ML20045C332

Discusses 920526 SE Accepting Alternate Method for Isolating Main Steam Drain Line During SBO

ML20045C332
Person / Time
Site:	Hope Creek
Issue date:	06/18/1993
From:	Stephen Dembek Office of Nuclear Reactor Regulation
To:	Miltenberger S Public Service Enterprise Group
References
TAC-M86641, NUDOCS 9306220373
Download: ML20045C332 (4)

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W ASHINGTON 0.C. 20555-0001 June 18, 1993 Docket No. 50-354 Mr. Steven E. Miltenberger Vice President and Chief Nuclear Officer Public Service Electric and Gas Company Post Office Box 236 Hancocks Bridge, New Jersey 08038

SUBJECT:

SAFETY EVALUATION OF ALTERNATE METHOD FOR ISOLATING MAIN STEAM DRAIN LINE DURING STATION BLACK 0UT (SBO), HOPE CREEK GENERATING STATION (TAC N0. M86641)

The NRC staff's (the staff) Supplemental Safety Evaluation (SSE) of your response to the SB0 Rule, 10 CFR 50.63, was transmitted to you by letter dated May 26, 1992.

In our letter we found your proposed method of coping with an SB0 to be acceptable, with the exception of two concerns documented in our letter. Although you were not requested to provide further submittals regarding the staff's concerns, you responded to one of the concerns in a letter dated April 28, 1993.

In your letter you indicated that you re-evaluated the habitability of the main steam tunnel and determined that following an SB0 event, the temperature within the main steam tunnel will increase to a marginal level for prolonged human habitability.

Based on this re-evaluation, you decided that it would be more prudent to provide an alternate method for isolating the main steam drain line during an SB0 event.

The staff has completed its review of your alternate method for isolating the main steam drain line delineated in your April 28, 1993 letter. Your letter stated that valves 1AB-HV-F020,1AB-HV-F021 and either_ V018 or V019 would be maintained in a closed position during plant operations above 15% power.

Regulatory Guide 1.155, Section 3.2.7, Number 1, recommends that valves that are normally " locked closed" can be excluded from SB0 consideration.

Mr. David A. Smith and Mr. George S. Daves, Jr., from your staff, stated in a June 7,1993 telephone conversation that it was decided not to lock the motor-operated valves 1AB-HV-F020 and 1AB-HV-F021 in the closed position by removing the power supply to the motor operators because certain emergency operating procedures require the above mentioned valves to be operated. Mr. Smith and Mr. Daves further stated that installing a locking device at the motor control center would not be a cost-effective method for preventing the inadvertent operation of the valves at power.

Instead of locking devices, you will use administrative procedures (i.e., red tagging) to ensure that the valves remain closed during normal plant operations.

I Based on the staff's review, we have determined that your alternate method is consistent with the intent of Regulatory Guide 1.155 and is therefore

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You are reminded that all documentation in support of SB0 submittals should be maintained in your files for possible future NRC audit.

This completes our activities on TAC No. M86641.

Sincerely, Original signed by Stephen Dembek, Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

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Steven E. Miltenberger June 18. 1993 acceptable.

You are reminded that all documentation in support of SB0 submittals should be maintained in your files for possible future NRC audit.

This completes our activities on TAC No. M86641.

Sincerely, v

Stephen Dembek, Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

See next page 1

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I Mr. Steven E. Miltenberger Hope Creek Generating Station Public Service Electric & Gas Company cc:

M. J. Wetterhahn, Esquire Mr. J. A. Isabella Winston & Strawn MGR. - Generation Department 1400 L Street, N.W.

Atlantic Electric Company Washington, DC 20005-3502 Post Office Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 R. Fryling, Jr., Esquire Law Department - Tower SE Richard Hartung 80 Park Place Electric Service Evaluation Newark, New Jersey 07101 Board of Regulatory Commissioners 2 Gateway Center, Tenth Floor Hope Creek Resident Inspector Newark, NJ 07102 U.S. Nuclear Regulatory Commission Drawer I Lower Alloways Creek Township Hancocks Bridge, New Jersey 08038 c/o Mary 0. Henderson, Clerk Municipal Building, P.O. Box 157 Mr. J. Hagan Hancocks Bridge, NJ 08038 Vice President - Nuclear Operations Nuclear Department P.O. Box 236 Hancocks Bridge, New Jersey 08038 Mr. R. Hovey General Manager - Hope Creek Operations Hope Creek Generating Station P.O. Box 236 Hancocks Bridge, New Jersey 08038 Mr. Frank X. Thomson, Jr., Manager Licensing and Regulation Nuclear Department P.O. Box 236 Hancocks Bridge, New Jersey 08038 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Aliendale Road King of Prussia, Pennsylvania 19406 Dr. Jill Lipoti, Asst. Director Radiation Protection Programs i

NJ Department of Environmental Protection and Energy CN 415 Trenton, New Jersey 08625-0415 0