ML20057C722

Forwards Application for Amends to License NPF-29,requesting TS Change to Remove Surveillance Requirement 4.4.1.2.2 Due to Problems Encountered W/Jet Pumps Differential Pressure Instrumentation Measurements

ML20057C722
Person / Time
Site:	Grand Gulf
Issue date:	09/23/1993
From:	Hutchinson C ENTERGY OPERATIONS, INC.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20057C723	List: ML20057C722 ML20057C728
References
GNRO-93-00118, GNRO-93-118, NUDOCS 9309290302
Download: ML20057C722 (3)

Text

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Entergy Opwations Inc.

= ENTERGY eo ex 7co -

Port G bson MS 39150 W 601437 2800 ,

C. R. Hutchinson m Wsour.

O,varawe Cram G# NKEijt EUh3r.

September 23,1993 U.S. Nuclear Regulatory Commission Mail Station P1-37 .

Washington, D.C. 20555 Attention: Document Control Desk

SUBJECT:

Grand Gulf Nuclear Station Unit 1 -

Docket No. 50-416 .

License No. NPF-29 Request for Technical Specification Change to Remove Surveillance Requirement 4A.1.2.2, Jet Pump Differential Pressure l

Measurement Below 25% Power (PCOL-93/12)

GNRO-93/00118 Gentlemen:

Following a series of telephone conferences on September 20,1993, NRC Region ll granted enforcement discretion from the Grand Gulf Nuclear Station Technical Specifications (TS) Surveillance Requirement 4.4.1.2.2 due to -

problems encountered with the jet pump differential pressure instrumentation measurements. The TS requires that differential pressure measurements be '

taken on each of the individual jet pumps within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after entering OPERATIONAL CONDITION 2 and at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> thereafter.

l In order to avoid similar situations in the future, we are proposing herein that the l subject surveillar2ce be removed from the GGNS TS and replaced with a l provision which would allow the surveillance to be performed within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after achieving 25% Rated Thermal Power or within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of placing an associated recirculation loop in service. l The proposed change, for all practical purposes, is an administrative change to adopt a provision that has previously been approved generically in NUREG 1434, improved Technical Specifications. GGNS is the lead plant for the BWR Improved Technical Specification Program and would have included the enclosed change as part of that effort in early October of this year. However, i the potential for recurrence of the differantial pressure measurement difficulties  ;

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l September 23,1993 GNRO-93/00118 Page 2 of 5 l

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Improved Technical Specification Program and would have included the enclosed change as part of that effort in early October of this year. However, the potential for recurrence of the differential pressure measurement difficulties now dictates that we pursue this change early.

The attachment to this letter provides the marked up TS pages and the safety basis for the proposed change.

This request has been reviewed and accepted by the Plant Safety Review Committee. Based on the guidelines of 10CFR50.92, Entergy Operations has concluded that this request involves no significant hazards considerations.

Yours truly,

, n

/JO attachments: 1) Affirmation per 10CFR50.30 l 2) GGNS PCOL-93/12 l 3) Mark-up of Affected Technical Specifications

4) Sample Proposed Technical Specification Pages l

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September 23,1993 GNRO-93/00118  ;

Page 3 of 5 cc: Mr. R. H. L < 1ard Mr. H. W. Keiser  !

Mr. R. B. McGehee j Mr. N. S. Reynolds Mr. H. L. Thomas Mr. Stewart D. Ebneter Regional Administrator U. S. Nuclear Regulatory Commission Region ll 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Ellis Merschoff Director, Division of Reactor Projects U. S. Nuc'sar Regulatory Commission Region 11

! 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 Mr. P. W. O'Connor (w/2)

Office of Nuclear Reactor Regulation l U. S. Nuclear Regulatory Commission Mail Stop 13H3 Washington, D.C. 20555 Mr. Dave Verrelli Chief, Branch 1 Division of Reactor Projects U. S. Nuclear Regulatory Commission l Region 11 101 Marietta St., N.W., Suite 2900 Atlanta, Georgia 30323 1