05000327/LER-1980-178-01, /01T-0:on 801031,containment Upper Compartment Temp Found Too Cool.Caused by Entering of Unit 1 Into Mode 1 W/Temp Too Cool.Upper Compartment Temp Increased Above Min Required Level

/01T-0:on 801031,containment Upper Compartment Temp Found Too Cool.Caused by Entering of Unit 1 Into Mode 1 W/Temp Too Cool.Upper Compartment Temp Increased Above Min Required Level

ML19345A903
Person / Time
Site:	Sequoyah
Issue date:	11/21/1980
From:	Cottle W, Kirk G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19345A899	List: 05000327/LER-1980-178, Forwards LER 80-178/01T-0 05000327/LER-1980-178-01, /01T-0:on 801031,containment Upper Compartment Temp Found Too Cool.Caused by Entering of Unit 1 Into Mode 1 W/Temp Too Cool.Upper Compartment Temp Increased Above Min Required Level
References
LER-80-178-01T, LER-80-178-1T, NUDOCS 8011250390
Download: ML19345A903 (1)

LER-1980-178, /01T-0:on 801031,containment Upper Compartment Temp Found Too Cool.Caused by Entering of Unit 1 Into Mode 1 W/Temp Too Cool.Upper Compartment Temp Increased Above Min Required Level

Event date:
Report date:
3271980178R01 - NRC Website

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REPCar 0Af t 67 tVE*4T OC$CntPT'ON At40 PACS AetE CONSECUENCES h lo,:1l Unit 1 in Mode I with Reactor Power at 29%. At 0430 CST on 11-1-80, containment upper ga g l compartment temperature was found to be 76.3 degrees F.

LCO 3.6.1.5.a requires the upper i

gn4,; l compartment temperature to be greater than SS degrees F when the unit is in Mode 1.

go93, ; Subsequent investigation revealed that Unit 1 had apparently entered Mode 1 at 0500 CDT j

l o is 1 -1 the previous day with r.he upper compartment temperature less than 85 degrees F in i

jaj,) ; apparent violation of LCO 3.0.4.

There was no effect upon public health or safety.

3;4; ; Previous occurrences - none.

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l i a i IThe upper compartment te=perature uns increased above 85 degrees F at 1445 cs; on 11-1-80.

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