ML18283B448

LER 1976-020-00 for Browns Ferry, Unit 3, Drywell Temperature Recorder TR-64-52 Became Erratic During Startup Testing

ML18283B448
Person / Time
Site:	Browns Ferry
Issue date:	01/10/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
LER 1976-020-00
Download: ML18283B448 (6)

Text

NRC FORM 1/5 U.S.NUCLEAR REGUI ATORY COM (2 76 I NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL ION DOCKET NUMBER 50-296 FILE NUMBER INCIDENT REPORT':.TO: Norman C.Moseley FROM: TVA Chattanooga, Tennessee 3740 H.S.Fox DATE OF DOCUMENT 1>>10-77 DATE RECEIVED l-l-7 I.ET ER ORIGINAL OCOP Y QNOTORIZED PjfV N C L ASS I F I E D PROP INPUT FORM NUMBER OF COPIES RECEIVED 1 signed org.DESCRIPTION Ltr.Trans The Following:

(1~~)ENCLOSURE Licensee Event Report (RO 50 296/7620)on 12-12-76 concerning that during startup testing drywell temperature recorder TR-6II-52 became erratic.(1 encl rec'd)(1 page.)=PLANT NAME: BROWNS FERRY UNXT P.3 ACZNOVn,EDGED.DONOT REMOVE NOTE: IP PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO'KREGER/J; COLLINS'-BRANCH CHIEF: W 3 CYS FOR ACTIN LIC, ASST': W CYS ACRS CYS%%8%H8 S LEE FOR ACTION/INFORMATION

~G~G-NRC PDR I&E 2'IPC SCHROEDER/IPPOLITO HOUSTON NOVhK/CHECK GRIMES CASE BUTLER HANAUER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BUNCH KREGER/J COLLINS INTERNAL DISTR I BUTION LPDR: ens~TIC: N~EXTERNAL DISTRIBUTION CONTROL NUMBER

~~~a>If C l g<>IPW+g~~-u c IL KJ p 4 O Pl b.'~~a-tete January 10, 1977 TENNESSEE VALLEY AUTHORITY CHATTANOOGA.

TENNESSEE 3740'I Regulatory Docket File Mr.Norman C.Moseley, Director U.S.Nuclear Regulatory Commission Office of Inspection and Enforcement Region II 230 Peachtree Street, NW., 8th Floor Atlanta, Georgia 30303

Dear Mr.Moseley:

TENNESSEE VALLEY AUTHORITY-BROWNS FERRY NUCLEAR PLANT UNIT 3-DOCKET NO.50-296-FACILITY OPERATING LICENSE DPR-68-REPORTABLE OCCURRENCE REPORT BFRO-50-296/7620 The enclosed report is to provide details concerning the drywell temperature recorder TR-64-52 that became erratic during startup testing.This report is submitted in accordance with Browns Ferry Technical Specifications Section 6.This event occurr on Browns Ferry Nuclear Plant unit 3.Very truly yours, TENNESSEE VALLEY AUTHORITY H.S.Fox Director of Power Production I OL t-/y>~".>wa>g~reut~~eo~us IQg Enclosure (3)CC (Enclosure):

Director (3)Office of Management Information and Program Control U.S.Nuclear Regulatory Commission Washington, D.C.20555 Director (40)Office of Inspection and Enforcement U.S.Nuclear Regulatory Commission Washington, D.C.20555 An Equal Opportunity Employer t R t"J)~~f ffi, f tI~lf Jt, II m")a~'I ti~.~

LICENSEE EVENT~REPORT<<CONTROL BLOCK:~e LICENSEE NAME+0'L B.R R B 0 89 14 15 LICENSE NUMBEA 0-0 0 0 0 0-0 LICENSE TYPE 0 4 1'1 1 25 26.30 EVENT TYPE 31 32 t'PLEASE, T ALQ REQUIRED INFORMATION)

.AEPOAT AEPOAT CATEGORY TYPE SOURCE le+>come~8 57 58 59.60 EVENT OESCRIPTION During sta'rtup testing DOCKET NUMBER 0 5 0 0 2 9 6 EVENT DATE 1 2 1 2 7 6 AEPOAT DATE 68 69 74 75'drywell temperature recorder TR-64-52 became erratic..A 80 89 redundant indicator, TT.-64-52, was operable.(BFRO-50-296/7620) 8 9 i+04'9 80 80 80 7 8 9~as 8 9 SYSTENI CAUSE'ODE CODE~os~ID E 7 8 9 10 11 12 CAUSE OESCRIPTION Ioom I The checmcccup'le PAME Ql I elI e<<e SUPPUQI<<Qe epQele~g MANUF ACT UFER Z 9 9 9 COMPONENT CODE N S T R U N'7 43 a7 48 lead was found broken insid'e the junction box"and was connected.

80 7 8 9 Q~I Climatic-0/600 F cu/con.'A loose set screw holding terminal block in place may 7 8 9 I~I", I-have allowed excessive vibration of thermocou le leads.80 OTHER STATUS-OFFSITE CONSEQUENCES Q~g 7 8 9 LOSS OR OAMAGE TO FACILITY TYPE DESCRIPTION EG6 LJ 7 8 9'Io P.UBLICITY 7 89 AOO!TIONAL FACTORS 7 9 FACIUTY STATUS POWER Q~g,.B I~oe B 7 8 9 10 12 13 FOAVI OF I AC.IVITY CONTENT AELEAS O OF RELEASE AMOUNT'OF ACTIVITY~$2 Z Z EA 8 9 10 11, PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

~QO 0 Z 7 8 9 11 1P 13 PERSOI"NEL INJURIES I11I LQL~I 7 8 9'1 12 METHOD OF DISCOVERY 44 45 46 44 as NA DISCOVERY OESCR>PTION Routine inspection LOCATION OF RELEASE NA 80 80 80 80 80 80 80 r 89[ll9j 89 PHONE: 80 80.Gro$6 I~661 sf 0 I tp