ML20070V947

Interim Deficiency Rept Re Telephone Relays to Protective Relays Mfg by Ge.Initially Reported on 820407.Contact Button Separated from Contact Arm.Visual Insp of All Class IE Date Code & Nondate Code Relays Will Be Performed Each Month

ML20070V947
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	02/07/1983
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-819, NUDOCS 8302180202
Download: ML20070V947 (2)

Text

~. . . -- . .

'. .~

SNRC-819

. , - February 7, 1983

• Page 2

3. A field survey of all protective relays incorporating the telephone relay has been completed. Thirteen class lE. relays have been found having the suspect date codes and six class lE~

relays were missing QC date code stickers. All relays with suspect date codes and without date code stickers have been visually inspected as per G.E. 's recommendation and their installed locations have been recorded. At the completion of the visual inspection, there were no defective telephone relays found in Shoreham's equipment.

Subsequently, on December 22, 1982=, we were informed by LILCO Startup that one class 1E telephone relay had been found by them with a separated contact button. A report of this failure was submitted to.the Stone & Webster Site Engineering Office for their evaluation and determination of the cause of this failure.

Following evaluation of the available information and the' defective relay's application, the Site-Engineering. Office has not been able to determine if this failure was the result of the generic problem as described in G.E.'s letter, dated March 26, 1982, or an isolated failure unrelated to the subject defect. The defective relay has been replaced and-is'being forwarded to G.E. for their analysis.

Corrective Action to Prevent Recurrence A visual inspection of all suspect class lE date-code relays and relays without date code stickers will be performed on a monthly basis - to detect any evidence of defects and to ensure safe operation of these relays. Replacement' relays are being ordered for all class 1E suspect date code relays and relays without-date stickers. Upon receipt and installation of the replacement relays for the required applications, the monthly visual inspections will be terminated.

Very truly yours, M=

M. H. Milligan ng Project Engineer

$QQ Shoreham Nuclear Power Station 88

' no JSK/ laws 2 en O

gg cc: All Parties jjoa Mr. J. Higgins, Site NRC 5 Mr. Richard DeYoung, Director

.og NRC Office of Inspection & Enforcement

{Lm Division of Reactor Operation ~ Inspection Washington, DC 20555

gm - w,*re m

. . . - LONG ISLAND LIGHTING COMPANY Iu>n.mmw.mw.mmd SHOREHAM NUCLEAR POWER STATION P.O. BOX 618, NORTH COUNTRY ROAD

• WADING RIVER, N.Y.11792 Direct Dial Number February 7, 1983 SNRC-819 Mr. Ronald C. Haynes Office of Inspection and Enforcement Region 1 U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Long Island Lighting Company Shoreham Nuclear Power Station - Unit 1 Docket No. 50-322

Dear Mr. Haynes:

On April 7, 1982, in accordance with 10CFR50.55 (e) , we reported verbally to Region 1 of a potential deficiency with telephone relays that are an integral part of protective relays manufactured by General Electric Company. A 30-day written report of this deficiency was submitted on May 13, 1982 (Ref. SNRC-697). This letter serves as a follow-up report.

Description of Deficiency on April 1, 1982, we were advised by G.E. of a potential problem with telephone relays which are an integral part of protective relays utilized in various class 1E switchgear at Shoreham. The protective relays containing these potentially deficient telephone relays were manufactured between July, 1980 and February, 1982.

G.E. has determined during their routine factory testing that a contact button was found separated from the contact arm on some of the integral-mounted telephone relays. As a result of our review of G.E.'s report to us, we determined that this situation consti-tuted a potential reportable deficiency under 10CFR50.55(e).

Corrective Action The following corrective actions have been taken:

1. A list of all protective relays supplied to Shoreham which incorporate telephone relays was obtained from G.E.

2. Stone & Webster Engineering Corp. prepared a list showing the locations of all protective relays incorporating the telephone relays. %j FC-8 9 35.1