ML20214H942

Demands Proof That Stated Circumstances Cannot Occur Prior to Issuance of Low Power License,Including Valve Failure Permitting Loss of Coolant from Reactor Core Through Failed Valve

ML20214H942
Person / Time
Site:	Pilgrim
Issue date:	04/28/1987
From:	Piercebjorklun AFFILIATION NOT ASSIGNED
To:	Zech L NRC COMMISSION (OCM)
Shared Package
ML20214H933	List: ML20214H931 ML20214H942
References
NUDOCS 8705270552
Download: ML20214H942 (1)

Text

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Op e LANDO ZECH CHAIRMAN US NUCLEAR REGULATORY COMMIS$!ON O WASHINGTON DC 20555 9 O e o T SIR, O WE oEMANo PROOF PRIOR TO !$$UANCE OF LOW POWER LICENSE TO SEABROOK OR e P!LGRIM NUCLEAR STATIONS THAT THE FOLLOWING CIRCUMSTANCES CANNOT OCCUR',

O 1 VALVE FAILURE PERMITTING LOSS OF COOLANT FROM THE REACTOR CORE e THROUGH THE FAILED VALVE SO THAT EMERGENCY COOLANT ENTERING THE COOLER WOULO NOT ALSO EXIT THROUGH THE SAHE FAILED VALVE THEREBY O LE4v!NG THE CORE WITHOUT COOLANT. e 2 INcRFASE IN REACTOR CORE TEMPERATURE CAUSING THE ZIRCONIUM CASINGS ON URAN!UM RODS TO SWELL THEREBY BLOCKING PASSAGES BETWEEN RODS AND O PREVENTING EHERGENCY COOLANT FROM CIRCULATING THERESY RESULTING IN e UNCONTR0LABLE CHA!N REACTION AND MELTDOWN O e 13:23 EST O sGsCOsp e O e O el o e O

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