ML20205M327

Requests Fr Publication of Notice of Consideration of Issuance of Amend to License DPR-34 & Proposed NSHC Determination & Opportunity for Hearing Re 860924 Request Concerning Loss of Offsite Power Test

ML20205M327
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/30/1987
From:	Berkow H Office of Nuclear Reactor Regulation
To:	NRC
References
TAC-63029, NUDOCS 8704020344
Download: ML20205M327 (3)

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WASHINGTON. D C. 20555 8 March 30, 1987 k ....+ o Docket No. 50-267 MEMORANDUM FOR: Sholly Coordinator FROM: Herbert N. Berkow, Director Standardization and Special Projects Directorate Division of PWR Licensing-B

SUBJECT:

REQUEST FOR PUBLICATION IN BIWEEKLY FR NOTICE - NOTICE OF CONSIDERATION OF ISSUANCE OF AMENDMENT TO FACILITY OPERATING LICENSE AND PROPOSED NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION AND OPPORTUNITY FOR A HEARING Public Service Company of Colorado, Docket No. 50-267, Fort St. Vrain Nuclear Generatino Station, Platteville, Colorado Date of amendment request: September 24, 1986 Description of amendment reouest: This proposed change separates the " loss of off-site power" test described in Surveillance Requirement 5.6.1 into two portions. In one portion of the test, the automatic start feature of the diesel generator is tested. In the second portion, the load sequencers are tested. The purpose of this change is to improve plant reliability by not introducing transients into the electrical power system during plant operation.

Basis for proposed no significant hazards consideration determination:

Neither the probability nor consequences of accidents previously evaluated have been affected by this proposed Technical Specification change. The frequency of performing the presently required surveillance is reduced from twice annually to once per refueling cycle. The emergency diesel generator surveillance verifying automatic start and run features, but not requiring load shedding and subsequent reenergization of loads, is still proposed to be performed twice annually. Thus, emergency generator operability is affirmed semiannually by proper operation of the loss of power sensing circuits and auto-start capability.

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The possibility of a new or different kind of accident from those previously evaluated has not been introduced. The proposed testing still l l

verifies diesel generator operability using previously used and understcod '

tests, but reduces the frequency of power disruptions to essential loads.

No margins of safety have been reduced as a result of the proposed surveillance changes. The proposed changes in surveillance testing involve testing already performed with well understood effects on the plant.  !

l Based on the evaluation provided above, it is the staff's initial i detemination that operation of Fort St. Vrain in accordance with the proposed changes will not: (1)involveasignificantincreaseinthe probability or consequences of.an accident previously evaluated; (2) create the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant reduction in any margin of safety. Therefore, the staff proposes to determine that this proposed change would involve no significant hazards consideration.

Local Public Document Room location: Greeley Public Library, City Complex Building, Greeley, Colorado Attorney for licensee: Bryant O'Donnell, Public Service Company of Colorado, P. O. Box 840, Denver, Colorado 80201-0840 NRC Project Director: Herbert N. Berkow in 8  %

/ Herb rt N. Berkow, frector Standardization & Special Projects Directorate Division of PWR Licensing-B cc: K. Heitner P. Noonan l

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f .7' March 30, 1987 The possibility of a new or different kind of accident from those previously evaluated has not been introduced. The proposed testing still verifies diesel generator operability using previously used and understood- ,

tests, but reduces the frequency of power disruptions to essential loads.

No margins of safety have been reduced as a result'of the proposed l surveillance changes. The proposed changes in surveillance testing involve testing already performed with well understood effects on the plant.

Based on the evaluation provided above, it is the staff's initial determination that operation of Fort St. Vrain in accordance with the proposed changes will not: (1) involve a significant increase in the probability or consequences of an accident previously evaluated; (2) create the possibility of a new or different kind of accident from any accident previously evaluated, or (3) involve a significant reduction in any margin of safety. Therefore, the staff proposes to determine that this proposed i

change would involve no significant hazards consideration.

Local Public Document Room location: Greeley Public Library, City Complex Building, Greeley, Colorado l

I Attorney for licensee: Bryant O'Donnell, Public Service Company of Colorado, P. O. Box 840, Denver, Colorado 80201-0840 NRC Project Director: Herbert N. Berkow original signed by Herbert N. Berkow, Director Standardization & Special Projects Directorate l Division of PWR Licensing-B cc: K. Heitner P. Noonan DISTRIBUTION:

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