ML17284A741
| ML17284A741 | |
| Person / Time | |
|---|---|
| Site: | Columbia, Seabrook  |
| Issue date: | 09/04/1998 |
| From: | Hoyle J NRC OFFICE OF THE SECRETARY (SECY) |
| To: | Sununu J HOUSE OF REP. |
| References | |
| CON-#398-19492 LA, NUDOCS 9809080049 | |
| Download: ML17284A741 (6) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205554001 August 31, 1998 Mr. J. V. Parrish Chief Executive Officer Washington Public Power Supply System P.O. Box 968 (Mail Drop 1023)
Richland, Washington 99352-0968
SUBJECT:
COMPLETION OF LICENSING ACTION FOR GENERIC LETTER 97-04, "ASSURANCE OF SUFFICIENT NET POSITIVE SUCTION HEAD FOR EMERGENCY CORE COOLING AND CONTAINMENTHEAT REMOVAL PUMPS," DATED OCTOBER 7, 1997 - WNP-2 (TAC NO. MA0063)
Dear Mr. Parrish:
On October 7, 1997, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 97-04, "Assurance of Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal Pumps," to all holders of operating licenses or construction permits.
The NRC issued GL 97-04 to confirm the adequacy of the net positive suction head (NPSH) available for emergency core cooling (including core spray and decay heat removal) and containment heat removal pumps under ail design-basis accident scenarios.
In GL 97-04, the NRC staff specifically requested that licensees provide the information outlined below for each of their facilities:
Specify the general methodology used to calculate the head loss associated with the ECCS suction strainers.
2.
Identify the required NPSH and the available NPSH.
3.
Specify whether the current design-basis NPSH analysis differs from the most recent analysis reviewed and approved by the NRC for which a safety evalution was issued.
Specify whether containment overpressure (i.e., containment pressure above the vapor pressure of the sump or suppression pool fluid)was credited in the calculation of available NPSH. Specify the amount of overpressure needed and the minimum overpressure available.
5.
When containment overpressure is credited in the calculation of available NPSH, confirm that an appropriate containment pressure analysis was done to establish the minimum containment pressure.
Mr. J. V. Parrish August 31, 1998 In response to GL 97-04, you provided letters dated November 4, 1997, and January 5, 1998, for WNP-2. These submittals provided the information requested by GL 97-04. The staff has reviewed your response and has concluded that all requested information has been provided; therefore we consider GL 97-04 closed for your facility. We thank you for your prompt and complete response.
Ifyou have any questions regarding this matter, please contact me at (301) 415-1341.
Sincerely, Original Signed By Docket No. 50-397 cc: See next page DOCUMENT NAME: GL9704.ltr Chester Poslusny, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket File PUBLIC PDIV-2 Reading File EAdensam WBate man CPoslusny EPeyton HWong OGC ACRS JKudrick KKavanagh DSkay OF.C PDIV-2/P P DIV-2/LA N
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NAME DATE 8/ "/98 Gaff /98 CPosl s y EPeey
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Mr. J. V. Parrish August 31, 1998 ccl:
Mr. Greg O. Smith (Mail Drop 927M)
WNP-2 Plant General Manager Washington Public Power Supply System P. O. Box 968 Richland, Washington 99352-0968 Mr. Albert E. Mouncer (Mail Drop 1396)
Chief Counsel Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352-0968 Ms. Deborah J. Ross, Chairman Energy Facility Site Evaluation Council P. O. Box 43172 Olympia, Washington 98504-3172 Mr. D. W. Coleman (Mail Drop PE20)
Regulatory Affairs Manager Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352-0968 Mr. Paul Inserra (Mail Drop PE20)
Manager, Licensing Washington Public Power Supply System P.O. Box 968 Richland, Washington 99352 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission Harris Tower 8 Pavilion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Chairman Benton County Board of Commissioners P.O. Box 69 Prosser, Washington 99350-0190 Mr. Scott Boynton, Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 69 Richland, Washington 99352-0968 Mr. Rodney L. Webring (Mail Drop PE08)
Vice President, Operations Support/PIO Washington Public Power Supply System P. O. Box 968 Richland, Washington 99352 Perry D. Robinson, Esq.
Winston & Strawn 1400 L Street, N.W.
Washington, DC 20005-3502
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