP 71002 License Renewal Inspection PSB2-08P - INSERVICE INSPECTION - U1 2 1 10/12/2010 11/05/2010 IP 2515/172 Reactor Coolant System Dissimiliar Metal Butt Welds 1 10/12/2010 11/05/2010 IP 7111108P Inservice Inspection Activities - PWR RS12 - OCCUPATIONAL RADIATION SAFETY 2 1, 2 10/18/2010 10/22/2010 IP 71124.01 Radiological Hazard Assessment and Exposure Controls 1, 2 10/18/2010 10/22/2010 IP 71124.02 Occupational ALARA Planning and Controls 2 10/18/2010 10/22/2010 IP 71151-OR01 Occupational Exposure Control Effectiveness 2 10/18/2010 10/22/2010 IP 71151-PR01 RETS/ODCM Radiological Effluent EB1-07T - TRIENNIAL HEAT SINK PERFORMANCE 1 1, 2 12/06/2010 12/10/2010 IP 7111107T Heat Sink Performance PSB2-08P - INSERVICE INSPECTION - U2 3 2 04/04/2011 04/29/2011 IP 7111108P Inservice Inspection Activities - PWR This report does not include INPO and OUTAGE activities.

This report shows only on-site and announced inspection procedures.