ML20092N921

Ro:On 840528,operator Received Servo Fault Alarm & Linear Power Channel Indication Failed Low.Caused by High Voltage Supply for Linear Defector de-energized

ML20092N921
Person / Time
Site:	Texas A&M University, 05000128
Issue date:	05/29/1984
From:	Willits B TEXAS A&M UNIV., COLLEGE STATION, TX
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 8407050212
Download: ML20092N921 (1)

Text

=---- ggggg f .

O .

4-0518605150 05/20/a4 ICS IPP8NG7 CSE MCPR a098457551 MGMB TORN COLLEGE STATI0h TX 204 05-24 0441R EST O \

e 05 M

e PP. E. JOHNSON, CFFICE OF INSRECTIGN AND ENFORCEMENT, REGION a } r@ @ @ N k O U.S. NUCLEAR REGULATORY COMMISSICN 611 RYAN O FLAZA DP SUITE 1000 JUN - 41984 ARLINGTOA TX 76012 y O L' _

E y')

O '

O RE: REPORTABLE OCCURENCE O ON HAY 2e, Ioau, nURING NORrAL REiCTCR OPERATICNS THE sIGHTSFIri S SENIOR REACTOR OPERATOR RECEIVED A SERVO FAULT ALARM AND NOTED THAT THE LINEAR POWER CFANNEL INDICATION FAO FAILED LCh. THE SRO COPMENCED O A SHUT 00rN Or THE 9EACTOR IN ACCCRDANCE *ITH TwE STANDARD OPERATING S PRCCEDUDES SOP 3-C. SUBSEQUENT INVESTIGATION REVEALED THAT TFE HIGW VOLTAGE SUPPLY FOR THE LINEAR DEFECTCR *AS DE-ENERGIZE 0 AND IT O APPEARS THAT THIS OCCURRED AS THE CRERATOR WAS TAKING LOG READINGS BY O BPUSHING AGAINST THE PC*ER SUPPLY SWITCH. A PRE-START UP CHECK PERFORMED HAY 2Q INDICATED THAT THE CFANNEL WAS FUNCTIONING O CORRECTLY. ALTHOUGH TwE STAFF OF TFE NUCLEAR SCIENCE CENTER FEEL THAT O.

THE OPERATOR ACTED PROFERLY AND IN ACCCROANCE WITH STANDARD CDERATING  ;

PPCCEDURFs THE NSC TECFNICAL SPECIFICATIONS SECTICA 3.2.1 SPECIFY O THAT THE REACTOR WILL NOT BE OPERATet *ITHOUT THIS PChER *0NITCRING O INSTRUMENT. THIS INCIDENT THEN IS FELT TO CONSTITUTE A REPCRTABLE OCCURRENCE et NSC TECHNICAL SPECIFICATION DEFINITICN. A WRITTEN O PEPORT WILL PE SUBPITTED TO THE REGICN 4 0FFICE. O, ,

BARRY WILLITS O rANAGEa REACTOs CPERATIONs e NUCLEAR SCIENCF CENTER TEWAS A&P UNIVERSITY O FE B0x e9 9 COLLEGE STATION TX 77ec3 O /O 17:26 EST 4/

O eGuCove p 9, i

O 9

@O 1 0 e4o70so212 e40s29 8 PDR ADOCK 05o00059

S PDR "O TO REPLY BY MAILGRAM MESSAGE SEE REVERSE SIDE FOR WESTERN UNION'S TOLL - FREE PHONE NUM8ERS h

_ _ _ - - - . - . .- _ _ _ _ _ _ _ _ .