ML110470585

Notification of Inspection (NRC Inspection Report 0500027511-004; 05000323-11-004) & Request for Information

ML110470585
Person / Time
Site:	Diablo Canyon
Issue date:	02/16/2011
From:	Thomas Farnholtz Region 4 Engineering Branch 1
To:	Conway J Pacific Gas & Electric Co
References
IR-11-004
Download: ML110470585 (7)

See also: IR 05000275/2011004

Text

UNITED STATES

NUC LE AR RE G ULATO RY C O M M I S S I O N

R E GI ON I V

612 EAST LAMAR BLVD , SU I TE 400

AR LI N GTON , TEXAS 76011-4125

February 16, 2011

John T. Conway

Senior Vice President-Energy &

Supply and Chief Nuclear Officer

Pacific Gas and Electric Company

Diablo Canyon Nuclear Plant

77 Beale Street, Mail Code B32

San Francisco, CA 94105

SUBJECT: DIABLO CANYON POWER PLANT - NOTIFICATION OF INSPECTION

(NRC INSPECTION REPORT 05000275/2011004; 05000323/2011004) AND

REQUEST FOR INFORMATION

Dear Mr. Conway:

On June 27, 2011, the NRC will begin the onsite portion of the Gas Accumulation Management

in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Temporary

Instruction at your Diablo Canyon Power Plant. This inspection will be performed in accordance

with NRC Temporary Instruction (TI) 2515/177.

Experience has shown that this inspection is resource intensive both for the NRC inspectors

and your staff. In order to minimize the impact to your onsite resources and to ensure a

productive inspection, we have enclosed a request for documents needed for this inspection.

The documents have been divided into two groups.

• The first group lists information necessary for our initial inspection scoping and in-office

preparation activities. This information should be separated by information request number,

especially if provided electronically (e.g., folder with the information request number). This

information should be available to the inspector no later than June 6, 2011. Upon review of

these documents, the inspectors will select additional documentation for review upon arrival.

By June 23, 2011, the inspector will communicate the initial selected samples.

• The second group of documents requested is needed to support our onsite inspection

activities. This set of documents should be available to the inspector on June 27, 2011. It is

also requested that corrective action documents and responses to questions developed

during the inspection be provided to the inspector as the documents are generated.

We have discussed the schedule for these inspection activities with your staff and understand

that our regulatory contact for this inspection will be Michael McCoy of your licensing

organization. If there are any questions about this inspection or the material requested, please

contact the inspector, Dustin Reinert, at 817-860-8244 or by email at dustin.reinert@nrc.gov.

Pacific Gas and Electric Company 2

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.

In accordance with Code of Federal Regulations, Title 10, Part 2.390 of the NRC's Rules of

Practice, a copy of this letter and its enclosure will be 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 R. Farnholtz, Chief

Engineering Branch 1

Division of Reactor Safety

Dockets: 50-275; 50-323

License: DPR-80; DPR-82

Enclosure: MANAGEMENT OF GAS ACCUMULATION IN EMERGENCY CORE

COOLING, DECAY HEAT REMOVAL, AND CONTAINMENT SPRAY

SYSTEMS TEMPORARY INSTRUCTION DOCUMENT REQUEST

cc w/encl:

Sierra Club Santa 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 3608

San Luis Obispo, CA 93403

James Grant, County Administrative Officer

San Luis Obispo County Board of

Supervisors

1055 Monterey Street, Suite D430

San Luis Obispo, CA 93408

Pacific Gas and Electric Company 3

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

Gary Butner

Chief, Radiologic Health Branch

California Department of Public Health 3

P.O. Box 997414 (MS 7610)

Sacramento, CA 95899-7414

The City Editor of

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

James R. Becker, Site Vice President

Pacific Gas and Electric Company

Diablo Canyon Nuclear Plant

P.O. Box 56, 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

Pacific Gas and Electric Company 4

Electronic distribution by RIV:

Regional Administrator (Elmo.Collins@nrc.gov)

Deputy Regional Administrator (Art.Howell@nrc.gov)

DRP Director (Kriss.Kennedy@nrc.gov)

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

DRS Director (Anton.Vegel@nrc.gov)

DRS Deputy Director (Vacant)

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

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

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

Project Engineer, DRP/B (Greg.Tutak@nrc.gov)

Project Engineer, DRP/B (Nestor.Makris@nrc.gov)

DC Administrative Assistant (Agnes.Chan@nrc.gov)

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

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

Project Manager (Alan.Wang@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

Inspection Reports/MidCycle and EOC Letters to the following:

ROPreports

Only inspection reports to the following:

OEDO RIV Coordinator (James.Trapp@nrc.gov)

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

S:\DRS\REPORTS DRAFT\DC2011004-RFI-DRR.docx ADAMS ML

ADAMS: No 7 Yes 7 SUNSI Review Complete Reviewer Initials: DRR

7 Publicly Available 7 Non-Sensitive

Non-publicly Available Sensitive

RIV/EB1/RI EB1/RI EB1: Chief

D. Reinert A. Fairbanks R.Latta for TFarnholtz

2/16 /2011 2/16/2011 2/16/2011

/RA/ /RA/ /RA/

OFFICIAL RECORD COPY T=Telephone E=E-mail F=Fax

MANAGEMENT OF GAS ACCUMULATION IN EMERGENCY CORE COOLING, DECAY

HEAT REMOVAL, AND CONTAINMENT SPRAY SYSTEMS TEMPORARY INSTRUCTION

DOCUMENT REQUEST

Inspection Report: 05000275/2011004; 05000323/2011004

Inspection Dates: June 27 - July 1, 2011

Inspection Procedure: TI 2515/177, Management of Gas Accumulation in Emergency

Core Cooling, Decay Heat Removal, and Containment Spray

Systems

Inspector: Dustin Reinert, Reactor Inspector

(817) 860-8244

dustin.reinert@nrc.gov

The following information should be sent to the Region IV office in hard copy or electronic

format (ims.certrec.com or compact disc, preferred), in care of Dustin Reinert, to facilitate the

selection of specific items that will be reviewed during the onsite inspection week. The

inspector will select specific items from the information requested below and then request from

your staff additional documents needed during the onsite inspection weeks. Also, we request

that you categorize the documents in your response with the numbered list below. Please

provide requested documentation electronically if possible. 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. If you have any questions regarding

this information request, please call the inspector as soon as possible.

I. Information Requested By June 6, 2011

1. List of corrective action program documents (with a short description) associated with

Generic Letter (GL) 2008-01, voids in piping, and pressure transients for the previous

three years.

2. List of changes (with a short description and tracking number) to the final safety analysis

report (FSAR), technical specifications, technical specification bases, and technical

requirements manual associated with the resolution of GL 2008-01.

3. List of calculations associated with GL 2008-01, including calculations that have been

changed or created in response to GL 2008-01 (with a short description of the

calculation and the change).

4. List (with a short description) of gas intrusion mechanisms that apply to the plant and the

affected system locations (e.g. identify the source, conditions, and expected void

locations).

5. List of the suction piping sections identified as susceptible to gas accumulation (the list

should identify the corresponding system).

6. List of the discharge piping sections identified as susceptible to gas accumulation (the

list should identify the corresponding system).

1 Enclosure

MANAGEMENT OF GAS ACCUMULATION IN EMERGENCY CORE COOLING, DECAY

HEAT REMOVAL, AND CONTAINMENT SPRAY SYSTEMS TEMPORARY INSTRUCTION

DOCUMENT REQUEST

7. Copies of isometric drawings of the emergency core cooling, residual heat removal, and

containment spray systems (hard-copies are preferred).

8. Copies of piping and instrumentation diagrams (P&IDs) of the emergency core cooling,

residual heat removal, and containment spray systems (hard-copies are preferred).

9. Copies of program documents and procedures developed to implement the resolution of

GL 2008-01.

10. List of actions that were completed in response to GL 2008-01.

11. Copies of the modification packages for hardware modifications as part of the resolution

of GL 2008-01.

12. Design basis documents of the emergency core cooling, residual heat removal, and

containment spray systems.

13. Design basis documents of keep-full systems of the emergency core cooling, residual

heat removal, and containment spray systems.

14. System walkdown reports associated with the resolution of GL 2008-01.

15. If applicable, provide a list of inaccessible locations where plant walkdowns of the

emergency core cooling, residual heat removal, and containment spray systems have

not been completed. Include an explanation of why each area is considered

inaccessible.

16. Copies of surveillance procedures associated with the resolution of GL 2008-01 and the

results of the last two surveillances for the emergency core cooling, residual heat

removal, and containment spray systems.

17. Copies of procedures used for detecting and determining void volumes.

18. Copies of procedures used for filling and venting.

19. Copies of trends of periodic venting results.

20. Copies of the engineering evaluations performed for all identified voids in the past three

years.

21. Basis for the void acceptance criteria (e.g. calculation). If applicable, provide the

justification for any deviation from the void acceptance criteria established by the Office

of Nuclear Reactor Regulation (NRR).

22. Copy of any void transport analyses.

23. Copy of vortexing calculations associated with systems under the scope of GL 2008-01.

24. Copies of self-assessments associated with the implementation of the GL 2008-01

2 Enclosure

MANAGEMENT OF GAS ACCUMULATION IN EMERGENCY CORE COOLING, DECAY

HEAT REMOVAL, AND CONTAINMENT SPRAY SYSTEMS TEMPORARY INSTRUCTION

DOCUMENT REQUEST

program.

II. Information Requested By June 27, 2011

25. Copies of the selected corrective action program documents.

26. Copies of the selected licensing and design basis document changes.

27. Copies of the selected calculations.

28. Copies of training documents that ensure that personnel are aware of gas-related

concerns.

29. Copies of corrective action program implementing procedures.

30. Electronic copies of the current technical specifications, technical specification bases,

final safety analysis report, and technical requirements manual.

Mailing Address:

US NRC Region IV

Attn: Dustin Reinert

612 E. Lamar Blvd., Suite 400

Arlington, TX 76011-4125

3 Enclosure