ML18018B259

LER 78-019-00 for Nine Mile Point Unit 1 Regarding Discovery That Hydraulic Snubber 31-HS-1 Had Failed and Was Empty of Hydraulic Fluid and Disconnected from Its Anchor at the Feedwater Pipe

ML18018B259
Person / Time
Site:	Nine Mile Point
Issue date:	06/01/1978
From:	Schneider R Niagara Mohawk Power Corp
To:	Grier B NRC Region 1
References
LER 78-019-00
Download: ML18018B259 (8)

Text

PG IZOW REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

DISTRIBUTION FOR INCOMING MATERIAL 0-220 REC: GRIER B H ORG: SCHNEIDER R R DOCDATE: 06/01/78 NRC NIAGARA MOHAWK PWR DATE RCVD: 06/08/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

FORWARDING LICENSEE EVENT REPT <RO 50-220l78-Oi9) ON 05/22/78 CONCERNING LTR i ENCL i MAINTANANCE SURVEILLANCE TEST Ni-MST-Vi) FOUND HYDRAULlC SNUBBER 3i-HS-i HAD FAILED CAUSED BOTTOM NUT ON THE PIPE COLLAR FELL OFF... W/ATT.

PLANT NAME: NINE MILE PT - UNIT i REVIEWER INITIAL: XJM DISTRIBUTOR INlTIAL:Pk DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ++o++4+++<<++w<ww+

INCIDENT REPORTS (DISTRIBUTION CODE A002>

FOR ACTION: BR ORB03 BC+4W/4 ENCL INTERNAL: EG FIL lENCL NRC PDR++W/ENCL

~W/2 ENCL MIPC++W/3 ENCL I 0 C SYSTEMS BR++W/ENCL EMERGENCY PLAN BR++W/ENCL NOVAK/CHECK+%W/ENCL EEB+4W/ENCL AD FOR ENG>>W/ENCL PLANT SYSTEMS BR+>W/ENCL HANAUER<<W/ENCL AD FOR PLANT SYSTEMS+<W/ENCL AD FOR OPER TECH++W/ENCL REACTOR SAFETY BR>+W/ENCL ENGINEERING BR+4tW/ENCL VOLLMER/BUNCH+wW/ENCL KREGER/ J. COLL INS+4 W/ENCL POWER SYS BR>+W/ENCL K SEYFRI7/IE44W/ENCL EXTERNAL: LPDR S OSWEGO NY++W/ENCL TIC++W/ENCL NS I C4+W/ENCL ACRS CAT B44~W/i6 ENCL

'I COPIES NOT SUB'.1ITTED PER REGULATORY GUIDE 10.1 DISTRIBUTION: LTR 45 ENCL 45 CONTROL NBR: 781600325 SIZE: iP+iP+iP END

Mh(P-0163 NIAGARA MOHAWK POVIER CORPORATION/300 ERIE BOULEVARD V/EST. SYRACUSE N.Y. I3202/TELEPHONE (315) 47-'<<SI I June 1, 1978 f1')

CD pre C/l hh,. Bogce H. Gru.e/L I N/sec,to/L CD U+Q.'ed SCMab Muel.ea/L Regulato/I.g CoIIIIn& sion Ql~

Reg<<ion I ~CD 631 Pmf.'venue c~CIl O ~CD C

King o) P~aia, PA. 19406 G RE.-Socf.et Mo. 50-220 Oea/L rIh,. G/u'.e/L:

In acco/cdaItce II/MlL Mine, lKt'.e PoiI< Mucgea/L S~ation Unit ~1 TechIu'cd Speci/dicatioIa, Ne herteby aubItw'.t LiceIuee Evert'epo/Lt, LER 78-19, u'rrr'ch m in vko~ion o( Section 6.9.2b(9) o( 4he TechIu'.cd Speci.)ica.tio>u.

TRQ event II'as completed ~n Che )o/uIIa.t dce~gnated ~x MUREG-0161, dated July 1977.

Ve/Ly .ttuLt'.<J goukh, ORIGIMAL SIGMEO BY R.R. SCHMEIOER R.R: SchIie,ide/L Vice P<M.iden.t-Elec,tru.c P/I.oduc&oIi Enc,. (3 copen )

xc: Vme&o/L, OI(pce o) ISE (30 copen)

&@ecto/L, Ofhce o$ MIPC (3 copi Ill )

78ib00325

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NRC" l~~. I 31>G i m II z I I I L IIv

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I7.77) lt LICENSEE EVENT REPORT CONTROL BLOCK:

I ,Q (PLEASE PRI>NIT OR TYPE ALL REQUIRED INFORMATION)

~o N Y N Il P 1

,Ql,0 z 0 -0 010 0 0 - 0 0 Qz 4 1 1 1 1Q>~Qs 8 9 CAT'8 I

7 LICENSEE CODE LICENSE NUh1 BE R 25 26 LICENSE TYPE JO 57 CON'T

~o ~LQ 60 6I o 5 0 0 0 DOCKET NUMBER 2 2 0 68 Q70 09 5 2 2 EVENT DATE 7 8 74 OBO 75 6 0 2 REPORT DATE 7 IS ZO EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES +IO Q

'z During routine shutdown operations, maintenance Surveillance Test Nl-l>ST-Vl, found hydraulic snubber 31-HS-1 had failed. The snubber'as empty of hydraulic fluid and disconnected from its anchor at the feedwater pi pe. Thi s condi ti on i s reportabl e per Techni cal Speci fica-6 tion 6;9. 2b(9) . It resulted in minimal safety implications.

~OB 7 8 9 o0 SYSTEhl CAUSE CAUSE COMP.

CODE VALVE CODE SVBCOOE COMPONENT CODE SUBCODE SUBCODE

~OB ~CH Q>> ~E Q>z ~B Q>z S 0 P 0 R T Qi ~D Q>s ~Z Q>s.

7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISIO>V Q>7 LEA AQ R>kook ACTION FUTURE EVENTYEAA

~78 21 22 EFFECT

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23 SHUTDOlVN

~01 24 REPORT NO.

9 26

~~

27

~01 28 ATTACHMENT CODE 29 NPAO 4

~T 30 TYPE PRIME COhlP, 31 1",Q.

~0 32

~

TAKEN ACTION CQNIPQNENT ON PLANT hlETHOD HOURS ~22 SUBMITTED FORA1 bVB. SUPPLIER '1ANUFACTUREA

~UQ>s ~EQ>s ~<Qzo ~EQz> il 0 0 0 ~V Qzz ~VQ>4 ~NQzs 0 3 I S S Qs 33 34 35 36 37 40 42 43 44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS Q27 o Vibration in the feedk>ster i in caused the bottom nut on the i e collar to fall off. This allowed the Grinnell Fi . 201 snubber to be-

/

come disconnected. Fluid loss due to failed teflon o-rin .

Current surveillance testing schedules are adequate to insure early detection of future failures.

8 9 80 FACILITY STATUS

~00

~

'Ys POVIEA LNA OTHER STATUS Q h1ETHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 D Qzs 0 Qs Surveillance Testing 7 8 9 10 12 I 'I 44 45 46 60 ACTIVITY CONTENT AE'LEASED OF AELEASF, At 1OUNT QF ACTIVITYQB LOCATION OF.RELEASE QB

~IB 7 8

~z(y 9 10 z QBn NA 44 4r5 NA PEASONNEL EXPOSVAES NVMBEA TYPE DESCRIPTION Q39

~OO OJQzz Z Qzs NA 7 8 9 11 12 13 PEASONNEI INJURIES 80 9 11 12 LOSS OF OA DAMAOE TO FACILITY 80 TYPE OESCAIPTION Q43

~zQ2 NA 9 10 PUBLICITY 60 ISSUED DESCRIPTION Q4 NRC USE ONLY O Qnn NA 8 9 10

~ I ~ ir D.'K. HacVittie 315-343-2110 xlc5'I

NIAGARA MOIIAWKPOPOVER CORPORATION/3GO ERIE BOULEVARO WEST. SYRACUSE, N,Y. 13202/TE'LEPHONE (315'I 474-1611 June 1, 1978 hk. BoIJce H. Gme/r.

RAec toiL Used S~u Mu&ecvi. Reguj'atoll Comm& a~oI1 Region 7 631 Pa/I.k Auenue King oj Prtutaia, PA. 19406 RE: Docket Mo. 50-220 LER 78-019/01T-0 8eatI. hh,. G.We/I.:

M1 Su/u.ng /Iodine bhutdoIIin ope/Iatioie t pe/i(o/cmance o( su/I. v

-hfST- V 1 , )ouIId o

~ nee, one. hIJd/uxuEic dnubbe/I. (31-HS-1) ~n Che FeedIIIatet Sgkeiii dQconn.ec,ted gfi.om Xhe pipe eo~ and emmy o( $ Gu.d.

TRQ aitubben. ~ a. specie FLg. 201 Gtu'.nneLL Hcgd/Ia~c Shock and SII'ag SuppjI.mao/I., ai.ze 2 1/2 anchet eL51 a 5 inch sWoke.

Qb/ui.tion im Xhe )eedw'ate/I, ape had Loosened the nut on Che bosom o) Che pipe colum, eventuaLCg camping M Xo chop o($ . Tlu',s +Lowed Che hyd/Iau&c snubbe/I. Xo dQ eonne& II/Lom the co~. A (cuLed p~Xon cyLindet Cegon o-/I.ing /I.m~edkn She )ZIu.d Lou.

7n accordance ~vs Che /Lequi/I.enieet o$ TechI1icaL Speci. pe~on 3.6.4d, Che anubbeii. Ieu /I.epfaced pju.o/I. Xo /Leac,to/I. a~up. TRQ coII~ion

/I meed in Iiu.n.UIIaL wa)e,tIJ 4 npMeatioas.

Ve/I,g .ttculy you/w, ORIGINAL SIGNE17 BV R.R. SCHMEIOER R.R. Schnc,idetI.

Vice Peed.ideii.t-EZee.tru.c P/I oduc,tioi1

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