ML18059A934

Proposed Tech Specs Re Instrumentation & Control Section

ML18059A934
Person / Time
Site:	Palisades
Issue date:	04/07/1994
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18059A933	List: ML18059A932 ML18059A934
References
NUDOCS 9404150189
Download: ML18059A934 (2)

Text

ATTACHMENT I Consumers Power Company Palisades Plant Docket 50-255 INSTRUMENTATION AND CONTROL TECHNICAL SPECIFICATION CHANGE REQUEST Additional No Significant Hazards Analysis April 7, 1994 I Page

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Palisades Instrument and Controls Technical Specification Change Request Additional No Significant Hazards Analysis Consumers Power Company finds that activities associated with the February 22, 1994 and March 11,1994 Instrument and Control Technical Specification change revisions include no significant hazards; and accordingly, a no significant hazards determination in accordance with 10CFR50.92(c) is justified. The following summary supports the finding that the proposed change would not:

1. Involve a significant increase in the probability or conseguences of an accident previously evaluated.

Neither the deletion of instrument surveillance requirements for the Safety Injection Tank (SIT) instrumentation nor the addition of allowance of temporarily returning inoperable equipment to service for maintenance or testing would affect the probability or consequences of an accident.

The SIT instrument channels themselves have no accident function. Their only purpose is to allow verification that the SITs themselves are operable. Surveillance requirements for these instruments were purposely deleted from STS during the Technical Specification Improvement Program.

Their removal from Technical Specifications was suggested in GL 93-05.

Returning inoperable equipment to service as allowed by LCO 3.0.5 is necessary if failed channels are to be restored to operable status. The restoration of such channels enhances the ability to monitor for and mitigate abnormal operating conditions and accidents.

Therefore, the proposed changes do not 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.

The proposed changes would not alter the operating conditions of the plant systems, and would not reduce the reliability of any plant safety equipment.

Therefore, this change does not create the possibility of a new or different kind of accident from any accident previously evaluated.

3. Involve a significant reduction in a margin of safety.

The proposed changes would not affect the setpoints, capacities, or operating limits for any equipment. Therefore, the proposed changes do not involve a significant reduction of a margin of safety.