ML20207S538

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Telcon W/J Shea,M Lederman,M Chi,N Jain,P Blasioli,J Rader, J Bickel & D Massiani on 870225 Re Valves 1-RR-2A & 1-RR-2B
ML20207S538
Person / Time
Site: Millstone Dominion icon.png
Issue date: 03/17/1987
From: Kelly G
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 8703190647
Download: ML20207S538 (1)


Text

s March 17, 1987 Docket No.: 50-245-NOTE T0: File FROM: Glenn Kelly

SUBJECT:

MILLSTONE 1 VALVES 1-RR-2A and 1-RR-2B TeleconbetweenGlennKe'lly(NRC),JimShea(NRC),MitchLederman(NNECO),

Mike Chi (NNECO)..Nurmal Jain(NNECO), Paul Blasioli(NNECO), Jan Rader(NNECO),

JohnBickel(NNECO),andDickMassiani(NNECO).

Telecon date: February 25, 1987 For small breaks less than 0.lft , worst SF is gas turbine generator failure.

Cannot be assured LPSI lo~op selection will choose right loop for this range of breaks. So only have DG, I core spray, and some LPCI flow (which makes it worse). Do not exceed 2200 F for Appendix K.

For old calculation of large breaks greater than 0.lft , LPSI valve failure (10A or 108) was worst single failure. Then if fail 1-RR-2A or -2B, it makes no difference since have already failed injection. If, however, assume 1-RR-2A and -2B fail due to their harsh environment, then gas turbine generator failure is the worst single failure and PCT exceeds 2200 F for Appendix K calc.

and B.E. calculations.

cc: Docket File ISAPD File PDR J.Shea LPDR m

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