ML11181A076

Notification of Inspection (NRC Inspection Report 05000445/2011004, 05000446/2011004) and Request for Information

ML11181A076
Person / Time
Site:	Comanche Peak
Issue date:	06/30/2011
From:	Thomas Farnholtz Region 4 Engineering Branch 1
To:	Flores R Luminant Generation Co
References
IR-11-004
Download: ML11181A076 (5)

See also: IR 05000445/2011004

Text

UNITED STATES

NUCLEAR REGULATORY COMMISSION

REGION IV

Rafael Flores, Senior Vice President

and Chief Nuclear Officer

Luminant Generation Company LLC

Comanche Peak Nuclear Power Plant

P.O. Box 1002

Glen Rose, TX 76043

612 EAST LAMAR BLVD, SUITE 400

ARLINGTON, TEXAS 76011-4125

June 30, 2011

SUBJECT: COMANCHE PEAK NUCLEAR POWER PLANT, UNITS 1 AND 2 -

NOTIFICATION OF INSPECTION (NRC INSPECTION REPORT

05000445/2011004; 05000446/2011004) AND REQUEST FOR INFORMATION

Dear Mr. Flores:

On August 15, 2011, the U.S. Nuclear Regulatory Commission (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 Comanche Peak

Nuclear Power Plant, Units 1 and 2. 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 August 1, 2011. Upon review of

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

By August 10, 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 August 15, 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 Gary Merka of your licensing organization.

If there are any questions about this inspection or the materia! requested, please contact the

inspector, Matt Young, at 817-276-6545 or by email at '-'-==:.J:-==~=~='

- 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

(the Public Electronic Reading Room).

Dockets: 50-445; 50-446

Licenses: NPF-87; NPF-89

Thomas R. Farnholtz, Chief

Engineering Branch 1

Division of Reactor Safety

Enclosure: Management of Gas Accumulation in Emergency Core Cooling, Decay Heat

Removal, and Containment Spray Systems Temporary Instruction Document Request

cc w/encl:

Distribution via ListServ for Comanche Peak

MANAGEMENT OF GAS ACCUMULATION IN EMERGENCY CORE COOLING, DECAY

HEAT REMOVAL, AND CONTAINMENT SPRAY SYSTEMS TEMPORARY INSTRUCTION

DOCUMENT REQUEST

inspection Report:

On-site Inspection Dates:

Inspection Procedure:

Lead InspectorlTeam Leader:

05000445/2011004; 05000446/2011004

August 15-19, 2011

TI 2515/177, "Management of Gas Accumulation in

Emergency Core Cooling, Decay Heat Removal, and

Containment Spray Systems"

Matt Young

817 -276-6545

Matt.young@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 Matt Young, 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 August 1, 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).

- 1 -

Enclosure

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

list should identify the corresponding system).

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.

- 2 -

Enclosure

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

program.

II. Information Requested By August 15,2011

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.

- 3 -

Enclosure