ML19343A226

LER 80-030/03L-0:on 800812,during Routine Operation, Containment Air Temp Exceeded 120 F.Caused by Svc Water Temp Control Valve to Reactor Bldg Closed Cooling Water Heat Exchangers Being Set Too High.Valve Readjusted

ML19343A226
Person / Time
Site:	Millstone
Issue date:	09/08/1980
From:	Harris J NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19343A219	List: ML19343A218 ML19343A223 ML19343A224 ML19343A226
References
LER-80-030-03L, LER-80-30-3L, NUDOCS 8009160469
Download: ML19343A226 (1)

Text

NRC FOHM 366 - u * ** w w s a a a 6 w w wa e wa

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- (7;77) *

• x LICENSEE EVENT REPORT 1 1 -

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ccNTRol Block: l 1

l l l l l lh 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFoRMATioN)

.7 I0 l18 l9l Cl Tl'M l N l S i 142 l@l LICENSEE CODE 15 Ol 01 -l 0lLICENSE 01 01 0 l - l 0 l 0 l 250 l@l NUMsER 26 4 ILICENSE I l 1 TYPE l1 l1JOl@l57 CAT l 58 l@

con'T l0lt1 7- 8 2e7'- 60 l L @l610 l 5 l DOCK 0 l 010 l 3 I 3 1668 l@l ET NUM8 ER 69 0 I EV8ENTl 1O ATE l ? l A 74I o l@l 75 OREPORT l 9 DATE l 0 l 8 l808 l 0 l@

EVENT DESCRIPTION AND pro 8ASLE CONSEQUENCES h Ioi2l l During routine power operation the containment air temperature was found to be in excess l -

i o l a 1 l of the limit of 120*F as specified by Tech. S'pec. 3.6.1.5. The service water temper- .l l o 14 l l ature control valve to Reactor Building Closed Cooling Water (RBCCW) heat exchangers wasl loIsl I found to be set too hich. The temoerature control valve required adjustments to lower i lolsI! containment temoerature to less than 120*F within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Maximum temoerature was  !

I o l 7 I i 120.4 degrees. Similar events: LER 80-03, 78-31. l I

I o la i I S$0E CCOE SU8CO$E COMPONENT CODE SUSCOdE S E loist 7 8 i w I 10A l@ l Al@. I B l@ l vl Al LI VI El X l@ l B l@ [G_J 9 11 12 13 18 19 20 SECUENTIAL CCCURRENCE REPORT REVISION EV ENT YE AR REPCRT NO CODE TYPE NO.

LER

. @ sg/*Oa i 81 01 1-1 101310l 1/1 1013I lL l l-l l Ol

~1 22 23 24 26 27 28 29 30 31 32 T K N AC C C P' NT VET HOURS S S I E PCR\ 8. S PPLif MAN FAC URER LeJ@Ll]@ L1J@ LLJ@ l 0101010 I 37 I41 NI@ lNl@ lAl@ l44K l 1 l 2 l 547[@

, 33 04 35 36 40 42 43 CAUSE oESCRIPTICN AND CORRECTIVE ACTIONS .7 li l o l l Plant conditions criar to refueling resulted in increased heat load on RBCCW with I t i t i i i resultant decrease in coolino availability to containment. The temoerature control I li 121 I valve was readjusted and normal containment temoeratures restored.  ;

is t ai I i t i l41 I l 7- 8 9 30

$A S  % PowtR CTHER STATUS IS RY OISCOVERY CESCRIPTION Ii is *l l El@ l1 10 l0 l@lM NA l l A l@l Ooerator Observation [

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l1 16 I W @O CP RELEASE AVOUNT lZl@lNA OF ACTIVITY l @NA l

• l PERScNNEt ExPcSOES NUMBEn TvPE li 171 l 0] 0 l 0 l@l 2Z l@l"ceSCRiPTicN @ NA **

l PERScNNEt inn.' RIES Nuv.ER oESCmPTio~@

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' ITTolINf81 7 8 9 ISSUE CE CRIPTION to WJ" 30 A NA l 68 69 ll ll 1ll1ll1il} .83 3 ,

. . . w m m - ., J.S. Harris py.p 203/447-1791 1