ML19336A687

Part 21 Final Rept Re Intermittent Contact Operation Occurring in Type W-2 Switch When Set in Neutral Position. Util Will Implement Westinghouse Interim Rewiring Solution

ML19336A687
Person / Time
Site:	Marble Hill
Issue date:	10/14/1980
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
REF-PT21-80-233-003 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8010300484
Download: ML19336A687 (3)

Text

PART 21 IIEUIFICATION NO. Tso-735-oos CGWMIWEfabi SoA % d.

D4TE 0 LETTER tolNi6o D30(ET NO. %-%\\60 DATE DISTRIBUTED dNI*o e m-ORIGlilAL EPORT StPPLEEIRARY x DISTRIBUTION:

EACTOR (R) xl FLEL CYCE &

SAFEGl!ARDS (S) fA IE FIES lE FIES AD/ROI IE FIES AD/SG AD/RCI AD/FRSI AD/ROI EGIONSI,II,III,IV,V EGIONS I,II,III,IV,V EGIGG I,II,III,lV,V VSOJR BR. R-IV VEIOJR BR. R-IV VaiDDR BR R-IV LEB / IPA NG 5715 itES / FGS SS-395

-NRP/D3L AE0D NG76g LEB / IPA MG 5715 IPES / SG SS-881 NRR/DJE ACOD MG 7602 LEB / IPA M G 5715 NRR/DSI ASLB? E/W i!50 AEOD MG 7602 tR E T SAP /SP NG-7210A ASLBP E/W 453 NRR/D3L CEhTPAL FIES 016 CSURAL FIES 016 ASLBP FM 450 CBERE FIES ( GRIO CBERAL FIES (GR00 CBERAL FIES 016 PDR CBERAL FIES SS-395 ENTRAL FIES (DifDD LPDR PDR PDR TEPA LPDR LPDR TERA Idk

' ACTION:

PRELIMitMRY EVALUATION OF THE' ATTACHED REPORT INDICATES LEAD RESR)NSIBILITY F R FOLLONJP AS SFOhN.BELOW:

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f:D-Zyg PUBLIC f3EF3\\/IC:E INDIANA S. W. Shields Vice PresWent. Electric System October 14, 1980 4

Mr. James G. Keppler, Director Docket Nos.:

STN50-54Cf U. S. Nuclear Regulatory Commission STN 50-547 Region III Construction Permit Nos.

I 799 Roosevelt Road CPPR - 170 Glen Ellyn, Illinois 60137 CPPR - l~1 Marble Hill Nuclear Generating Station - Units 1 arid 2

Dear Mr. Keppler:

On June 19, 1980, Mr. T. D. Geib of Public Service Company of Tadiana, Inc., (PSI) r.otified your office of a potentially reportable item as required by 10 CFR 50.55(e).

The same item was also rcported by Westinghouse under 10 CFR 21 (see Westinghouse letter ra. NS-TMA-2264,

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dated June 18, 1980, to the Director, Office of Inspaction and Enforcement).

Westinghouse identified intermittent contact operation as a problem occuring in their Type W-2 switch when it is set in the neutral position.

t This switch is used in a number of safeguards systems and this problem can defeat the automatic actuation function of the switch.

Westinghouse has been studying intermittent contact operation of their Type W-2 switches and presently continues to recommend the interim solution of rewiring indicator lights as described in Westinghouse NSD Technical Bulletin No. NSD-TB-80-9.

PSI will implement this interim solution if a permanent solution is not available six months prior to fuel load. PSI will continue to monitor the efforts of Westinghouse it. this matter and implement the necessary changes.

This letter is intended to fulfill the requirements of a final report as defined in 10 CFR 50.55(e).

If you have any questions on this report, please feel free to contact me.

Sincerely, f/

S. W. Shields TDG/cg u:

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1000 East Main Street. Plainfield, Indiana 46168 317. 839.9611

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PUBLIC if 4 DI AN A Letter:

James G. Keppler Octcber 14, 19EiG,

SERVICE

. Director of_ Inspection and EnforcementG cc:

U. S. 1:uclear Regulatory Commission Washington, D. C.

20555 E. R. Schweibinz, P. E.

J. J. Harrison j

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