ML19294B489

LER 80-003/03L-0:on 800122,during Routine Power Operation, Containment Air Temp Found in Excess of 120F Limit.Caused by Adjustments to Svc Water Temp Control Valve for Reactor Bldg Closed Cooling Water Sys.Valve Readjusted

ML19294B489
Person / Time
Site:	Millstone
Issue date:	02/21/1980
From:	Stratum R NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19294B487	List: ML19294B486 ML19294B489
References
LER-80-003-03L-01, LER-80-3-3L-1, NUDOCS 8003030470
Download: ML19294B489 (1)

Text

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COrfinOL DLOCK: l l l l l l l (PLEASE PalNT OH TYPE ALL REQUIRED INFOnf3ATION)

I o I i l IC lT in p p la l@l 0 10 l- 10 10 10 10 l- lo 10 10 l@l 411 11 11_L1_l@L_L_1 57 CAI Stl 8 9 LICENGEL CODE 14 15 LICt NLE NUMuLH 25 2b LICENSL ivrE JO CON'T JoIiI8  ;'s 's [L j@l 0 l 5 l010 l0 l3 l3 l6 l@l0 Il 12 12 18 10 ]@l0lPl2l1l810l@ C0 60_ bl DOC AE T NUMBI H UJ 6') EVENT DALE 74 75 fili'OR T DAT E EVENT DEsCntP1lON AND PnODARLE CONSEQUENCES h I o 12 l l During routine power operation the' containment air temperature was found to be in I o 3 l excess of the limit of 120 degrees F as specified by Technical Specification 3.6.1.5. I io p g l The service water temperature control valve to the Reactor Building Closed Cooling i j o ;,; i Water (RBCCil) heat exchangers was found to be set too high.

The temperature control l Io lc i I valve was adjusted and containment temperature lowered to less than 120 F within f o 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Maximum temperature was 120.8 degrees. I 7J l I o la I I I

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• C$IE' '^85E C cuC$$E COMPONENT CODE $UBC E S DE o o I w l A l@ (A_j@ [jlj@ l V l A li. IV IE lX l@ la l@ lfG_j @

7 8 9 10 11 12 13 18 10 20 SEQUE N TI AL OCCUH ft E NCE HEPORT fiEVISION *

,_ EVENT YE AR HEPOR T NO. 0005 TYFE f 40.

@l=LERiRO  ; 18 10 I

_ 21 22 l-l 23 1010 l'3 I 24 26

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27 10 13 i 28

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4 LL_I 30 l-1 31 LO_1 32 EKEf 'ACT P O PLANT

• i HOURS 22 5 t i 1Et F . 5011 PPLt F4 MA FACTUnER

[E 33 _

jgj Zjg 34 l35 Zlg [Zj@

3G l 0 l 0-l 0 l U l 31 40 Ug 41 O@ U@ lKl1l2l5l@

42 43 44 47 cAUSE DESCnlPTION AND CORRECTIVE ACTIONS li lo l 1 The high containment temperature was the result of adjustments to a service water [

[ 3 li j l temperature control valve for the RBCCU System. The temperature control valve had I

,,,,,i been previously adjusted to increase the temperature of several components being l

, , , .,, y supplied by the RBCCW System. The temperature control valve was readjusted and nomal I g , y,i ; containment temperature restored. [

7 8 9 CO A S  % POWE R ' O ' hen STATUS 15 0 IY DISCOVERY DESCillPTION I116 l [E J@ l ll 0 l 0 l@l fd l [A_j@l Operator Observation I ACTIVITY CO TENT nEtt AsEn OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF FIEt EASE

[TTc1 l zj @

7 8 9 10 Zlgl 11 na 44 I l 45 na

. 60 i

PEH50NNEL F XPOSU5tES NUMBER TYPE DE SCFttPTION i 2 10 10101@LZ J@l " i PE nsONd'IN,ULS

• stn i a 10 No~0 1 0 lgloEscitiPriON@ nA l 7 8 9 11 12 80 LO*S OS OR DAMAGE TO FACILITY y mSCniP nON g 800s og g gg ,

p 8 10 80 PUDL ICITY NRC UsE ONLY DESCHIPTION *

"A 111111117 2 o ISDdE DL_l81 I Illi 7 8 9 10 60 69 E0 5 Robert A. Stratman 203-447-1791 i NAME OF PREPAnEn PHONE: o -

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