ML17053A237

Forwards LER#78-037/03L-0,#78-038/03L-0 & #78-039/03L-0

ML17053A237
Person / Time
Site:	Nine Mile Point
Issue date:	11/15/1978
From:	Schneider R Niagara Mohawk Power Corp
To:	Grier B NRC Office of Inspection & Enforcement (IE Region I)
Shared Package
ML17053A238	List: ML17053A237 ML17053A239 ML20062D282 ML20062D284
References
NUDOCS 7811210281
Download: ML17053A237 (4)

Text

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REGULATOR ORMATION DISTRIBUTION EM DOCKET NBR: PT-1 DOC DATE:

RECIPIENT: ACCESSION NBR: 7811 1 1 ORIGINATOR: CH I ~ ~

COPIES RECEIVED:

COMPANY NAME- NIAGARA MOHAMK PWR LTR 1 ENCL I

SUBJECT:

SI ZE: 1+3 LER878-037/03L-0 on 781027: test revealed tri set oint of 26.5 inches water on one vacuum switch in vacuum relief sys from pressure sup ression chamber to rx bldg. Caused b instru drift in a Mercoid Model CP4122 vacuum switch. Forwards LER//78-038/03L-0 6 f/78-039/03L-0. 8//P D$ 7- 6 NOTARIZED DISTR)CAUTION CODE I AOOP DISTRIBUTION TITLE~

INCIDENT REPORTS ENCL' FOR ACTION i

BR CH CL j~ ORB83 BC El> FIt F R PPR W/ENCL I LE H/p ENCL iNI PC W/3 ENCL L C SYSTEMS RR W/FNCL NOVAK/CHECK W/ENCL EEH W/ENCL AD FOR ENG W/FNCL PLANT SYSTF<S w/ENCL

'ANAUER "/ENCL AP FOi PLANT SYST EHS w/ENCL Ap FOR SYS L PROJ W/FNCL REACTnp SAFETY RR w/ENCL ENGINEERING BR W/ENCL KREGER/J COLLINS W/ENCL POKIER SYS BR W/ENCL E. Jordan W/ENCL LPOR W/ENCL NSIC W/ENCL ACRS ~/I6 ENCL TOThL NHHRER UF COPIES REQUIRFD t LTR ENCL NOTES:

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W] 7 NM,SsMA 4 ~ACTA'VK NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y. 13202/TELEPHONE (315) 474-1511 Novembe/L 15, 1978

&. Bogce H. Gtu.e/1.

8~ecto/I.

Unct'ed Situ Nuct!eaIL Regular/1y CommQamn Regin I 631 Po/I.k Avenue, King og PuL5a~, PA. 19406 RE: Socket No. 50-220 Sean, &. Gtu'.e/L:

In acco/uence <cith Nine NLe Point Nuct!eatL Techtu'.eaL S~n Speci,+cation(, ee he/ceby sub~ Che It'lolloping Licensee Unkt <1 Event Repo~:

78-37 I0hich w in vs~on o$ Section 9.9.6$ o) She TechnicaL S peci P cationb Iofu,ch m i.n acco/I.dance eM Section 6.9.2b(3) o( Che Techtu.cd Speci ff'Iicatiow 78-39 wctu'.ch m ~n vk.oLation o( Section 9.6.2A o) She TechIu'.ca('. Speci.+carom Thee aepo/Lt5 eer1e complied in Ae $ orunat designated an NUREG-0161, dated JuZIJ 1977.

Ve/cy ~y you/L5, ORIGINAL SIGNEV BY R.R. SCHNEIOER R.R. Schneide/L Vxce P/Lee&ent-H ectru.c P/production Attachm~ (9 copke5 each) xc: Smecto/I., 0)pce o( ISE (90 cop~e5)

Sme~x, 0(gce o$ h(IPC (9 copiee)

(7 771 LICENSEE EVENT REPORT CONTROL BLOCK: Qi (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

~01 7 8 9 N Y N LICENSEE CODE M

I P 1 14 Q20 15 0

6 0 0 0 0 LICENSE NUMBER 0 - 0 OQA 25 26 I I LICENSE TYPE 1 IQ4~I 30 57 CAT 58 CON'T

~0 0 5 0 o o 2 2 0 Q7 1 0 2 7 7 8 QB 1 1 1 4 7 8 Q9 QB 7 8 60 61 DOCKET NUMBER 68 69 EVENT QATE 74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO During normal operation, per formance of surveillance test Nl-ISP-IC68

~03 found a tr'i p setpoint of 26. 5 inches water on one vacuum switch in the vacuum rel ief system. from the pressure suppression chamber to the rx

~os building (68-12B) . T.S. 3. 3. 6F requires a setpoint less than or equal

~OB to 0. 5 pi sg (1 3. 85 inches water) . Thi s condition resulted in minimal

~07 operation of the vacuum relief valve.

~OB 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCOOE COMPONENT CODE SUBCODE SUBCODE

~09 7 8

~SA 9 10 QAA 11 E QIs

~Ebs 12 13 I N S T R 0 18 Q(4 ~SQls 19

~Z 20 S

SEQUENTIAL OCCURRENCE REPORT REVISION U ~>7 I.ER/RQ EVENT YEAR REPORT NO. CODE TYPE NO.

~~ ~o 32 21 22 24 26 28 29 30 31 ACTION .FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDA PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~Q21 0 0 0 U ~Q24 ~NQ2S 5 33 QIB ~XQI9 34

~Q20 35 36 37 40

~N 41 Q23 42 43 44 M 2 3 47 Q28 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 The cause of this failure,was instrument dri ft in a Mercoi d Model CP4122 vacuum switch. Trip setpoint was reset to 6 ' inches water.

Surveillance interval for; this switch has been shortened to monthly 3

until stabilization is achieved or a cause for the large drift is 4

determined.

~O 7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32 CD LJO I 5 E 2B 0 9 2 29 NA ~BQ31 45 46 Survei 1 1 ance Testing 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY Q NA LOCATION OF RELEASE Q Q33 ~ZQ34 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 ~00 0 Oss Z Qss NA 80 7 8 9 11 12 13 PERSONNEL INJURIES NUMBER OESCRIPTIONQ s ~00 0 Q4o 12 NA 80 7 8 9 11 LOSS OF OR DAMAGE TO FACILITY ~43 TYPE Z Q4, DESCRIPTION NA s s O ~ Is V81 1 210Z%5-5, 7 8 9 10 80 O

ISSUED uNQ44 PUBLICITY DESCRIPTION NA

~ NRC USE ONLY s

'7 8 9 10 68 69 80 o NAME DF PREPARER D. K. MacVi ttie PHQNE 31 5-343-,21 10 Ext. 1394 0 0