ML20084U091

LER BFRO-50-296/7612:on 760914,during Startup Testing of Thermocouple Wiring for TI-64-52,drywell Temp Found Open Inside Drywell.Caused by Signal Loss Due to Loose Penetration Connector.Connector Tightened

ML20084U091
Person / Time
Site:	Browns Ferry
Issue date:	10/13/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-296-761, NUDOCS 8306270048
Download: ML20084U091 (2)

Text

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LICENS5s EVEffT REPORT l l l l [ PLEASED ALL RECUIRED INFOWM/GION)

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7 69 14 1b EVENT DATE AEPOGY Ot.tE CAflGChf T rW DOCkti P.UYarn 01 CON'i l l l W 'W l 0 l 5 l 0l-l 0 l 2l 9l 6] US l019l1l4l7l6l 69 74 l

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7 8 57 50 59 60 61 EVENT DESC6tPTION

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@ ' During startup testing thennocouple virina for T1-64-52. devuell temerature,yas 60 7 09 l

@ l found open inside the dryuell. (UFRO-50 196/76124 BC 7 89 l

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@ l Thermal expansion durin?, startup apparently caused the loss of sinnat as a result 60 7 H9 h lthe penetration connector not beinq fully tirbtened. OG 7 H9 l

1 l METHOD Cr F ACILIT Y

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. .t. TENNESSEE VALLEY AUTHORITY Q ,

Cf 4 ATTANOOGA. TENNCSSCc 37401

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0,c. nib October 13; 1976 '

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% + 7 REtavE0 Mr. Norman C. !!oscicy, Direct;pr e OCTI8 376 en

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U.S. Nuclear Regulatory Coxaission y,,, m m m , _._

Office of Inspection and Enforcement Region 11 h eggen g 230 Peachtree Street, NW., 8th Floor / g Atlanta, Georgia 30303 g

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Dear Mr. Moseley:

TENNESSEE V UTHORITY - BR0lf.iS FERRY NUCLEAR PLANT UNIT 3 -

DOCKET NO. 0 FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-296/7612

, The enclosed report is to provide details concerning the thermocouple viring for TI-64-52, dryvell temperature, that was found open incide the drywell during startup testing. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This event occurred on Browns Ferry Nucicar Plant unit 3.

Very truly yours,

• TI2TNESSEE VALLEY AUTl!ORITY d

! H. S. Fox Director of Power Production Enclosure (3) .

CC (Enclosure):

Director (3)

Offico of Itanagement Infornation and Program Control '

l U.S. Nuclear Regulatory Cocalission Washington, D.C.,20555 Direstor_(10) j Of fice of Inspection and Enforcement COPY SENT REGION - ^"

4 U.S. Nuc1 car Regulatory Comniosion l ,

Washington, D.C. 20555 1

l  ! 10553 i An f quM Opportunity fenployer ,

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