ML20198Q941

Proposed Tech Specs Bases Section 3/4.8.1,3/4.8.2 & 3/4.8.3 for Installation of Spare Battery Chargers

ML20198Q941
Person / Time
Site:	Wolf Creek
Issue date:	11/06/1997
From:	WOLF CREEK NUCLEAR OPERATING CORP.
To:
Shared Package
ML20198Q436	List: ML20198Q432 ML20198Q941
References
NUDOCS 9711130096
Download: ML20198Q941 (2)

Text

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. . Attachment 11 to ET 97-0130 2

, M s f fkTRICAL Pow e SYSTEMS

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334.a.1. 314.3.1. " 2/4.a.3 A.C. m w rt. D.C. m

• EE mn nutITE POWER LDLLELE 4

The OPERABILITY of the A.C. and D.C power sources and acsociated distri-I bution systems during operation ensures that sufficient power will be avail-1 able to scpply the safety-related equipment required for:the udtmitigation condi- and contro 4

doenofthefacilityIlity.and tions within the fac (2)he T minimum specified indepenhnt and rededant

A.C. and D.C. power sources and distribution systems satisfy the muirements

of General Design Criterion 17 of Appendix A te 10 CFR Part 50.

. The ACTION requirements specificd for the levels of degradation of the i power sources provide restriction upon continued facility oper: tion commen-4 surate with the level of degradation. The OPERABILITY of tte power sources i are consistent with the initial condition assumption:, of the safety steafyses and are based upon maintaining at least one redundant set of onsite A C. ane D.C. power sources and associated distribution systems OPERABLE d c1*g scel-

! dont conditions coincident with an assi d loss-of-offsite power and single failure of the other onsite A.C. sou... The A.C. source and D.C. source l allowsble out-of-service times are based on Regulatsry Guide 1.93 1 ' Availability of Electrical Power sources

• December 1974. When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems, trains components and devices, that 1

depend on the remaining OPERABLE diesel genera, tor as a source of emergency power, are also OPERABLE, and that the steam-driven auxiliary feedwater pump is OPERABLE. This requirement is intended to provide assurance that a less-of-offsite power event will not result in a complete loss of safety function of critical systems during the pericd one of the diesel generators is inoperable. The ters versfy as used in this context means to administrat tvaly check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons. It does not mean to perfore tM Surveillance Requirements needed to demonstrate the OPERABILITY of the component.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associtted distribution systems during shutdown and refuelino ensures that:

(1) the facility can be maintained in the shutdown or refuel' ng conditier, for extended time periods, and (I) sufficient instrumentation and control capability are available for monitoring and maintaining the unit status.

• When determining compliance with 4ction statement requirements, addition to the RCS of borated water with a ec. centration greater than or equal to the minimum required RWST concentration shall not be considered to be a positive reactivity change.

The surveillance requirements of Technical Specification 3/4.8.1 are based upon, in part, the guidance of Generic Letter 94-01, ' Removal of Accelerated Testing and tal Reporting Requirements for Emergency Diesel Generators from Plant Tec ical Specifications,' Generic Letter 93-05, 'Line-Item Technical Specifications improvements to Reva nce surveillance Requirement for Testing During Power Operation," Regulatory Guide 1.9, '5 election, Design, Qualificatson, and Testing of Emergency Diesel Generator Units Used as Class 1E Onsite Electrical Power Systems at Nuclear Power Plants," Revision 3, and I

WOLF CREEK - UNIT 1 B 3/4 8-1 Amendment No. SvMr46,101 l

November 22, 1993 Y ?tM b N W 4pm ea I P j J - -.u

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Attachment II to ET 97-0130 Page 3 of 3 INSERT A A D.C. electrical source consists of a battery bank, associated full capacity charger and the D.C. bus. The associated full capscity charger is the charger that is supplying power to the bus and battery bank (NK21 for NK11, NK23 for IJK13, NK22 f or NK12, NK 24 for NK14) or (NK25 for NK11 or NK13 or NK26 for I:K12 or NK14). LCO J.8.2.1 and 3.8.2.2 are met by restoring the required full capacity charger ts OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> by either 1) providing the normal supply to its associated battery bank and bus or 2) by supplying the battery bank aru bus using the spare charger (powered from its safety-related bus) in that train. The spare charger is maintained energized (except during maintenance activities) when not in service to allow immediate (< 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />) alignment to tne battery bank and bus when the associated full capacity charger is inoperable. Surveillance Requirement 4.8.2.la applies only to those chargers connected to a battery bank and bus. The preferred D.C.

electrical source alignment consists of the normal chargers (NK21, NK22, NK23 and NK24) supplying the associated battery bank and bus.

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