ML20084B270

LERs77-019 & 020:on 770427,two Containment Oxygen Sampling Sys Check Valves Leaked in Excess of Single Valve Criteria. Cause Not Stated.O Rings Replaced & Valves Retested

ML20084B270
Person / Time
Site:	Nine Mile Point
Issue date:	05/01/1977
From:	Bartlett J NIAGARA MOHAWK POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
77-020, 77-20, LER-77-019, LER-77-19, NMP-0022, NMP-22, NUDOCS 8304060230
Download: ML20084B270 (2)

Text

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LICENSEE EVENT REPORT CONTROL 'DLOCX:l l l l l l Q[PLEASE PRINT ALL REEUIRE31NFORMATION)

'1 6 4 AIE tcENSE NUMBER E TY ei IN lY lNl Ml Pl 1l l l l-l l l l l l-l l l l 4l 1l1 l1 l1 l l0l1l 7 09 14 15 25 26 30 31 32 CATECOnY Typf ION DOCnET NUMorn EVENT DATE REPORT AT D 1 COtrT l - l - l 7 8 57 58 W lL l l0 l5 l0 l-l0 l2 l 2 l 0 l 59 60 61 68 l 0l 4l 2l7 l7 l7 l l 0 l 5 l 1 l [) lE7l 7l 09 74 75 80 EVENT DESCAIPTION ap l During routine Type C isolation valve leak rate tests, two containment oxygen sampling; 7 89 co gg l system check valves indicated leakage in excess of the single valve criteria in l 7 H9 80

@l Technical Specifications of 12.9 SCFH @ 22 psig. Leakages were 64.3 SCFH and 14.1 l 7 89 83

@l SCFH respectively. l 7 89 83 gl LER 77-19, 77-20 l 7 89 Pavt

• 80 DI CODE COMPONENT COE,E SU R MA h VOLATON

@ lS lD l [_Ej l V l A l Ll Vl El 4 lAl lXl9l9l9l l Nl 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION B0 l "0" rings were replaced and the valves were retested to indicate leak rates ~of l 7 89 80

@l 7 89

.018 SCFH and .004 SCFH respectively.

b3 l

8I I STAT s  % POWER OTHEn STATUS D SCO EAv O!SCOVERY DESCAiP10N 7 8 9

(_GJ l0 l0 l0 l 10 12 13 l NA l 44 l Bl 45 46 l NA l 80 E f. SED Or E ASE AVOUN1 OF ACTMTY LOCATON OF RELEASE 7 8 9 W Wl10 11 NA l 44 l

45 NA l 80 PERSONNEL EXPOSURES NUM E1E R TY PE DESCA PTON M I010lol 7 89 11 LZj 12 l

13 NA l 83 PERSONNEL INJURIES NUMBER DESCAlpTCN

@ l0 10 l0l l NA 7 89 l

11 12 80 XXX%XE CONSEQUENCES PROBABLE Ql NA 7 89 l

80 LOSS OR DAMAGE TO FACILITY h PE DE SCAIDT ON

@ lZj l NA l 3 eo 10 Bo PUDLICITY

@l "8 NA "U

l 8304060230 770501 AcamONAL FACTORS PDR ADOCK 05000220 l NA l 7 US 80 81 7 89 80 l

NAME: PHONE:

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0 NMP-0022

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NIAGARA MOHAWK POWER CORPORATION

' NI AGAR A MOHAWK @ dj 300 Erit 90VLEVARD. WEST SYRACUSE N Y.13202 M1y 10, 1977

.c.,i')

. . 's -i Mt. James P. O'Reilly ' * $.

Director y#? qi ,A 0 United States Nuclear Regulatory Comission #:, r' h j? .,YG Region 1  %

N '** e #

631 Park Avenue King'of Prussia, PA. 19406 ,

RE: Docket No. 50-220 ~ ,' " , * . . ??

Dear Mt. O'Reiity:

. In accordance with Nine Mile Point Nuclear Station Unit #1 Technical Specification, we hereby submit Licensee Event Reports, LER 77-19 and LER 77-20.

These reports were completed in the format designated in the Licensee.

Event Report Instruction Booklet 00E-SS-001, dated October 2974, re-vised December 8, 1975.

Very truly yours,

. p -tv a /( i uMk J. Bartlett Executive Vice Pre 4ident for R.R. Schneider Vice President -

Electric Production MAS /ntm Enc.

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l 771360237 b _ _ . _ ')