ML20140G343

PNO-75-053:on 750720,during Attempt to Reseat Leaking Relief Valve D,Valve Manually Actuated & Did Not Reseat.Reactor Manually Scrammed.Investigation Continuing

ML20140G343
Person / Time
Site:	Pilgrim, 05000000
Issue date:	07/21/1975
From:	Adreher F, Jennifer Davis, Thornburg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
Shared Package
ML20140F372	List: ML20140F369 ML20140F376 ML20140F485 ML20140F505 ML20140F512 ML20140F516 ML20140F522 ML20140F533 ML20140F546 ML20140F559 ML20140F580 ML20140F593 ML20140F603 ML20140F628 ML20140F657 ML20140F689 ML20140F695 ML20140F724 ML20140F750 ML20140F770 ML20140F788 ML20140F807 ML20140F950 ML20140F981 ML20140G002 ML20140G028 ML20140G069 ML20140G098 ML20140G110 ML20140G170 ML20140G175 ML20140G183 ML20140G188 ML20140G202 ML20140G215 ML20140G221 ML20140G226 ML20140G231 ML20140G236 ML20140G241 ML20140G253 ML20140G259 ML20140G264 ML20140G268 ML20140G274 ML20140G280 ML20140G286 ML20140G303 ML20140G325 ML20140G330 ... further results
References
FOIA-85-665 PNO-75-053, PNO-75-53, NUDOCS 8604020191
Download: ML20140G343 (35)

Text

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, k l 'i s TRELIMINARY NOTIFICATIOS OF EVEN! OR ENESUAh OCCGRINCE -F5-75-53 6 F \\ I f- 5 This oreliminarv notificatien constitutes EARI.T notice of event 3 c. ,

f fF '( POSSI3LE safetv or cublic interest sicificance. ne infer:atien g oresented is as init4*117 received withcut verificatien er evaluati., Dy j j

h \- and is basically all that is k=c m by OIE s:af f as of 1:30 9.:. en the 1NN date of this notification. IT SECUID BE 5FIC1FICALLY Nww ~ EAT ~EIS I i NOTIIICATION MAY CONTAIN INF03MATICN TEAI 1.CER MAY 3E Dr.ur/!ED 20 {

$ D BE INACCURATE OR INCOSSISTENT. AN CFFICE 0? T5SPECI' ION A'O IFFORCD.rM M E \ NOII?ICATICN OF AN INCIDIST OR OCCUR 3.EICE (3LUE w . .tti) SE3SIQUWilT I 3 s VILL ZE ISSUED IF WARRAMw. -

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- NI i 1

\ Facility: Pilgri= 1 ,

i 8esten Ediscu Ccepany

!l 4 Subiect: BIND 0VN DUE TO FAILUEE OF A SAFETT/ RELIEF VALVE TO TdSEA'

.; FOLLCVING MANUAL _L605 l l

The licensee reported that at 12:55 p.n. en July 20, 1975, during* an attenpt to ressat the D relief valve which was observed to be le2*3, s,,, the valve was manually actuated; havever, it did not reseat. The reac- ,

i 1

ter was nanually scra:=ned. ne attempt to properly rescat the relia! -

5 . valve was conducted at operating temperatura and pressura and a rasctor

pcwer level of 54

. The reactor pressure was reduced fren 980 psig to

. 200 psig at which tine the valve elesed. All systens operated nor: ally 5 ]

during the shutdown. No er.arge=cy systens vers requirad. The suppres-sien pool te=perature reached a ta=perature of 112 degrees 7 during the' .g blesdevu. ne licensee is investigating the cause of the valve failure

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- 8 Region I axpects the plant to be shutden i

- [ ,and the for effects 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />._of the blev.cwn. .. . .

I Media interest is expected because of news attenties being given to {

Pilgrin 1. ,

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E na State of Massachusatts is being kept informed. A press releap is not planned. ,

OIE received notification of this cecurrence by telephone froma the licensee at 1.1:50 a.n. en July 21, 1975.

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contact: TAdreher, 1E 27261 HIrrhornburg, IE 27353 JGDavis, II x7541 Distribution: .;

[ Chair:an Anders Cemissioner Mason S. J. Chili, SECT 5 Cecnissioner Gilinsky Cc:nissicuer Revden G. Y. Furthv, JCAE

^~

[

E Cc==issicnef Kectedy C. C. Ka:: merer, CA ls L

= L. V. Cossick, EDO D. F. Ecuth, II J. A. Harris, PA 1

[.- ~ B. C. Resche, FRR H. H. Brevn, ISP T. J. McTiernan, AIA j j K. R. Chap.lan, 3 MSS E. K. Shapar, EI.D ,

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j Transnitted: ? Bldg  ; E St  ; MK33  ; Luze - fI

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t i PRELIMINAKT N(r!ITICATIC3 - NO TOR PU3LTC DISCLOSURE &

• t g b 8604020191 860114 l!

. PDR FOIA PDR FIRESTO85-665

i r.uLwi.u=.s .wue swsw .m ,w . - - -. - g

• '~ - July 21, 1975 (Q'g , ,,5) .J V* 1 h

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FRELIXCIART 50TITICAIIO5 07 EVEN! OR ExtSUA1. OCCURRE' g I

- \ This prelininarv notificatics constitutes EARLT notice cf event 3 c- -

f

(

i POSSI3LE sa.fotv or cublic interest sisnificance. The infer:atienN j presented is as initially received witheet verificatien er evaluatic:.

k and is basically all that is be n bv OIE s:af f as of 1:30 0.n. en ths y[

I i N dte of this notification. IT SECUG BE SPIC 1 fit'til? Non u ~ EAT 2IS N

NOTIIICATION MAY CDNTAIN INFCEMAHCN IFLT 1.LTER MAY 3E DuufTYED TO {

t D EE INACCURATE OR INCONSISTD'T. AN CTFICE C? IN5?ECTION A'O IFFORCEhh

\ NOTIFICATION OF AN I5CIDINT OR OCCURREICE (3trE sen.D SUBSIQNT i

,; VILL 3E ISSUED IF WAR'G'u.a . n N Facility: Pilgri: 1 N 3 Bosten Edison Cenpany - }

h Subiect: BIGDOWN DUE TO FAIGRE OF A SA?ETT/ RELIEF VA151 TO RESIAT f

FOLLC%'I5G MANUAL ACTUATION

- l The licensee reported that at 12:55 p.n. cn July 20, 1975, during an atte=pt to ressat the D relief valve which was obsez sed to be les'dng, the valve was manually actuated; hcwever, it did not reseat, ne reac- 'i

(

-- ter was naz:ually scra=med. The attempt to properly resent the relia!

talve was conducted at operating temperatura and pressure and a rasctor wer level of 541. The reactor pressure was reduced frem o80 psig to 200 peig at which tine the valve c1csed. All systees operated nor: ally during the shutdown. No er.ergency systema vers required. The suppres- {)

3) sien pool te=perature reached a ta=perature of 112 degrees 7 during the' .gl bicudevu. ne licensee is hvestigating the cause of the valve failure i M_ Regicu I expects the plant te be shutdevn

['and tha for 48effects hours. of the bicvdewu. ._ ,, ,

Media interest is expected becausa of news attentien being given to I Pilgrin 1. ,

The State of Massachusett: is being kept informed. A press releasa is not planned. , .

CIE received notification of this cccurrence by telephone from the licensee at 11:50 a.m. en July 21, 1975. ,

Contact:

TAdreher, IE 27261 EDThornburg, IE 27353 JGDavis, II x7541 l

Distributicu:

Chairman Anders Ccmissioner Mason S. J. Chili, SECT i Cec =tissioner Gilinsky Cemissioner Revden G 7. Murphy, JCAI .' l  :

Co=issionef Kecnedy C. C. Ea= merer, CA f

D. F. Ecuch, II J. A. Harris, PA $

L. v. Cossick, EDO

, - '- B. C. Resche, l32 H. H. Brevn, ISP T. J. McIiernan, AI). .I I

K. R. Chap.5an, 25$ H. K. Shapar EG .

I Transnitted: ? 31d3 _; E St  ; MN33  ; Luge f gi PRELIMINar mmCAnC3 - No; FOR MCC MSC:.CSTRE ic, t

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