05000336/LER-1980-003-03, /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

/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: 05000336/LER-1980-003, Forwards LER 80-003/03L-0 05000336/LER-1980-003-03, /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
References
LER-80-003-03L-01, LER-80-3-3L-1, NUDOCS 8003030470
Download: ML19294B489 (1)

LER-1980-003, /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

Event date:
Report date:
3361980003R03 - NRC Website

text

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EVENT DALE 74 75 fili'OR T DAT E C0 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

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.

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34 3G 31 40 41 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

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[ 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.

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8 9 11 12 80 LO*S OS OR DAMAGE TO FACILITY 800s og g gg y

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8 10 80 PUDL ICITY NRC UsE ONLY DESCHIPTION ISDdE DL_l81 "A

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8 9 10 60 69 E0 5 Robert A. Stratman 203-447-1791 i

NAME OF PREPAnEn PHONE:

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