ML111110841
| ML111110841 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/21/2011 |
| From: | Thomas Farnholtz Region 4 Engineering Branch 1 |
| To: | Peter Dietrich Southern California Edison Co |
| References | |
| Download: ML111110841 (8) | |
See also: IR 05000361/2011010
Text
UNITED STATES
NUCLEAR REGULATORY COMMISSIO~J
REGION IV
612 E. LAMAR BLVD., SUITE 400
ARLiNGTON, TEXAS i6011~4005
April 21, 2011
Mr. Peter Dietrich
Senior Vice President and
Chief Nuclear Officer
Southern California Edison Company
San Onofre Nuclear Generating Station
P.O. Box 128
San Clemente, CA 92674-0128
SUBJECT: SAN ONOFRE NUCLEAR GENERATING STATION -INITIAL
INFORMATION REQUEST FOR NRC TRIENNIAL BASELINE
COMPONENT DESIGN BASES INSPECTiON NRC INSPECTION
REPORT 05000361/2011010 and 05000362/2011010
Dear Mr. Dietrich
On June 20, 2011, the NRC will begin a triennial baseline Component Design Bases
Inspection at San Onofre Nuclear Generating Station. An eight-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 uperating 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 three weeks of onsite inspection by the team. The inspection
will consist of four NRC inspectors, one NRC inspector in training, and three contractors.
Five inspectors wili focus on mechanical engineering activities, two inspectors wiii focus
on electrical engineering activities, and one inspector will focus on operations. The
current inspection schedule is as follows:
Onsite information gathering visit: Week of May 31, 2011
Preparation Week: June 13-17, 2011
Onsite weeks: June 20-24, 2011; July 4-8, 2011; July 18-23, 2011
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 tirne will
be needed on the plant-referenced simulator in order to facilitate the development of
operator action-based scenarios. Additional information documentation needed to
support the inspection will be identified during the inspection, including interviews with
engineering managers, engineers, and probabilistic safety assessment staff.
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 May 25, 2011. 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 to review during the information gathering visit to assist
in our selection of components based on available design margin.
The second group of documents requested is 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 Ronald A. Kopriva. 'vVe understand that our
licensing engineer contact for this inspection is David Axline. 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 ~=~=~=.:-.:~
This letter does not contain new or amended information collection requirements subject
to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). Existing information
collection requirements were approved by the Office of Management and Budget, control
number 3150-0011. The NRC may not conduct or sponsor, and a person is not required
to respond to, a request for information or an information collection requirement unless
the requesting document displays a currently valid Office of Management and Budget
control number.
-2-
Edison
In accordance 10 2.390 of "a
will be made available electronically for public inspection in the NRC
Room or from the Publicly Available Records (PARS) component of NRC's document
system (ADAMS). ADAMS is accessible from the NRC Web site at
Public Reading Room).
sincerelCC
Thomas Farnholtz, Chief
Engineering Branch 1
Division of Reactor Safety
Docket Nos. 50-361,50-362
Enclosure:
Component Design Basis Inspection
Document Request
cc w/enclosure:
Distribution via List Serv for San Onofre Nuclear Generating Station
-3-
INFORMATION REQUEST FOR SAN ONOFRE NUCLEAR GENERATING STATION
COMPONENT DESIGN BASES (CDBI) INSPECTION
Inspection Report: 05000361/2011010 and 05000362/2011010
Information Gathering Dates: May 31 - June3, 2011
On-site Inspection Dates: June 20 - 24, 2011
July 4 - 8, 2011
July 18 - 22,2011
Inspection Procedure: IP 71111.21, "Component Design Bases
Inspection"
Lead InspectorlTeam Leader: Ronald A. Kopriva
817-860-8104
Ron.kopirva@nrc.gov
A. Information Requested Prior to the Information Gathering Visit (May 25, 2011)
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 or compact
disc, preferred), in care of Ronald A. Kopriva, by May 25, 2011 to facilitate the
reduction in the items to be selected for a final list during the preparation week of
June 13, 20111. The inspection team will finalize the selected list during the prep
vJeek using the additional documents requested in Section !! 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.
4. excel spreadsheet action basic events or risk ranking
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, (Le., 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. The San Onofre Nuclear Generating Station IPEEE, if available
electronically.
16. Mechanical piping drawings for:
Engineered safety features
Emergency core cooling systems
17. Electrical one-line drawings for:
Offsite power/switch yard supplies
Normal AC power systems
Emergency ACIDC power systems including
120VAC power, and
125VDC!24VDC safety class systems
-2- 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.
21. System Description Manuals with simplified drawings of plant systems
22. List of system aCiOnyms.
B. Information Requested to be Available on First Day of Preparation Week (June
13,2011)
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 piOvide 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.
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1 Structure, """OTO'rY'I and nr",onT'" in (a)(1)
category.
13. Site top 10 issues list.
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.
C. 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
Senior Reactor Inspector
(817) 860-8104
Ron.kopriva@nrc.gov
Mailing Address:
US NRC, Region IV
Attn: Ron Kopriva
612 East Lamar Blvd, Ste 400
Arlington, TX 76011
- 4- Enclosure