05000327/LER-1980-064-03, /03L-0:on 800508,all Zones of Ice Condenser Were Giving Open Door Alarms.Probably Caused by Warm Air Leaking Into Lower Portion of Ice Condenser.Affected Doors Were Blocked Closed

/03L-0:on 800508,all Zones of Ice Condenser Were Giving Open Door Alarms.Probably Caused by Warm Air Leaking Into Lower Portion of Ice Condenser.Affected Doors Were Blocked Closed

ML19323H044
Person / Time
Site:	Sequoyah
Issue date:	06/06/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323H041	List: 05000327/LER-1980-064, Forwards LER 80-064/03L-0 05000327/LER-1980-064-03, /03L-0:on 800508,all Zones of Ice Condenser Were Giving Open Door Alarms.Probably Caused by Warm Air Leaking Into Lower Portion of Ice Condenser.Affected Doors Were Blocked Closed
References
LER-80-064-03L, LER-80-64-3L, NUDOCS 8006110223
Download: ML19323H044 (2)

LER-1980-064, /03L-0:on 800508,all Zones of Ice Condenser Were Giving Open Door Alarms.Probably Caused by Warm Air Leaking Into Lower Portion of Ice Condenser.Affected Doors Were Blocked Closed

Event date:
Report date:
3271980064R03 - NRC Website

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," / * 'S:qu:ych Nuclosr Plcnt e-LER SUPPLEMENTAL INFORMATION SQRO-50-327/ 8064 Technical Specification Involved 3.6.5.3 Reported Under Technical Specification 6.9.1.13.b Date of Occurrence: '5/8/60 Time of Occurrence: 2230 CDST Unit 1 Identification and Description of Occurrence:

At 2230 CDST, all zones of the ice condenser had open door alarms.

Conditions Prior to Occurrence:

Mode 4 RCS Tavg - 3400F, pressurizer pressure - 730 psig Apparent Cause of Occurrence:

Doors were caused to open due to excessive leakage of air from the upper compartment to the lower through missile shields. This air was picked up by the CRDM cooling fans.

Analysis of Occurrence:

There was no danger Le sle public health and safety.

Corrective Acticn:

The missile barrier seals are being replaced and made effective.

Failure Data:

N/A e

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