ML20054F779

LER 82-013/01T-0:on 820528,preliminary Analysis of Piping Load Evaluation Per NUREG-0737,Item II.D.1 Indicated Allowable Stresses Will Be Exceeded on Pressurizer Safety Loop Seal Piping When Safety Valve Opens.Analysis Underway

ML20054F779
Person / Time
Site:	Kewaunee
Issue date:	06/11/1982
From:	Bernhoft S WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20054F765	List: 05000305/LER-1982-010, Forwards Updated LER 82-010/03X-1 & LERs 82-012/03L-0 & 82-013/01T-0 05000305/LER-1982-012 05000305/LER-1982-013
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.D.1, TASK-TM LER-82-013-01T, LER-82-13-1T, NUDOCS 8206170314
Download: ML20054F779 (1)

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It 60 Li DO(.K ET NU' ALE f t 'E we EVENT DATE #4 6 , HLPotti DAI E EVENT DFSCRIPTION AND PROBABLE CONSEQUENCES h fol2l l Preliminary analysis of piping load evaluation done in accordance with NUREG-0737, Iteml

,oi3; lII.D.1, indicates that allowable stresses will be exceeded on the pressurizer safety l

3 g , ; ;1aop seal piping when a safety valve opens. This event occurs as a result of assuming l

,ogsg lthe cold loop seal water clears the safety valve in an overpressure transient and the l f o I r> l l valve lifts with stsam to accelerate the slug of water through the downstream piping. l

, o g ,; g This event is reportable per Technical Specification 6.9.2.a.9.

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, g7; lat power show the temperature in the pressurizer vault in excess of 150*F and could I g,;3, lpossibly change the results of the analysis. Final analysis *and recommendations are l g.,g,j lnot Complete and an update report will be submitted. I 7 8 3 8o STA 5 . POWER OTHER STATUS Ol5CO RY DISCOVERY CESCRiP TION

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