ML13032A314

IR 05000275-13-007, 05000323-13-007, on 05/20/2013, Diablo Canyon - Notification of NRC Component Design Bases Inspection and Initial RAI

ML13032A314
Person / Time
Site:	Diablo Canyon
Issue date:	02/01/2013
From:	Thomas Farnholtz Region 4 Engineering Branch 1
To:	Halpin E Pacific Gas & Electric Co
References
IR-13-007
Download: ML13032A314 (7)

See also: IR 05000275/2013007

Text

UNITE D S TATE S

NUC LEAR RE GULATOR Y C OMMI S SI ON

R E G IO N I V

1600 EAST LAMAR BLVD

AR L I NGTON , TEXAS 7 601 1- 4511

February 1, 2013

Mr. Edward D. Halpin

Senior Vice President and

Chief Nuclear Officer

Pacific Gas and Electric Company

Diablo Canyon Power Plant

P.O. Box 56, Mail Code 104/6

Avila Beach, CA 93424

SUBJECT: DIABLO CANYON POWER PLANT - NOTIFICATION OF NRC COMPONENT

DESIGN BASES INSPECTION (05000275/2013007 and 05000323/2013007)

AND INITIAL REQUEST FOR INFORMATION

Dear Mr. Halpin:

On May 20, 2013, the NRC will begin a triennial baseline Component Design Bases Inspection

at the Diablo Canyon Power Plant. A seven-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 five

NRC inspectors and two contractors, of which six will focus on engineering and one on

operations. The current inspection schedule is as follows:

Onsite Information Gathering Visit: May 20-23, 2013

Preparation Week(s): June 3-7, 2013 and June 17-21, 2013

Onsite Week(s): June 10-15, 2013, June 24-28, 2013, and July 8-12, 2013

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.

E. Halpin -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 May 13, 2013. 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 Wayne C. Sifre. We understand that our licensing

engineer contact for this inspection is Mr. Mike McCoy. If there are any questions about the

inspection or the requested materials, please contact the lead inspector by telephone at

817-200-1193 or by e-mail at Wayne.Sifre@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 NRCs 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 R. Farnholtz, Chief

Engineering Branch 1

Division of Reactor Safety

Docket Nos.: 05000275, 05000323

License Nos.: DPR-80, DPR-82

Enclosure:

Component Design Bases Inspection Request for Information

E. Halpin -3-

cc: Electronic Distribution for Diablo Canyon Power Plant

Electronic distribution by RIV:

Regional Administrator (Elmo.Collins@nrc.gov)

Deputy Regional Administrator (Steven.Reynolds@nrc.gov)

DRP Director (Kriss.Kennedy@nrc.gov)

Acting DRP Deputy Director (Barry.Westreich@nrc.gov)

Acting DRS Director (Tom.Blount@nrc.gov)

Acting DRS Deputy Director (Jeff.Clark@nrc.gov)

Senior Resident Inspector (Thomas.Hipschman@nrc.gov)

Resident Inspector (Laura.Micewski@nrc.gov)

Branch Chief, DRP/B (Neil.OKeefe@nrc.gov)

Senior Project Engineer, DRP/B (Leonard.Willoughby@nrc.gov)

Project Engineer, DRP/B (David.You@nrc.gov)

DC Administrative Assistant (Madeleine.Arel-Davis@nrc.gov)

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

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

Project Manager (Joseph.Sebrosky@nrc.gov)

Branch Chief, DRS/TSB (Ray.Kellar@nrc.gov)

RITS Coordinator (Marisa.Herrera@nrc.gov)

Regional Counsel (Karla.Fuller@nrc.gov)

Technical Support Assistant (Loretta.Williams@nrc.gov)

Congressional Affairs Officer (Jenny.Weil@nrc.gov)

OEMail Resource

RIV/ETA: OEDO (John.Cassidy@nrc.gov)

DRS/TSB STA (Dale.Powers@nrc.gov)

S:\DRS\REPORTS\Reports Drafts\DC 2013007 RFI WCS.docx ML13032A314

SUNSI Review Non-Sensitive Publicly Available

Initials:WCS Sensitive Non-Publicly Available

SRI:EB1 C:EB1

WSifre TFarnholtz

/RA/ /RA/

1/30/13 2/1/13

OFFICIAL RECORD COPY

Initial Request for Information

Component Design Bases Inspection

Diablo Canyon Power Plant

Inspection Report: 05000275/2013007, 05000323/2013007

Information Gathering Dates: May 20, 2013

Inspection Dates: June 10-13, 2013, June 24-28, 2013, July 8-12, 2013

Inspection Procedure: IP 71111.21, Component Design Bases Inspection

Lead Inspector: Wayne C. Sifre, Senior Reactor Inspector

I. Information Requested Prior to Information Gathering Visit (May 20, 2013)

The following information (Section I of this enclosure) should be sent to the Region IV

office in hard copy or electronic format (Certrec IMS preferred), to the attention of Wayne

Sifre by May 13, 2013, to facilitate the reduction in the items to be selected for a final list

during the preparation week June 3, 2013. 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.

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.

-1- Enclosure

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

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.

-2- Enclosure

II. Information Requested to be Available on First Day of Preparation Week (June 3,

2013)

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.

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.

-3- Enclosure

III. Information Requested to be provided throughout the inspection.

1. Copies of any corrective action documents generated as a result of the teams

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:

Wayne C. Sifre Robert Latta Clyde Osterholtz

Senior Reactor Inspector Senior Reactor Inspector Senior Operations Engineer

817-200-1193 817-200-1532 817-200-1269

Wayne.Sifre@nrc.gov Robert.Latta@nrc.gov Clyde.Osterholtz@nrc.gov

Jeffrey Josey John Watkins

Senior Resident Inspector Reactor Inspector

Jeffrey.Josey@nrc.gov John.Watkins@nrc.gov

Mailing Address:

U.S. NRC, Region IV

Attn: Wayne C. Sifre

1600 East Lamar Blvd.

Arlington, TX 76011-4511

-4- Enclosure