ML093450334
| ML093450334 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/10/2009 |
| From: | Thomas Farnholtz Region 4 Engineering Branch 1 |
| To: | Conway J Pacific Gas & Electric Co |
| References | |
| IR-10-007 | |
| Download: ML093450334 (9) | |
See also: IR 05000275/2010007
Text
December 10, 2009
John T. Conway, Senior Vice President and Chief Nuclear Officer Pacific Gas and Electric Company 77 Beale Street, B32 San Francisco, CA 94105
SUBJECT: DIABLO CANYON POWER PLANT - INITIAL INFORMATION REQUEST FOR NRC TRIENNIAL BASELINE COMPONENT DESIGN BASES INSPECTION NRC INSPECTION REPORT 05000275/2010007 AND 05000323/2010007
Dear Mr. Conway
On February 8, 2010, the NRC will begin a triennial baseline Component Design Bases Inspection at the Diablo Canyon Power Plant. A six-person team will perform this inspection using NRC Inspection Procedure 71111.21, "Component Design Bases Inspection." The inspection focuses on components and operator actions that have high risk and low design
margins. The samples reviewed during this inspection will be identified during an information gathering visit and during the subsequent in-office preparation week. In addition, a number of operating experience issues will also be selected for review.
The inspection will include an information gathering site visit by the team leader and a senior
reactor analyst, and 3-weeks of onsite inspection by the team. The inspection will consist of four NRC inspectors and two contractors, of which three inspectors will focus on engineering and one inspector on operations. The current inspection schedule is as follows:
Onsite information gathering visit: Week of January 25-29, 2010
Preparation Week: February 1-5, 2010 Onsite weeks: February 8-12, 2010 and February 22-March 5, 2010
The purpose of the information gathering visit is to meet with members of your staff to identify potential risk-significant components and operator actions. The lead inspector will also request a tour of the plant with members of your operations staff and probabilistic safety assessment staff. During the onsite weeks, several days of time will be needed on the plant-referenced
simulator in order to facilitate the development of operator action-based scenarios. Additional information and documentation needed to support the inspection will be identified during the inspection, including interviews with engineering managers, engineers, and probabilistic safety assessment staff.
UNITED STATESNUCLEAR REGULATORY COMMISSIONREGION IV612 E. LAMAR BLVD., SUITE 400ARLINGTON, TEXAS 76011-4005
Pacific Gas and Electric Company - 2 -
Our experience with these inspections has shown that they are extremely resource intensive, both for the NRC inspectors and the licensee staff. In order to minimize the inspection impact on the site and to ensure a productive inspection, we have enclosed a request for information
needed for the inspection. The request has been divided into three groups. The first group lists information necessary for the information gathering visit and for general preparation. This information should be available to the regional office no later than January 20, 2010. Insofar as possible, this information should be provided electronically to the lead inspector. Since the inspection will be concentrated on high risk/low margin components, calculations associated
with your list of high risk components should be available for review during the information gathering visit to assist in our selection of components based on available design margin.
The second group of documents requested are those items that the team will need access to during the preparation week in order to finalize the samples to be inspected. The third group lists information necessary to aid the inspection team in tracking issues identified as a result of the inspection. It is requested that this information be provided to the lead inspector as the
information is generated during the inspection. Additional requests by inspectors will be made throughout all three onsite weeks for specific documents needed to complete the review of that component/selection. It is important that all of these documents are up to date and complete in order to minimize the number of additional documents requested during the preparation and/or the onsite portions of the inspection. In order to facilitate the inspection, we request that a contact individual be assigned to each inspector to ensure information requests, questions, and concerns are addressed in a timely manner.
The lead inspector for this inspection is Mr. Ronald A. Kopriva. We understand that our licensing engineer contact for this inspection is Mr. Steve Zawalick. If there are any questions about the inspection or the requested materials, please contact the lead inspector at (817) 860-8104 or via e-mail at ron.kopriva@nrc.gov. In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter 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 document system (ADAMS). ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Sincerely, /RA/
Thomas Farnholtz, Chief Engineering Branch 1 Division of Reactor Safety
Docket: 50-275 50-323 License: DPR-80 DPR-82
Pacific Gas and Electric Company - 3 -
Enclosure: Component Design Basis Inspection Document Request
cc w/enclosure:
Sierra Club San Lucia Chapter ATTN: Andrew Christie P.O. Box 15755
San Luis Obispo, CA 93406
Nancy Culver 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
San Luis Obispo, CA 93408
Truman Burns\Robert Kinosian California Public Utilities Commission 505 Van Ness Ave., Rm. 4102
San Francisco, CA 94102
Diablo Canyon Independent Safety Committee Attn: Robert R. Wellington, Esq. Legal Counsel
857 Cass Street, Suite D Monterey, CA 93940
Director, Radiological Health Branch State Department of Health Services 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 Diablo Canyon Power Plant
P.O. Box 56 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
Pacific Gas and Electric Company - 5 -
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) Senior Resident Inspector (Michael.Peck@nrc.gov)
Resident Inspector (Tony.Brown@nrc.gov) Branch Chief, DRP/B (Vincent.Gaddy@nrc.gov) Senior Project Engineer, DRP/B (Rick.Deese@nrc.gov) DC Administrative Assistant (Agnes.Chan@nrc.gov) Public Affairs Officer (Victor.Dricks@nrc.gov) Branch Chief, DRS/TSB (Michael.Hay@nrc.gov) RITS Coordinator (Marisa.Herrera@nrc.gov)
Regional Counsel (Karla.Fuller@nrc.gov) Congressional Affairs Officer (Jenny.Weil@nrc.gov) OEMail Resource OEDO RIV Coordinator (Leigh.Trocine@nrc.gov) D. Norkin, NRR CDBI Coordinator (Donald.Norkin@nrc.gov)
SUNSI Review Completed: _X__Yes __X__ ADAMS: Yes No Initials: _TRF
_ Publicly Available Non-Publicly Available Sensitive Non-Sensitive
ML093450334 RIV:SRI:DRS/EB1 BC/EB1 RAKopriva TFarnholtz /RA/ /RA/ 12/10/09 12/10/09 OFFICIAL RECORD COPY T=Telephone E=E-mail F=Fax
- 1 - Enclosure INFORMATION REQUEST FOR DIABLO CANYON POWER PLANT COMPONENT DESIGN BASES (CDBI) INSPECTION
Inspection Report: 05000275/2010007 05000323/2010007
Information Gathering Dates: January 25-29, 2010
On-site Inspection Dates: February 8-12, 2010 February 22 - March 5, 2010
Inspection Procedure: IP 71111.21, "Component Design Bases Inspection" Lead Inspector/Team Leader: Ronald A. Kopriva 817-860-8104
Ron.kopriva@nrc.gov
I. Information Requested Prior to the information Gathering Visit (January 20, 2010)
The following information (Section I of this enclosure) should be sent to the Region IV office in hard copy or electronic format (ims.certrec.com and compact disc, preferred), in care of Ronald A. Kopriva, January 20, 2010 to facilitate the reduction in the items to be selected for a final list during the preparation week of February 1-5, 2010. The inspection team will finalize the selected list during the prep week using the additional documents requested in Section II of this enclosure. The specific items selected from the lists shall be available and ready for review on the day indicated in this request.
- Please provide requested documentation electronically in "pdf" files, Excel, or other searchable formats, if possible. The information should contain descriptive names, and be indexed and hyperlinked to facilitate ease of use. Information in "lists" should contain enough information to be easily understood by someone who has knowledge of pressurized water reactor technology. If requested documents are large and only hard
copy formats are available, please inform the inspector(s), and provide subject documentation during the first day of the onsite inspection.
1. An excel spreadsheet of equipment basic events (with definitions) including importance measures sorted by risk achievement worth (RAW) and Fussell-Vesely (FV) from your internal events probabilistic risk assessment (PRA). Include basic events with RAW value of 1.3 or greater.
2. Provide a list of the top 500 cut-sets from your PRA.
3. Copies of PRA "system notebooks," and the latest PRA summary document.
- 2 - Enclosure 4. An excel spreadsheet of PRA human action basic events or risk ranking of operator actions from your site specific PSA sorted by RAW and FV. Provide copies of your human reliability worksheets for these items.
5. If you have an external events or fire PSA model, provide the information requested in items 1-4 for external events and fire.
6. Any pre-existing evaluation or list of components and associated calculations with low design margins, (i.e., pumps closest to the design limit for flow or pressure, diesel generator close to design required output, heat exchangers close to rated design heat removal, etc.).
7. List of high risk maintenance rule systems/components and functions; based on engineering or expert panel judgment.
8. A list of operating experience evaluations for the last 2 years.
9. A list of all time-critical operator actions in procedures.
10. A list of permanent and temporary modifications sorted by component identified in Item 1.
11. List of current "operator work arounds/burdens."
12. A list of the design calculations, which provide the design margin information for components included in Item 1. (Calculations should be available during the information gathering visit).
13. List of root cause evaluations associated with component failures or design issues initiated/completed in the last 5 years.
14. Current management and engineering organizational charts.
15. Diablo Canyon Power Plant IPEEE, if available electronically.
16. Mechanical piping drawings for:
Engineered safety features
Emergency core cooling systems Emergency diesel generators
17 Electrical one-line drawings for:
Offsite power/switchyard supplies Normal AC power systems Emergency AC/DC power systems including 120VAC power, and 125VDC/24VDC safety class systems
- 3 - Enclosure 18. List of any common-cause failures of components in the last 3 years.
19. An electronic copy of the Design Bases Documents.
20. An electronic copy of the System Health notebooks.
II. Information Requested to be Available on First Day of Preparation Week (February 1, 2010) 1. List of condition reports (corrective action documents) associated with each of the selected components for the last 5 years.
2. The corrective maintenance history associated with each of the selected components for the last 2 years.
3. Copies of calculations associated with each of the selected components (if not previously provided), excluding data files. Please review the calculations and also provide copies of reference material (such as drawings, engineering requests, and vendor letters).
4. Copies of operability evaluations associated with each of the selected components and plans for restoring operability, if applicable.
5. Copies of selected operator work-around evaluations associated with each of the selected components and plans for resolution, if applicable.
6. Copies of any open temporary modifications associated with each of the selected components, if applicable.
7. Trend data on the selected electrical/mechanical components' performance for last 3 years (for example, pumps' performance including in-service testing, other vibration monitoring, oil sample results, etc., as applicable).
8. A copy of any internal/external self-assessments and associated corrective action documents generated in preparation for the inspection.
9. A copy of engineering/operations related audits completed in the last 2 years.
10. List of motor operated valves (MOVs) in the program, design margin and risk ranking. 11. List of air operated valves (AOVs) in the valve program, design and risk ranking.
12. Structure, system and components in the Maintenance Rule (a)(1) category.
13. Site top 10 issues list.
- 4 - Enclosure 14. Procedures used to accomplish operator actions associated with the basic events in your PRA.
15. List of licensee contacts for the inspection team with pager or phone numbers.
III. Information Requested to be provided throughout the inspection.
1. Copies of any corrective action documents generated as a result of the team's questions or queries during this inspection.
2. Copies of the list of questions submitted by the team members and the status/resolution of the information requested (provide daily during the inspection to each team member).
3. Reference materials (available electronically and as needed during all onsite weeks): General set of plant drawings IPE/PRA report Procurement documents for components selected Plant procedures (normal, abnormal, emergency, surveillance, etc.)
Technical Specifications Updated Final Safety Analysis Report Vendor manuals
Inspector Contact Information
- Ronald A. Kopriva - Team Lead Senior Reactor Inspector (817) 860-8104 Ron.kopriva@nrc.gov
Mailing Address
- US NRC, Region IV Attn: Ronald A. Kopriva
612 East Lamar Blvd, Ste 400 Arlington, TX 76011