ML20071J253
| ML20071J253 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 04/14/1982 |
| From: | Milligan M LONG ISLAND LIGHTING CO. |
| To: | Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SNRC-690, NUDOCS 8204270157 | |
| Download: ML20071J253 (2) | |
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LONG ISLAND LIGHTING COM PANY t
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l SHOREHAM NUCLEAR POWER STATION br.ww.n, w a.a.f P.O. BOX 618, NCRTH COUNTRY ROAD e WADING RIVER. N.Y.11792
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SNRC-690
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Mr. Ronald C.
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Office of Inspection & Enforcement O'
Region 1
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Nuclear Regulatory Commission 631 Park Avenue
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King of Prussia, PA 19406 61 l n s SHOREHAM NUCLEAR POWER STATION - UNIT 1 DOCKET NO. 50-322
Dear Mr. Haynes:
On March 19, 1982, in accordance with 10CFR 50.55 (e), we reported verbally to Region 1 of a deficiency within HMA type relays manufactured by General Electric Co.
This letter serves as our 30-day written report of this deficiency, and describes the corrective action to be taken.
I Description of Deficiency In December, LILCO was advised by General Electric Co., Service Advice Letter 721-PSM-166.1, of a possible defect in some HMA type relays manufactured during the period from January, 1976 through June, 1981.
General Electric Co. has determined that the length of the unin-sulated flexible leads connected to the moveable contacts of some HMA relays exceeds the allowable dimensions.
This can result in reduced spacings between the leads and the coil circuit termi-nals, which can result in short circuits between these circuits.
l As a result of the Service Advice Letter, a preliminary inspection of the HMA relays was performed.
A.1Fhough none of the i
relays inspected appeared to exhibit the defect, we were unable to conclude that the HMA relays examined were acceptable, since the Service Advice Letter did not specify minimum spacings between the flexible leads nor the method of inspection.
During the course of this investigation, six HMA relays (unin-stalled spares) were examined and found to exhibit the defect described in the subject S.A.L.
since their uninsulated flexible l
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s SNRC-690 April 14, 1982 Page Two leads were long enough to contact their coil wire terminal points.
These six (6) relays were "QC date coded" as being manufactured prior to the January, 1976 through June, 1981 period described in the SAL.
General Electric has been notified of this finding.
As a result of this finding, it was determined that this situa-tion constitutes a reportable deficiency under 10CFR 50.55 (e).
Corrective Action General Electric Company has developed a modification to the flexible leads by assembling a heat shrinkable insulated tubing over the contact terminals.
The heat shrinkable tubing will cover the terminals and approximately 5/16 inch of the flexible braid, thus eliminating a minimum spacings requirement between the flexible leads and the coil contact terminals.
This modification will be performed on all Cat lE relays by installing the heat shrink tubing over the flexible leads which exhibit deficient spacings.
The modification of all deficient Cat lE HMA relays should be completed by June 30, 1982.
Very truly yours,
}.H.
Anh4nt Milligan JSK/ law cc:
Mr. Richard DeYoung, Director NRC Office of Inspection & Enforcement Division of Reactor Operation Inspection Washington,- D.C.
20555 Mr.
J.
Higgins, Site NRC r