ML111320511

Request for Additional Information, Round 2, License Amendment Request to Correct Non-Conservative Values in Battery Terminal Voltage and Specific Gravity Values in Technical Specification Surveillance Requirements

ML111320511
Person / Time
Site:	Cooper
Issue date:	05/13/2011
From:	Lynnea Wilkins Plant Licensing Branch IV
To:	O'Grady B Nebraska Public Power District (NPPD)
Wilkins, L E, NRR/DORL/LPL4, 415-1377
References
TAC ME4974
Download: ML111320511 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 13, 2011 Mr. Brian J. O'Grady Vice President-Nuclear and CNO Nebraska Public Power District 72676 648A Avenue Brownville, NE 68321 SUB.JECT: COOPER NUCLEAR STATION - REQUEST FOR ADDITIONAL INFORMATION RE: NON-CONSERVATIVE BATTERY TERMINAL VOLTAGE AND SPECIFIC GRAVITY IN TECHNICAL SPECIFICATION SURVEILLANCE REQUIREMENTS (TAC NO. ME4974)

Dear Mr. O'Grady:

By letter dated October 29, 2010 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML103080079), Nebraska Public Power District requested an amendment to Facility Operating License No. DPR-46 for Cooper Nuclear Station (CNS), and Appendix A, Technical Specifications (TSs), of the facility operating license. The proposed changes would revise the battery acceptance criteria in CNS's TS Surveillance Requirement (SR) 3.8.4.1 and TS Table 3.8.6-1. Specifically, the proposed license amendment request would revise the acceptance criteria in the CNS TS SR 3.8.4.1 and TS Table 3.8.6-1 by revising the battery terminal voltage while on float charge and specific gravity acceptance criteria to ensure that the Division I and II safety-related batteries can perform their safety functions and will remain operable during postulated design basis events.

The U.S. Nuclear Regulatory Commission staff has reviewed your submittal and determined that the information specified in the enclosed request for additional information (RAI) is needed for the staff to complete its evaluation. The RAI was discussed with Mr. McCutchen and others of your staff on April 8, 2011. Mr. McCutchen indicated that the response would be provided within 30 days of receipt of this letter.

B. O'Grady -2 If you have any questions, please contact me at 301-415-1377 or via e-mail at Lynnea. wilkins@nrc.gov.

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Lynnea E. Wilkins, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-298

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION DOCKET NO. 50-298 By letter dated October 29, 2010 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML103080079), Nebraska Public Power District requested an amendment to Facility Operating License No. DPR-46 for Cooper Nuclear Station (CNS), and Appendix A, Technical Specifications (TSs), of the facility operating license. The proposed changes would revise the battery acceptance criteria in CNS's TS Surveillance Requirement (SR) 3.8.4.1 and TS Table 3.8.6-1. Specifically, the proposed license amendment request (LAR) would revise the acceptance criteria in the CNS TS SR 3.8.4.1 and TS Table 3.8.6-1 by revising the battery terminal voltage while on float charge and specific gravity acceptance criteria to ensure that the Division I and II safety-related batteries can perform their safety functions and will remain operable during postulated design basis events.

The NRC staff has reviewed and evaluated the information provided by the licensee and has determined that the following information is needed in order to complete its review of the relief request.

The following request for additional information pertains to the proposed changes to the direct current (DC) battery terminal voltage while on float charge and specific gravity acceptance values in the TS SR 3.8.4.1 and TS Table 3.8.6-1:

1. In its LAR, the licensee proposed revising the battery terminal voltage acceptance criteria for the Division I and II safety-related batteries. However, the associated battery charger output voltage acceptance criteria in TS SR 3.8.4.6 were not proposed to be revised. Please provide justification for not proposing a revision to the corresponding TS SR 3.8.4.6 for the battery charger.

2. Please describe how the manufacturer quantified a capacity of 96 percent of rated from an average specific gravity of 1.205.

3. Please provide the technical justification for the proposed Category B specific gravity limit of 1.200.

4. Please state if CNS is using a nuclear qualified version of electrical power systems design, Simulation, and analytic software.

5. Please provide a summary of the analysis that shows how CNS found that the DC systems were capable of meeting requirements for safe shutdown and for maintaining the plant in a safe shutdown mode as well as meeting the requirements for station blackout and Appendix R of Title 10 of the Code of Federal Regulations (10 CFR) Part 50.

Enclosure

ML111320511 *via memo dated

~E NRR/LPL4/PM LWilkins NRR/LPL4/LA J8urkhardt NRR/DE/EEEB/BC RMathew*

NRR/LPL4/BC MMarkley NRR/LPL4fPM LWilkins II DATE 5/13f11 5f13f11 3f11 f2011 5/13/11 5/13/11