ML20043F939

Forwards Revised Bases Pages to Tech Spec 3/4.8, Electrical Power Sys, Inadvertently Omitted from NRC

ML20043F939
Person / Time
Site:	Brunswick
Issue date:	06/13/1990
From:	Le N Office of Nuclear Reactor Regulation
To:	Eury L CAROLINA POWER & LIGHT CO.
References
TAC-76089, TAC-76090, NUDOCS 9006180334
Download: ML20043F939 (5)

Text

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3 Docket Nos. 50-325 and 50-324 Mr. Lynn Eury Executive Vice President

' Power Supply Carolina Power & Light Co.

Post Office Box 1551 Raleigh, North Carolina 27602

SUBJECT:

EVALVATION OF BASES SECTION OF TECHNICAL SPECIFICATION 3/4.8 EMERGENCY DIESEL GENERATOR SURVEILLANCE - BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 (TAC NOS.

76089AND76090)

By letter dated May 10, 1990, the staff appioved your February 23 1990 request for a change to the Bases section of Techni:a1 Specification (TS),3/4.8,

" Electrical Power System." The change was to clarify Surveillance Requirement 4.8.1.1.2.d at Brunswick Steam Electric Plant, Units 1 and 2.

The revised Bases pages inadvertently were not included as an enclosure to the staff's May 10, 1990 letter.

Enclosed, please find the revisad Bases pages for both Units. We regretted any inconvenience that this may have caused you.

Sincerely, Orignal sianed By:

Ngoc B. Le,' Project Manager Project Directorate 11-1 Division of Reactor Projects. 1/11 Office of Nuclear Reactor Regulation

Enclosures:

As stated cc w/ enclosures:

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3/4.8 ELECTRICAL POWER SYSTEMS BASES l

The OPERABILITY of the A.C. and D. C. power sources and associated distribution systems during operation ensures that suf ficient 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. 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 maintain 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 shutdawn" implies that this testing may be performed by the normal-power switching evolutions during unit shutdown or while shutdown.

The requirement of Specification 4.8.1.1.2.d to demonstrate the OPERABILITY of each diesel generator at least once per 18 months during shutdown may be satisfied by performing the required surveillances on diesel generators number 1 and 2 while Brunswick Unit 1 is shutdown, and diesel generators number 3 and 4 while Brunswick Unit 2 is shutdown. While performing the required survelliances of a given diesel generator, the loads associated with that diesel generator are subject to the Limiting Condition for Operation requirements for each system or component that obtains its emergency power from that diesel generator.

1 BRUNSWICK - UNIT 1 B 3/4 8-1

9 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 j

shutdown of the facility and 2) the mitigation and control of sccident conditions within the facility. The minimum specified independent and

-l 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 f acility operation consnensurate 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 upan 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 f acility can be maintained in the shutdown or refueling condition for extended time periods and 2) suf ficient instruc:entation and control capability is available for monitoring and maintain 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.

i The requirement of Specification 4.8.1.1.2.d to demonstrate the l

OPERABILITY of each diesel generator at least once per 18 months during shutdown may be satisfied by performing the required surveillances on diesel-generators number 1 and 2 while Brunswick Unit 1 is shutdown, and diesel generators number 3 and 4 while Brunswick Unit 2 is shutdown. While y

performing the required surveillances of a given diesel generator, the loads

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associated with that diesel generator are subject to the Limiting Condition for Operation requirements for each system or component that obtains its emergency power from that diesel generator.

l BRUNSWICK - UNIT 2 B 3/4 8-1 l-I

Mr. L. W. Eury Brunswick Steam Electric Plant Carolina Power & Light Company Units 1 and 2 cc:

Mr. Russell B. Starkey, Jr.

Mr. H. A. Cole Vice President Special Deputy Attorney General Brunswick Nuclear Project State of North Carolina P. O. Box 104?9 P. O. Box 629 Southport, North Carolina 28461 Raleigh, North Carolina 27602 Mr. R. E. Jones, General Counsel Mr. Robert P. Gruber i

Carolina Power & Light Company Executive Director P. O. Box 1551 Public Staff - NCUC Raleigh, North Carolina 27602 P. O. Box 29520 Raleigh, North Carolina 27626-0520 Ms. Frankie Rabon Board of Commissioners P. O. Box 249 Bolivit, North Carolina 28422 Resident Inspector U. S. Nuclear Regulatory Commission Star Route 1 P. O. Box 208 Southport, florth Carolina 28461 Regional Administrator, Region II U. S. Nuclear Regulatory Commission 101 Parietta Street, Suite ?900 Atlanta, Georgia 30323 Mr. Dayne H. Brown, Director Division of Radiation Protection N. C. Department of Environmental, Commerce and Natural Resources P. O. Bcx 27687 Raleigh, North Carolina 27611-7687 Mr. J. L. Harness Plant General Manager Brunswick Steam Electric Plant P. O. Box 10429 Southport, North Carolina 28461

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