ML19275A050

LER 79-052/01T-0 on 790809:review of OL Amend 4 Indicates That 12 Inch Per Minute Rise Rate Restriction May Reduce Margin for Loss of Normal Feedwater & Main Feedline Rupture Accident.Nrc Should Issue OL Mod

ML19275A050
Person / Time
Site:	Salem
Issue date:	08/23/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19275A047	List: ML19275A046 ML19275A050
References
LER-79-052-01T, LER-79-52-1T, NUDOCS 7908300636
Download: ML19275A050 (1)

Text

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Report Number: 79-52/01T Report Date:

8/23/79 Occurrence Date: 8/09/79 Facility: Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Steam Generator Rate of Rise Restriction CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 5 DESCRIPTION OF OCCURRENCE:

After reviewing Amendment No. 4 to our Operating License DPR-70 with respect to any effect which it may have on presently performed safety analyses, we have concluded that the imposition of the 1.2 inches per minute rate of rise restriction may present an unreviewed safety question in that the margin presented in the safety analysis for loss of normal feedwater and main feedline rupture accidents may be re-duced.

DESIGNATION OF APPARENT CAUSE OCCURRENCE:

This restriction was placed upon the Salem Unit No. 1 to provide an added margin of assurance that design modifications implemented to preclude steam generator water hammer would be effective.

ANALYSIS OF OCCURRENCE:

Confirmation by Westinghouse Electric Corporation will be necessary before formal identification of this issue as an unreviewed safety question can be made.

CORRECTIVE ACTION: .hh Based on the Technical Evaluation, Salem Unit No. 1, January 1979, EG&G Idaho, Inc. which was performed for the NRC, the NRC should unilaterally issue a modification to the Operating License lifting the rate of steam generator water level rise restriction.

7 9083 0 043G ,

LER No. 79-52/OlT FAILURE DATA:

Not Applicable

/

Prepared By A. W. Kapple i , / [r. -

1 -

Manager,- Salem Generating Station SORC Meeting No. 67-79 2031 360

NRC FOMM 366 LICENSEE EVENT REPORT C[ *

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l o 3 l Operating License with respect to any effect it may have on presently performed o 4 l safety analyses. We conclude that the imposition of tv.e 1.2 inches / minute rate of l l

0is l ris( restriction may present an unreviewed safety question in that the margin This is the first j 0 6 presented in at least two safety analyses may be reduced.

l oI7 l occurrence of this type.

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42 43 Nl@ 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h it o lThe restriction was to provide an added marain of assurance that desian modifications 1 i i limolemented to prec'.ude steam generator water hammer would be effective. Based nn the i 1

7 l Technical Evaluation, Salem 1].:it No. 1, Januarv 1979 FC&G Tdaho. Inc. which was nor-3 3 l formed for the NRC, the NRC should unilaterally issue a modification to the Onernrinel i A ] License lifting the rate of steam nenerator water level rise restriction 80 I

7 a 9 OTHER STATUS ISCO RY DISCOVERY OESCRIPTION

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