ML19351D157

Responds to IE Bulletin 80-20, Failures of Westinghouse Type W-2 Spring Return to Neutral Control Switches. Indicating Lights on Switches Will Be Rewired as Interim Solution.List Identifying Switches Encl

ML19351D157
Person / Time
Site:	Marble Hill
Issue date:	09/15/1980
From:	Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-80-20, NUDOCS 8010090107
Download: ML19351D157 (2)

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PUBLIC SERVICE INDIANA September 15, 1980 S. W. Shields Senior Vice Presdent -

Nuclear Division Mr. James C. Keppler, Director Docket Nos.: STN 50-546 U.S. Nuclear Regulatory Commission STN 50-547 Region III Construction Permit Nos.:

799 Roosevelt Road CPPR-170 Clen Ellyn, IL 60137 CPPR-171 Marble Hill Nuclear Generating Station - Units 1 and 2 IE Bulletin 80-20

Dear Mr. Keppler:

In response to IE Bulletin 80-20, Public Service Company of Indiana, Inc.,

(PSI) has determined that Westinghouse Type W-2 Control Switches, with a spring return to the neutral position, will be used in safety-related applications at Marble Hill. These switches are identified in the attachment.

Westinghouse recommends rewiring the indicating lights as an interim solution to the problem. Marble Hill will implement this interim solution if no permanent solution is available six months prior to fuel load. PSI will continue to monitor the efforts of Westinghouse in this matter and implement

, the necessary changes.

I If you have any questions regarding this matter, please address them to my office.

Sincer ly, s

//

S.W. Shields Senior Vice President Nuclear Division CAS/kdt

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cc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D. C. 20555 E. R. Schweibinz J. J. Harrison SEP 1 8 $3C P.O. Box 190, New Washington, Indiana 47162 812. 293.4441 8010090 fW

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USE OF WESTINGHOUSE TYPE W-2 CONTROL. SWITCHES IN

. SAFETY-RELATED APPLICATIONS FOR MARBLE HILL UNITS 1 AND 2

I SYSTEM. UNIT 1 UNIT 2 COMMON Primary Containment Ventilation 8 8 l Auxiliary Feedwater 2 2

! Essential Service Water. 2 2 16 Component Cooling 4 4 1

~ Containment Spray 2 2 Safety Injection 2 2 Residual Heat Removal- 2 2 Boron Thermal Regeneration 1 1

. Chemical ~ Volume and' Control 3 3 Boric Acid Processing. I 1 Switchgear Heat Removal 5 5 Auxiliary Power 480V Transformer Switchgear Motor Control Centers 12 12 Diesel Generator 6 6 Chilled Water 4 Miscellaneous Electrical Equipment Room HVAC 1 1 Auxiliary Building HVAC 16 Diesel Generator Room Ventilation 2 2 Control Room, Auxiliary Electrical Equipment Room HVAC 6