LR-N970746, Informs That Util Is Revising Commitment to Determine Total Sludge Loading from Current Refueling Outage to Next Refueling Outage,Currently Scheduled to Begin in mid-Feb 1999,re Ieb 96-003, Potential Plugging of ECC Suction..

Informs That Util Is Revising Commitment to Determine Total Sludge Loading from Current Refueling Outage to Next Refueling Outage,Currently Scheduled to Begin in mid-Feb 1999,re Ieb 96-003, Potential Plugging of ECC Suction..

ML20199J033
Person / Time
Site:	Hope Creek
Issue date:	11/18/1997
From:	Eric Simpson Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-96-003, IEB-96-3, LR-N970746, NUDOCS 9711280034
Download: ML20199J033 (3)

Text

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d et c $as company E. C. Simpson P.o. Box 236. Hancocks Bridge f4J 00038 609-339-1700 s c. m. - . ,m.aye ,m Putdc Service Doctnc and Gas Co3anyN V 181997 LR-N970746 United States Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 REVISION TO COMMITMENT NRC BULLETIN 96-03, POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION STRAINERS BY DEBRIS !N BOILING WATER REACTORS HOPE CREEK GENERATING STATION FACILITY OPERATING LICENSE NPF 57 DOCKET NO. 50-354 Gentlemen:

By lotter dated July 18,1997 Public Service Electric & Gas Company (PSE&G) committed to sample the torus sludge during the current refueling outage. The purpose of the samples was to obtain a better value for sludge density and to determine total sludge loading in the torus. This information was to be used to determine the sludge accumulation rate per cycle for Hope Creek and to provide for accurate torus inspection acceptance criteria. As part of the torus inspections conducted during each refueling outage, the acceptance criteria are used to decide whether torus cleaning is required.

The acceptance criteria serve to ensure the total sludge loading could not threaten c ECCS suction strainer performance during the subsequent operating cycle.

The camples taken while the torus was being cleaned during the current outage were not of sufficient size to provide accurate estimates of sludge density or total act.,umulation. As a result, PSE&G is revising its commitment to determine total sludge loading from the current refueling outage to the next refueling outage, currently scheduled to begin in mid-February 1999. This schedule for completing the determination of plant specific sludga generation rate is consistent with the guidance contained in the Boiling Water Reactor Owners' Group Utility Resolution Guidance (URG) for ECCS Suction Strainer Blockage.

This delay in determining actual sludge loading will have no adverse effect on the O safety of plant operation since the Hope Creek torus was thoroughly desludged during the current refueling outage. In addition, no fibers were found in the samples of torus sludge taken during the current outage.

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- Based upon the plant specific sludge generation rate determined in the next refueling outage, torus cleaning will be performed at a frequency to ensure the assumed sludge loading for the replacement ECCS suction strainers is not exceeded.

Should you have any questions regarding this transmittal, we will be pleased to discuss them with you.

Sincerely, y .

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96-4433

t NOV 181997 Qocument Control Desk g' LR-N970746-C Mr. H. Miller, Administrato'- Region i U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. D. Jaffe, Licensing Project Manager - HC U. S. Nuclear Regulatory Commission One Wnite Flint North 11555 Rockville Pike Mall Stop 14E21 Rockville, MD 20852 Mr. S. Morris (X24)

USNRC Senior Resident inspector - HC Mr. K. Tosch, Manager IV Bureau of Nuclear Engineering PO Box 415 Tronton, NJ 08625 L

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