ML20246E673

Proposed Tech Specs Page B 3/4 8-1 Re Alternate/Normal Power Testing

ML20246E673
Person / Time
Site:	Brunswick
Issue date:	05/01/1989
From:	CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20245K703	List: ML20245K700 ML20246E673
References
NUDOCS 8905110328
Download: ML20246E673 (4)

Text

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ENCLOSURE 1 BRUNSWICK STEAM ELECTRIC PLANT, UNIT 1 PROPOSED BASES PAGE (NRC TAC NOS 67944 AND 67945) f i

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l-3/4.8 ELECTRICAL POWER SYSTEMS  !

1 BASES The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety-related equipment required for 1) the safe j shutdown of the facility and.2) the mitigation and control of accident {

conditions within the facility. The minimum specified independent and 1 redundant A.C. and D.C. power sources and distribution systems satisfy the I requirements of General-Design Criteria 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the i power sources provide restriction upon continued facility operation l commensurate with the level of degradation. The OPERABILITY of the power I

sources is consistent with the initial condition assumptions of the accident au lyses and is based upon maintaining at least one of each of the onsite A.C.

and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution. systems during shutdown and refueling ensures that

1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the facility status. '

The requirement of Specification 4.8.1.1.1.b to demonstrate the '

operability of the independent circuits between the offsite transmission network and the onsite Class 1E distribution system may be satisfied by transferring unit loads from the unit auxiliary transformer (UAT) to the start-up auxiliary transformer (SAT). The requirement to perform this demonstration "during shutdown" implies that this testing may be performed by the_ normal power switching evolutions during unit shutdown or while shutdown.

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BRUNSWICK - UNIT 1 B 3/4 8-1 Amendment No.

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ENCLOSURE 2 J

1 1 I BRUNSWICK STEAM ELECTRIC PLANT, UNIT 2 ^

PROPOSED BASES PAGE '

i (NRC TAC NOS, 67944 AND 67945)

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_ _ _ _ _ . . _ _ _ _ _ _ _ _ _ _ _ . . . _ _ . _ _ _ _ ___ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ . _ . _ _ _ _ _ _ _ . _ . _ _ _ _ _ _ _ _________________________.__.___..__________________)

i 3/4.8 ELECTRICAL POWER SYSTEMS BASES The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety-related equipment required for 1) the safe shutdown of the facility, and 2) the mitigation and control of accident conditions within the facility. The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criteria 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources is consistent with the initial condition assumptions of the accident analyses and is based upon maintaining at least one of each of the onsite A.C.

and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. pawer sources and associated distribution systems during shutdown and refueling ensures that

1) the facility can be maintained in the shutdown or refueling condition for extended time periods, and 2) sufficient instrumentation and control capability is available for monitoring and maintaining the facility status.

The requirement of Specification 4.8.1.1.1.b to demonstrate the operability of the independent circuits between the offsite transmission networ' and the onsite Class 1E distribution system may be satisfied by transferring unit loads from the unit auxiliary transformer (UAT) to the start-up auxiliary transformer (SAT). The requirement to perform this demonstration "during shutdown" implies that this testing may be performed by the normal power switching evolutions during unit shutdown or while shutdown.

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i BRUNSWICK - UNIT 2 B 3/4 8-1 Amendment No.

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