ML18283B462

Licensee Event Report Concerning the Thermocouple Wiring for TI-64-52, Drywell Temperature, That Was Found Open Inside the Drywell During Startup Testing

ML18283B462
Person / Time
Site:	Browns Ferry
Issue date:	10/13/1976
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/IE, NRC/RGN-II
References
Download: ML18283B462 (6)

Text

NRC FoRM 195 U.S. NUCLEAR RF GULATORY MISSION I2.76)

FILE NUMBER

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NRC DISTRIBUTION FoR PART 50 DOCI(ET MATERIAL INCIDEIG'EPORT To: FROM: DATE OF DOCUMENT Mr Moseley Tennessee Valley Authority 10-13-76 Chattanooga, Tn DATE RECEIVED H S Fox 11-5-76

@LETTER QNOTOR IZED PROP INPUT FORM NUMBER OF COPIES RECEIVED ORIGINAL QUNCLASSIFIE D COPY one signed DESCRIPTION ENCLOSU RE Ltr trans the following: Licensee Event Report (R087612) -on 9-14-76 concerning open thermocouple wiring for TI-52, drywell. temperature, which was found dur ing s tar t-up tes t ing.......

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PLANT NAME'rowns Ferry iP3 NOTE: IP PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J..COLLINS ACTION/INFORMATION 11-8-76 ehf FmLNCH CF~EF:

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%~A'OR ACRS CYS EQ&SRK S INTERNAL DISTRIBUTION NRC PDR I RE 2 MIPC SCHROEDER IPPOLITO HOU SKIN NOVAK CIECK GRIMES CASE HANAUEH TEDESCO MACCARY EISENIHJT HAEH SHAO VOLLMER HUNCII KHEGEH J.COLLINS EXTERNAL DISTR II3UTION CONTROL NUMBER LPDH: c~@

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c L.UTlay TENNESSEE VALLEY AUTHORITY O m CHATTANOOGA. TENNESSEE 37401 b.

'~)s-19<e October 13, 1976 rlPGULAtORY 000 Mr. Norman C. Moseley, Director "~~ 1'~

U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Oy Region II '~/~ 7~(

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-50-296/7612 The enclosed report is to provide details concerning the thermocouple wiring for TI-64-52, drywell temperature, that was found open inside the.drywell during startup testing. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This event occurred on Browns Ferry Nuclear Plant unit 3.

Very truly yours, TENNESSEE VALLEY A HORITY Ol ~rRRLLO

$ 11 1L'9 S. Fox Director of Power Production 6

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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 X9 2'79 An Equal Opportunity Employer

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LIC 'EE EVENT REPORT P.'~+CONTROL BLOCK: (PLEASE T 'T ALL REQLIIRED II'JFORFAWION)

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LICENSE EVENT iVAME LICENSE NUMBEfl TYPE TYPE

[OD1]

A' B O' 3 0 0 '0 0 0 00.

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7 69 14 15 25 26 30 31 32 7

[OD1]OON'T 8

CATEGORY 57 58 REPORT

'YPE L

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'L flEPORT SOURCE 60 61 0 5 DOCKET NU'.IOER 0 0 2 9 6 68 69 0 9 EVE'NT DATE 1 4 7 6 74 75 REPORT DATE 80 EVENT OESCRIPTION

[aalu 'urin startu testin thermocou le wirin~ for TI 2 dr ell tern era u ~a 89 80

[OD3] found o en inside the dr cell. BFRO-50-2 6 612 80 7 8 9 7 8 9 t006j 7 89 PRME 80 SYSTEM CAUSE COMPONENT CO .IPCNENT CODE CODE COI,1PONENT'ODE SUPPUER IAANUFACTUIIER VOLATION

[Oopl ~ID A 11'"

T N B T U ~N G 0 8 0 7 8 9 10 12 17 43 44 47 48 CAUSE DESCRIPTION IOOI Thermal expansion during startup apparentl caused the loss of signal as a result of 7 8 9

[00/'he enetration 7 89-connector not bein full ti htened s

~iu 7 89 METI100 OF 60 FAC(UTY STATUS 9L POWER OTIIER STATUS DISCOVERY DISCOVERY DESCR!PTION B ~0 0~0 Subcritical Routine review of plant instrument~s 7 8 9 10 12 13 44 45 46 80 FOAM OF ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF I ELEASE 7 8 9 PERSONNEL EXPOSURES

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PERSONNEL INJURIES NUMBER QFS" RIPTIQN 7

IH89Lo LoOol 11 12 NA OFFSITE CONSEQUENCES 7

Kl NA 89'OSS OR OAIYIAGE TO FACILITY TYPE DESCRIPTION I 7~

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NA 7 8 9 AODITIOtVAL FACTORS libel [The penetration eonneator was tiohtened.

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