ML20085G762

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Telecopy AO BFAO-7312T:on 730912,reactor Bldg to Suppression Chamber Vacuum Breakers Failed.Caused by Failure of Differential Pressure Switches PdIS-64-20 & PdIS-64-21. Switch Failure Under Investigation
ML20085G762
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 09/12/1973
From: Green H
TENNESSEE VALLEY AUTHORITY
To:
US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20085G751 List:
References
AO-BFAO-7312T, NUDOCS 8308290339
Download: ML20085G762 (1)


Text

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239P EDT SEP 12 73 AB120 AAA160(1534)(2-158170E255)PD ~

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O SUBJECT BFAO-7312T. AT 400AM 9-12-73 DURING REACTOR C00LDOWN THE REACTOR BUILDING TO SUPPRESSION CHAMBER VACUUM BREAKERS O

FAILED TO OPERATE. THE OPERATOR OPENED THE - VACUUM BREAKERS AT MINUS 0.6 INCHES OF WATER TO RELIEVE THE DIEEERENTIAL PRESSURE. O THE VACUUM BREAKERS FAILED TO OPERATE BECAUSE DIFFERENTIAL PRESSURE e SWITCHES PDIS-64-20 AND PDIS-64-21 FAILED TO OPERATE. THE REASON g FOR THEIR FAILURE IS BEING INVESTIGATED. THE REACTOR WAS SHUTDOWN 7iaci psen G

AND LESS THEN 212 DEGREE F O

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