ML16148B075

Requests Response to Listed Issues to Complete Review of Licensee Proposed Changes to Plant TS Submitted in ,To Encompass Operability & Surveillance Requirements for Ssf

ML16148B075
Person / Time
Site:	Oconee
Issue date:	11/08/1991
From:	Weins L Office of Nuclear Reactor Regulation
To:	Hampton J DUKE POWER CO.
References
TAC-M66390, TAC-M66391, TAC-M66392, NUDOCS 9111250102
Download: ML16148B075 (4)

Text

REo1 9, UNITED STATES NUCLEAR REGULATORY COMMISSION o

WASHINGTON, D. C. 20555 November 8, 1991 Docket Nos. 50-269, 50-270 and 50-287 Mr. J. W. Hampton Vice President, Oconee Site Duke Power Company P. 0. Box 1439 Seneca, South Carolina 29679

SUBJECT:

OCONEE UNITS 1, 2, AND 3 - TECHNICAL SPECIFICATIONS FOR STANDBY SHUTDOWN FACILITY POWER SYSTEM (TAC NOS. M66390/M66391/M66392)

In a July 26, 1985, letter, Duke Power Company (DPC) proposed changes to the plants' Technical Specifications to encompass operability and surveillance requirements for the Standby Shutdown Facility (SSF). Revisions to the proposed technical specification amendment were provided in letters dated August 14, 1987, August 12, 1988, August 21, 1990, and March 5, 1991. In order to complete our review, your response to the following issues is requested:

1. Current Standard Technical Specifications (STS) require that diesel generators be load tested for at least 60 minutes every month. Proposed Specification 4.20.3.a.2.a requires this quarterly. DPC should address/

justify this departure from the guidance contained in STS's and Regulatory Guide (RG) 1.108, "Periodic Testing of Diesel Generator Units Used As Onsite Electric Power Systems At Nuclear Power Plants."

The above tests are used to calculate reliability levels for emergency sources in responding to the Station Blackout (SBO) Rule as specified in RG 1.155.

DPC should address how the proposed testing interval establishes equiva lent reliability and confidence in the alternate AC (AAC) source.

2. Current S's T

equire that diesel generators be tested every 18 months t~;vtrffy their capability to reject a load no less than their largest fngie-emergency load and to reject their full load, and to ver they!can operate for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> (22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> at their 'cdntinuous loid rating, 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> at their 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rating). Since the proposed Technical Specifications do not contain these surveillance requirements for the SSF power system, DPC should address/justify this departure from the guidance contained in current STS's and RG 1.108. DPC should also address these tests in relation to the use of the SSF power source as the AAC source for SBO.

911 1250102 91110B MRC HLEt CENTR8 P PDR ADOCK 05000269 P

PDR

Mr. J. November 8, 1991

3. Current STS's require that the individual cell and total battery terminal voltages be measured under float conditions every 92 days. Also, the electrolyte level for each cell should be measured and the average cell electrolyte temperature (for a representative number of cells) should be calculated. Proposed Specification 4.20.3.b.2, containing the quarterly surveillance requirements for the SSF dc system, does not include these requirements. DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations" (as endorsed by RG 1.129, "Maintenance, Testing, and Replacement Of Large Lead Storage Batteries For Nuclear Power Plants").

4. Specification 4.20.3.b.3 contains the proposed annual surveillance require ments for the SSF dc system. In paragraph a. "batteries" should be replaced with "cells" and in paragraph b. "battery to battery" should be replaced with "cell-to-cell." Also, this specification does not contain the requirement to verify the resistance for battery connections. DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975 as pertaining to annual battery connection resistance measurements.

5. Current STS's require a battery charger performance test every 18 months and a battery performance discharge test every 60 months. Since the proposed Technical Specifications do not contain these surveillance requirements, DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975.

6. Specification 4.20.3.b.4 contains the proposed annual one hour discharge service test for the SSF batteries. The duration and load for this test should be based upon the plant's limiting SBO or standby shutdown require ments.

This requirement affects fewer than ten respondents, and therefore, is not subject to Office of Management & Budget review under P.L.96-511.

Sincerely,

/s/

Leonard A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page DISTRIBUTION:

LReyes, RH ACRS (10), P-315 Oconee R/F Docket File SVarga EMcKenna LWiens NRC & Local PDRs GLainas OGC, 15B18 PD 11-3 R/F LBerry EJordan, MNBB3701 PDII-3:LA PDT &PM D

-3 LBerry LWiens:cw EMcKenna fl/1/91 jj /?/91 p/ //91 DOCUMENT NAME: OCONEE LTR M66390/1/2

Mr. J. November 8, 1991

3. Current STS's require that the individual cell and total battery terminal voltages be measured under float conditions every 92 days. Also the electrolyte level for each cell should be measured and the average cell electrolyte temperature (for a representative number of cells) should be calculated. Proposed Specification 4.20.3.b.2, containing the quarterly surveillance requirements for the SSF dc system, does not include these requirements. DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations" (as endorsed by RG 1.129, "Maintenance, Testing, and Replacement of Large Lead Storage Batteries For Nuclear Power Plants").

4. Specification 4.20.3.b.3 contains the proposed annual surveillance require ments for the SSF dc system. In paragraph a. "batteries" should be replaced with "cells" and in paragraph b. "battery to battery" should be replaced with "cell-to-cell." Also, this specification does not contain the requirement to verify the resistance for battery connections. DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975 as pertaining to annual battery connection resistance measurements.

5. Current STS's require a battery charger performance test every 18 months and a battery performance discharge test every 60 months. Since the proposed Technical Specifications do not contain these surveillance requirements, DPC should address/justify this departure from the guidance contained in current STS's and IEEE Std. 450-1975.

6. Specification 4.20.3.b.4 contains the proposed annual one hour discharge service test for the SSF batteries. The duration and load for this test should be based upon the plant's limiting SBO or standby shutdown require ments.

This requirement affects fewer than ten respondents, and therefore, is not subject to Office of Management & Budget review under P.L.96-511.

Sincerely, Leonard A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc: See next page

Mr. J. W. Hampton Duke Power Company Oconee Nuclear Station cc:

Mr. A. V. Carr, Esq.

Mr. M. E. Patrick Duke Power Company Compliance 422 South Church Street Duke Power Company Charlotte, North Carolina 28242-0001 Oconee Nuclear Site P.O. Box 1439 Seneca, South Carolina 29679 J. Michael McGarry, III, Esq.

Winston and Strawn Mr. Alan R. Herdt, Chief 1400 L Street, NW.

Project Branch #3 Washington, DC 20005 U. S. Nuclear Regulatory Commission 101 Marietta Street, NW., Suite 2900 Mr. Robert B. Borsum Atlanta, Georgia 30323 Babcock & Wilcox Nuclear Power Division Ms. Karen E. Long Suite 525 Assistant Attorney General 1700 Rockville Pike N. C. Department of Justice Rockville, Maryland 20852 P.O. Box 629 Raleigh, North Carolina 27602 Manager, LIS NUS Corporation Mr. R. L. Gill, Jr.

2650 McCormick Drive, 3 Floor Licensing Clearwater, Florida 34619-1035 Duke Power Company P. 0. Box 1007 Senior Resident Inspector Charlotte, North Carolina 28201-1007 U. S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Marietta Street, NW., Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina-Department of Health and Environmental Control 2600 Bull Streit Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 County Supervisor of Oconee County Walhalla, South Carolina 29621