ML101020489

E-Mail, Request for Additional Information Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal and Containment Spray Systems

ML101020489
Person / Time
Site:	Surry
Issue date:	04/12/2010
From:	V Sreenivas Plant Licensing Branch II
To:	Heacock D Dominion, Virginia Electric & Power Co (VEPCO)
Cotton K R, NRR/DORL, 301-415-1438
References
GL-08-001, TAC MD7884, TAC MD7885
Download: ML101020489 (2)

Text

From:

Sreenivas, V To:

"david.heacock@dom.com" Cc:

"david.sommers@dom.com"; "Gary D Miller"; Kulesa, Gloria; Cotton, Karen

Subject:

SURRY:REQUEST FOR ADDITIONAL INFORMATION -GENERIC LETTER 2008-01, "MANAGING GAS ACCUMULATION IN EMERGENCY CORE COOLING, DECAY HEAT REMOVAL, AND CONTAINMENT SPRAY SYSTEMS" (TAC NUMBERS MD7884 and MD7885)

Date:

Monday, April 12, 2010 12:52:00 PM REQUEST FOR ADDITIONAL INFORMATION (RAI) FOR SURRY POWER STATIONS By letters dated October 14, 2008 (Agencywide Document Access and Management System Accession No. ML092360423), November 3, 2008, (ML0830900652), and July 6,

2009, (ML09187130720), Virginia Electric Power Company (the licensee), submitted information in response to Generic Letter (GL) 2008-01 Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, for Surry Units 1 and 2. On the basis of the provided information, the NRC Staff has concluded that additional information is required to determine that the licensee has acceptably demonstrated that the subject systems are in compliance with the current licensing and design bases and applicable egulatory requirements, and that suitable design, operational, and testing control measures are in place for maintaining this compliance as stated in GL 2008-01. Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications. The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAIs:

1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01.

2. Consistent with Section 3.5.2 of Ref 1:

a. describe surveillance coverage and frequency;

b. where venting is accomplished, briefly describe how volumes are determined and provide estimated void volume determination uncertainty;

c. describe any instructions for sampling and chemical analysis of accumulated gas.

3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.

4. Consistent with Section 3.7 of Ref. 1, briefly discuss the training that is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL.

5. Please describe the alternate monitoring methodology discussed in Ref. 3. Describe how pump start pressure transient recording, thermal relief valve monitoring, pump discharge header temperature monitoring, and RWST level trending will be used to monitor for gas.

References

1. Ruland, William H., Preliminary Assessment of Responses to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and

Containment Spray Systems, and Future NRC Staff Review Plans, NRC letter to James H.

Riley, Nuclear Energy Institute, ML091390637, May 28, 2009.

2. Riley, James H., GL 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template, Letter to Administrative Points of Contact from Director, Engineering, Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, Generic Letter 2008-01 Response Guidance, March 20, 2008.

3. Price, J. Alan, Nine Month Response to NRC GL 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, Letter from Vice President, Nuclear Engineering, Virginia Electric and Power Company (Dominion) ML082890094, October 14, 2008.

Please submit the docketed response to these RAI's by June 9, 2010. If you have any questions, please contact Karen Cotton at 301-415-1438.

V. Sreenivas, PH.D., C.P.M.,

Project Manager, LPL2-1, Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation