ML17250A666

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Responds to IE Bulletin 80-20.Westinghouse Type W-2 Control Switches Are Used in safety-related Applications.Proposed Wiring Change to Monitor Neutral Contact Is Being Processed. Continuity Tests Will Be Performed Every 31 Days
ML17250A666
Person / Time
Site: Ginna Constellation icon.png
Issue date: 09/10/1980
From: White L
ROCHESTER GAS & ELECTRIC CORP.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-80-20, NUDOCS 8010010831
Download: ML17250A666 (4)


Text

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ROCHESTER GAS AND ELECTRIC CORF'ORATION ~ 89 EAST AVENUE, ROCHESTER, N.Y. 14649 LEON D, WHITE, JR. T C L C P H 0 '4 C YICC PRCSIDCNT Attce conc 2te 546 2700 September 10, 1980 Mr. Boyce H. Grier, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

IE Bulletin No. 80-20, Failures of Westinghouse Type W-2 Spring Return to Neutral, Control Switches R. E. Ginna Nuclear Power Plant, Unit 41 Docket I4 ~50-24

Dear Mr. Grier:

In response to Inspection and Enforcement Bulletin 80-20 dated July 31, 1980, concerning W-2 control switches at Zion Generating Station, Unit 1, a review was performed at Ginna Station to determine if Westing-house type W-2 Control Switches, with spring return to neutral position, are used in safety-related applications.

The results of this review have identified. the use of the above mentioned switch in the control circuit of the following safety-related

'breakers:

Safety Injection Pump lA

2. Safety Injection Pump 1B
3. Safety Injection Pump 1Cl (Bus 16)
4. Safety Injection Pump 1C2 (Bus 14)
5. Containment Spray Pump lA
6. Containment Spray Pump 1B
7. Component Cooling Pump 1A
8. Component Cooling Pump 1B
9. Motor Driven Aux. Feedwater Pump 1A
10. Motor Driven Aux. Feedwater Pump 1B
11. Residual Heat Removal Pump 1A
12. Residual Heat Removal Pump 1B
13. Service Water Pump lA
14. Service Water Pump 1B
15. Service Water Pump 1C

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'ORP.

sk%'eptember ROCHESTER CAS AND ELEC 10, 80 SHEET NO. 2 To Mr. Boyce H. Grier, Director

16. Service Water Pump 1D
17. Containment Fan lA
18. Containment Fan 1B
19. Containment Fan 1C
20. Containment Fan 1D
21. 1A Diesel Generator Supply Breaker (Bus 14)
22. 1B Diesel Generator Supply Breaker (Bus 16)

'3. 1A Diesel Generator Supply Breaker (Bus 18)

24. 1B Diesel Generator Supply Breaker (Bus 17)

Continuity tests were performed on the above switches on July 25, 1980 and August 25, 1980 by qualified personnel using an approved proce-dure. The two tests detected no failures. In the ten years of Ginna Station operation there has not been any record of contact failures with Westing-house type W-2 Control Switches with spring return to neutral position.

A proposal for a wiring change to the green indicating light circuit for each of the above breakers such that the neutral contact in the automatic close circuit for the breaker is continuously monitored has been initiated for review by the station technical staff (TSR 80-10). This proposal is being processed in accordance with Ginna Station administrative procedures with plans for implementation during the first plant outage following approval of this modification.

Continuity tests will be performed-at least- every 3-1 days on all of-L the above switches. For those switches that are actuated within that time period, a continuity test will be performed within seven days of their actuation; This surveillance frequency is felt to be adequate based on the two successful continuity tests already performed, combined with the ten year trouble free operation of W-2 switches at Ginna Station.

To assist in evaluating the value/impact of each Bulletin on licensees, manpower expended in conduct of the review and preparation of this report is approximately 39 manhours. No corrective actions were necessary.

Very truly yours, L. D. White, Jr.

xc: Director, Div. of Reactor Operations Inspection Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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