ML20215A967

From kanterella
Jump to navigation Jump to search
SER Re Util 851207 Proposed Changes to Tech Specs Pertaining to Reactor Trip Sys Instrumentation & Surveillance,Per Generic Ltr 85-09.Proposed Tech Specs Should Be Submitted for Review,Per Generic Ltr.Salp Input Also Encl
ML20215A967
Person / Time
Site: Mcguire, Vogtle, McGuire, 05000000
Issue date: 05/22/1986
From:
NRC
To:
Shared Package
ML20213E629 List:
References
GL-85-09, GL-85-9, NUDOCS 8612110461
Download: ML20215A967 (3)


Text

, . .

4 SAFETY EVALUATION REPORT i

TECHNICAL SPECIFICATION CHANGE (MPA B-90)

MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 INTRODUCTION By letter dated December 7, 1985, Duke' Power Company proposed changes to the McGuire Technical Specifications pertaining to Reaqtor Trip System Instrumentation and Surveillance in response to Generic Letter 85-09 (MPA B-90). Generic Letter 85-09 concluded that Technical Specification changes should be proposed by licensees to explicitly require independent testing of the undervoltage and shunt trip attachments of the reactor trip breakers during power operation, testing of bypass breakers prior to use, and independent testing of the control room manual switch contacts and wiring during each refueling outage.

EVALUATION Duke Power Company's proposed Technical Specification changes are consistent with those specified in Generic Letter 85-09, except as indicated below by items 1 and 2.

1. No provision is included for testing of the Reactor Trip Bypass Breaker prior to each time it is put into service.

~

, 2. No provision is ' included for verifying the operability of the Bypass Breaker trip circuits each refueling outage.

The licensee has declined to provide Technical Specifications for the above items on the basis that there is no significant benefit to be expected from inclusion of Bypass Trip Breaker testing in the Technical Specifications.

This is not acceptable to the NRC staff. When a reactor trip breaker is tested, the reactor trip bypass breaker is put into service as a backup. The Generic Letter 85-09 Technical Specifications specify a manual test of the B612110461 861205 PDR A ADOCK 05000424 PDR

-= . .-.

-2 bypass breaker prior to putting it into service. This testing is a simple procedure and it is prudent to do this, test before relying on this breaker as a backup to the remaining reactor trip' breaker. Although the licensee states that probabilistic risk analyses (PRAs) show that testing of the breaker has an insignificant affect on the overall reliability, no claim is made that the reliability is decreased or that the bypass breaker is not safety related.

Therefore, we believe that these tests should be made as specified in Generic Letter 85-09.

We find the remaining Techncial Specification changes proposed by Duke Power Company to be consistent with Generic Letter 85-09 and therefore acceptable.

CONCLUSION We find the Technical Specification changes propnsed by Duke Power Company for the McGuire Nuclear Station, Units 1 and 2 to be acceptable except that the licensee has declined to provide proposed Technical Specifications to provide for testing of the Reactor Trip Bypass Breakers and associated circuitry. The licensee should submit for staff review proposed Technical Specifications for this purpose as indicated in Generic Letter 85-09.

l l

)

' ' ENCLUbUNt i

ICSB SALP IllPUT , ,

PLANT: McGuire, Units 1 and 2 Technical Specification Change, MPA B-90 i

SUBJECT:

DASIS PERFORitANCE i EVALUATION

' CATEGORY CRITERIA .

N/A No basis for assessment.

) Management l , involvement . . .

Licensee takes issue with some items of G.L. 85-09. Provides basis

. Approach to 2 for doing so. .

Resolution of -

Technical Issues _

2 Response was adequate for issues accepted.

i

... Responsiveness s

1 N/A No basis for assessment. ,

1. Enforcement .

illstory

. ~

N/A No basis for assessment.

i j 5. Reportable Events No basis for assessment. ,

6. StaffinD N/A N/A No basis for assessment. .
7. Train.ing
  • l