ML18283B442

LER 1977-002-00 for Browns Ferry, Unit 3, HPCI Restraints R-24 & R-35 on Pump Discharge Line Were Discovered with Loose Bolts & Broken Cinch Anchors Upon Completion of Operation of HPCI System During Reactor Scram on 1/26/1977

ML18283B442
Person / Time
Site:	Browns Ferry
Issue date:	02/17/1977
From:	Fox H Tennessee Valley Authority
To:	Moseley N NRC/RGN-II
References
LER 1977-002-00
Download: ML18283B442 (6)

Text

NRC FO~F'95 U.S. NUCLEAR REGULATORY ~MISSION DOCKET NUMBER (2 76$ >, 50-296 FILE NUMBER INCIDENT REPORT TO: FROM: DATE OF DOCUMENT Tennessee Valley Authority 2/17/77 Chattanooga, Tennessee DATE RECEIVED Mr. Norman C. Moseley H, ST Fox 2/22/77 RELETTER 0 NO TOR IZ E D PROP INPUT FORM NUMBER OF COPIES RECEIVED QORIGINAL 84NCLASSIFIE D

%COP Y None signed DESCRIPTION ENCLOSURE Ltx. trans the following: Licensee Event Report (RO 50-296/772) on 1/26/77 concerning HPCI restraints R-24 6 DOZOTBZ R-35 on the pump discharge line which were discovex'ed with loose bolts and broken cinch .

anchorsy ~ ~ ~ ~ ~ ~ ~ ~ ~

IAGKN0%LEDG~D PLANT NAME:

Browns Ferry Unit No, 3 (1-P) (1-P)

NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J, COLLINS FOR ACTION/INFORMATION 2 25 77 R L BRANCH CHIEF: Kniel W 3 CYS FOR ACTION LIC, ASST,:

W CYS ACRS CYS 86RBXHG S NT:

INTERNAL D ISTRI BUTION REG FILE HR~DR I6cE 2 MIPC SCHROEDER/IPPOLITO HOUSTON NOVAK/CHECK GRIMES CASE BUTLER TEDESCO/MACCARY EISENHUT BAER SHAO VOLLMER/BUNCH KREGER/J. COLLINS EXTERNAL DISTRIBUTION CONTROL NUMBE R LPDR:A h n A TIC:

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NRC FORM I95 (2-75)

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e TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 87401 February 3.7~ 1977 ~O

~t<~I ~g[@)P Mr. Norman C. Moselaqr, Director U.S. Huc1ear Regulatory Commission 9~ FEB221977~.12 Office of Inspection,and Enforcement uaSi m~pg Region XI ~/ Qdl& Q1 230 Peachtree Street, Kf.~ Suite 1237 Atlanta~ Georgia 30303

Dear Mr. Moseley:

TENI!IESSEE VAIZZZ AUTHORITY BRSINS ERE RCLEAR KQT EKT 3 DOCKET RO. 50>>2/6 FACILITY OPZRLTXEG XiXCERSE DPR-68 REPORSQKE OCCURRENCE REPORT 3PRO-50<<2@/772 The end.osed report is to provide details concerning HPCX,restraints R<<24 and, R-35 on the pgnp discharge line ><hach vere discovered >d.th loose bo1ts and, brotren cinch anchors upon completion of operation of the HPCI system during a reactor scram on January 26> 1977. This report is soled.tted in accordance wiW Rrcnmi Ferry Tech',ca1 Specifications Section 6, This event Occurred on Brogans Perry un9.t 3.

Very truly yours, )gl'g, TENHESSEE VALIEK AUTHORITY ~go uasPa

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~CDPgaslCA Hi S. I'ox gy koelQ Director of Pmrer Production (P Enclosure (3)

CC (Enclosure) t Director (3)

Office of Management Xnformation and, Program Contr U.S. Hu&ear Regulatory Commission Hase on D.C. 205 5 Director (IIIO)

Office of Xnspection and, Enforcement U.S. Kuc1ear Regulatory Commission Washington, D.C. 20555'

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CON'I'ROL BLOCK:

EVENT. REPORT (PLEASE PAINT ALL TIfQUITIfn INFOflf1ATION3 1 6 LICENSEE LICENSE EV ENT NAt 'E I ICENSE IIUMBER TYPE TYPE

[ouij [A L B R' 5[ 0 0 0 0 0 0 0 0 0 4 1 1 1 1 ~02 7 89 14 15 25 26 30 31 32 r

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~j CA'TEGORY 57 EVENT DESCRIPTION 58 RCPORT

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59 REPORT SOUPCE 60 61 0 5 OOCKET NUM8EA 0 0 ~2~96 68 69 0 1 EVENT DATE 2 6 7 7 74

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75 REPORT OATE

[. J tlO22) I On January 26, 1977, at 1947 hours0.0225 days <br />0.541 hours <br />0.00322 weeks <br />7.408335e-4 months <br />, the ZPCIwas initiated during a reactor scram.

7 09 63 tOO3 [ Upon completion of the o eration of the HPCX s stem HPCX restraints R-24 and R>>3S 7 09 7

[Qo<J [on the onm 0 9 dieohe~re .line we e d'o RR<LJtLOIL'~o h ~io~nchoxs U SO Sn QOB

'09I (BFRO-50-296 772 7 89 Jog 7 89 PRME SYS TEM CAUSE COMPONENT COMPOIIEtIT COOE CODE, COMPONENT CODE SUPPLIER MANUFACTUt rR

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[ B 11 I [N~IA 12 N ~G< R 1/

N, 43 T 1 4 2 47 48 CAUSE DESCR!PTION Qpg Restraints R-24 and R-35 were not installed as designed and it appears that the 7 0 9 m

7 0 9 surging of the pump discharge line durin initiations caused the restraints to 60

~1O loo en

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7 8 9 BO FACiUTY METIIOO OF STATUS 96 POWER OTHER STATUS DISCOVERY OISCOVERY OESCRiPTION

.~R ~10 O NA QB outine ns ection 7" 8 9 10 12 13 44 45 46 FOAM OF ACTIVITY CONTENT AELEASEO OF RELEASE AMOUNT OF ACTIVITY ~

LOCATION OF RELEASE Z 2 'AIIL NA 9 'Io 11 44 45 80

. PERSONNEL EXPOSURES NUMDER TYPE OESCPIPTION LOOol 0 ~z 7 0 9 1 I 12 i3 PERSONf')EL IfwJURIES

~ I 7'8 [ o~oo I 9 11 'I2 00 OFI'SITE COIVSEQUEiVCES 7 09 LOSS OR DAMAGE TO FACILITY NA 7 09 10 PUBLICITY 89 IZJ t-ADDITIONAL FACTORS 09 L'=-.'""-' '

7 bO IB7 7 88

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