ML20154K413

Responds to Generic Ltr 88-03 Re Resolution of Safety Issue 93, Steam Binding of Auxiliary Feedwater Pumps

ML20154K413
Person / Time
Site:	North Anna
Issue date:	05/23/1988
From:	Cruden D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
TASK-093, TASK-93, TASK-OR 88-101, GL-88-03, GL-88-3, IEB-85-001, IEB-85-1, NUDOCS 8805310029
Download: ML20154K413 (2)

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VlltOINI A l$LliCTitlO AND l'OWillt COMmNY HICitMOND, Vil10lNI A 2 0061 May 23, 1988 D.H.Curpsw Vice l'ussatuanT-NortsAm U. S. Nuclear Regulatory Commission Serial No.88-101 Attention: Document Control Desk N0/TAH Washington, D. C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 GENERIC LETTER 88 RESOLUTION OF GENERIC SAFETY ISSUE 93.

"STEAM BINDING OF AUXILIARY FEEDWATER PUMPS" Generic Letter 88-03 requested that licensees confirm that procedures identified in the response to IE Bulletin 85-01 are still being implemented.

These procedures are used to detect and take corrective actions for steam binding of Auxiliary Feedwater Pumps due to backleakage of check valves in the discharge piping between the Auxiliary Feedwater Pumps and the Steam Generators.

In response to IEB 85-01, North Anna Power Station 1) mcdified 1-LOG-6F (2-LOG-6F, Unit 2) to provide a surveillance of the discharge pipe temperature every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and 2) implemented 1-AP-22.9 (2-AP-22.9, Unit 2) to take required corrective actions for steam binding and to reestablish operability of the Auxiliary Fe 2dwater Pumps if discharge piping temperatures indicate backleakage. In adNtion, Periodic Test (PT) procedures, PT-71.1, PT-71.2 and PT-71.3, provide instruction for mcnitoring the Auxiliary Feedwater Pump discharge lines prior to each monthly flow test to detect conditions that could cause the AFW pumps to become steam bound.

Although there have been no instances of Auxiliary Feedwater Pump steam binding at North Anna, these procedures and surveillance requirements will remain in effect.

The information provided in this response is true and accurate to the best of '

my knowledge.

Very truly yours, h

D. S.

J W

I 8805310029 880";23 <i PDR ADOCK 05000338 P DCD

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1 cc: U. S. Nuclear Regulatory Comission 101 Marietta Street, N.W.

Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station t

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