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)

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JOHNSON, CFFICE OF INSRECTIGN AND ENFORCEMENT, REGION a O

U.S. NUCLEAR REGULATORY COMMISSICN 611 RYAN O

FLAZA DP SUITE 1000 JUN - 41984 ARLINGTOA TX 76012 y

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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

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