ML031420528

Bases Revision(S) to the Kewaunee Nuclear Power Plant Technical Specifications

ML031420528
Person / Time
Site:	Kewaunee
Issue date:	05/15/2003
From:	Coutu T Nuclear Management Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NRC-03-055
Download: ML031420528 (2)

Text

N Committed to NuclearExcellence Kewaunee Nuclear Power Plant Operated by Nuclear Management Company, LLC NRC-03-055 10 CFR 50.36 May 15, 2003 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 KEWAUNEE NUCLEAR POWER PLANT DOCKET 50-305 LICENSE No. DPR-43 BASES REVISION(S) TO THE KEWAUNEE NUCLEAR POWER PLANT TECHNICAL SPECIFICATIONS Nuclear Management Company (NMC), licensee for the Kewaunee Nuclear Power Plant (KNPP), hereby submits a revision to the Basis for the Technical Specifications (TS). The change to TS B4.6 is being submitted to clarify the diesel generator timing sequence consistent with Section 8.2 of the approved KNPP Updated Safety Analysis Report (USAR) Revision 17.

In addition, Section TS 84.6 has been converted to WORD format. This administrative conversion includes reformatting the Basis section title, changes to correct punctuation, and other grammatical inconsistencies. The conversion is part of an ongoing effort to standardize KNPP's Technical Specifications.

These changes have been screened for evaluation pursuant to the requirements of 10 CFR 50.59 in accordance with approved KNPP procedures and were determined to be acceptable.

Attached is a copy of revised TS Basis page TS B4.6-1 for your controlled Technical Specifications.

Thomas Coutu Site Vice-President, Kewaunee Plant PRR cc US NRC, Region IlIl US NRC, Senior Resident Inspector Electric Division, PSCW Attachment N490 Highway 42

• Kewaunee, Wisconsin 54216-9510 4PO Telephone: 920.388.2560

RASIS - Priondic Tetingi of Emergency Power Sytems (TS 4 6)

Each diesel generator can start and be ready to accept full load within 10 seconds, and will sequentially start and supply the power requirements for one complete set of engineered safety features equipment in approximately one minute.(') This test will be conducted during each REFUELING outage to ensure that the diesel generator will start and assume required loads in accordance with the timing sequence listed in USAR Table 8.2-1 after the initial starting sequence.

The specified testfrequencies provide reasonable assurance that any mechanical or electrical deficiency will be detected and corrected before it can result in failure of one emergency power supply to respond when called upon to function. I ts possible failure to respond is, of course, anticipated by providing two d iesel g enerators, each supplying through an independent bus, a complete and adequate set of engineered safety features equipment. Further, both diesel generators are provided as backup to multiple sources of external power, and this multiplicity of sources should be considered with regard to adequacy of test frequency.

Monthly Diesel Generator Surveillance (TS 4 6.a.1)

The monthly tests specified for the diesel generators will demonstrate their continued capability to start and carry rated load. The fuel supplies and starting circuits and controls are continuously monitored, and abnormal c onditions i n t hese s ystems w ould b e i ndicated b y a n a larm w ithout need for test startup. Monthly tests are performed in accordance with the intent of IEEE 387-1977, paragraph 6.6.1.

REFUELING Interval Diesel Generator Surveillance (TS 46 a-2)

The REFUELING interval diesel generator surveillance demonstrates that the Emergency Power System, and its control system, will function automatically to provide engineered safety equipment power in the event of loss of off-site power coincident with a safety injection signal. This test demonstrates proper tripping of motor feeder breakers, main supply and tie breakers on the affected bus, and sequential starting of essential equipment to demonstrate OPERABILITY of the diesel generators. This test is initiated by simultaneously unblocking safety injection and simulating a loss-of-voltage signal. This surveillance is performed to meet the intent of IEEE 387-1977 paragraph 6.6.2. (Note also that Reg. Guide 1.108 addresses diesel generator surveillance.)

(1)USAR Section 8.2 TS B4.6-1 05/15/2003