ML20198D727
| ML20198D727 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 12/17/1998 |
| From: | Wigginton D NRC (Affiliation Not Assigned) |
| To: | Horn G NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| IEB-96-003, IEB-96-3, TAC-M96141, NUDOCS 9812230190 | |
| Download: ML20198D727 (4) | |
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December 17, 1998 Mr. G. R. Horn Sr. Vice President of Energy Supply Nebraska Public Power District 141415th Street Columbus, NE 68601
SUBJECT:
COMPLETION OF LICENSING ACTION FOR 96-03," POTENTIAL PLUGGING OF EMERGENCY CORE COOLING SUCTION STRAINERS BY DEBRIS IN BOILING-WATER REACTORS," DATED MAY 6,1996; COOPER NUCLEAR STATION (TAC NO. M96141)
Dear Mr. Horn:
On May 6,1996, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin (BL) 96-03,
" Potential Plugging of Emergency Core Cooling Suction Strainers by Debris in Boiling-Water Reactors" to all holders of operating licenses or construction permits for boiling-water reactors.
The NRC issued BL 96-03 to ensure that the emergency core cooling systems (ECCS) in BWRs can perform theirintended safety function to mitigate the effects of a postulated loss-of-coolant accident. The BL provided three options for resolving this issue including (1) installation of large capacity passive strainers, (2) installation of self-cleaning strainers, or (3) installation of a back flush system.
In BL 96-03, the NRC staff specifically requested that licensees submit the following reports for each of their facilities:
1.
A description of planned actions and mitigative strategies to used, the schedule for implementation, and proposed technical specification, if appropriate.
2.
A report confirming completion and summarizing actions taken.
In response to BL 96-03, you provided a letter dated May 16,1997, for the Cooper Nuclear Station (CNS). You stated that you had installed large capacity passive strainers and would resolve any outstanding issues that might be identified with the completion of the Boiling Water Reactors Owners Group Utility Resolution Guidance (URG) document. The staff reviewed the URG and issued a safety evaluation on August 20,1998. In addition, the NRC staff conducted an audit of the CNS strainers on July 9,1997, and in a trip report dated September 9,1997, concluded that CNS should readdress the evaluation cor: ducted pursuant to 10 CFR 50.59.
The staff has reviewed your response and has determined that the actions taken, including the need to readdress the 50.59 evaluation, should minimize the potential for clogging of ECCS suction strainers and ensure the capability of the ECCS to provide long-term cooling folicwing a i
loss-of-coolant-accident as required by 10 CFR 50.46. The staff considers your actions g
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4 Mr. G. R. Horn 2-responsive to the concerns raised in BL 96-03. Therefore, BL 96-03 is closed for yo Deteiled reviews of your strainer design and 10 CFR 50.59 evaluation may be perform plant specific basis in the future.
If you have any questions regarding this matter, please contact David Wigginton a 1301.
Sincerely, David L.
ginton, Senior Project Manager L
Project Directorate IV-1 Division of Reactor Projects ill/IV Office of Nuclear Reactor Regulation Docket No. 50-298 4
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Mr. G. R. Horn responsive to the concerns raised in BL 96-03. Therefore, BL 96-03 is closed for your facility.
Detailed reviews of your strainer design and 10 CFR 50.59 evaluation may be performed on a i
plant specific basis in the future.
If you have any questions regarding this matter, please ccatact David Wigginton at (301) 415-1301.
Sincerely, OP' UNAL SIGNED BY:
David L. Wigginton, Senior Project Manager Project Directorate IV-1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation Docket No. 50-298 cc: See next page DISTRIBUTION:
(bocket File PUBLIC PD4-1 r/f C. Berlinger C.Hawes ACRS OGC (15B18)
T. Gwynn, RIV D. Wigginton E. Adensam (EGA1)
J.Hannon R. Elliot D. Skay Document Name: CO96141.LTR
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l Mr. G. R. Horn Nebraska Public Power District Cooper Nuclear Station cc:
Mr. John R McPhail, General Counsel Lincoln Electric System Nebraska Public Power District ATTN: Mr. Ron Stoddard P. O. Box 499 1040 O Street Columbus, NE 68602-0499 Box 80869 Lincoln, NE 68501 Nebraska Public Power District ATTN: Mr. J. H. Swailes MidAmerican Energy Vice President of Nuclear Energy ATTN: Dr. William D. Leech, Manager-Nuclear P. O. Box 98 907 Walnut Street Brownville, NE 68321 -
P. O. Box 657 Des Moines, IA 50303-0657 Randolph Wood, Director Nebraska Department of Environmental Nebraska Public Power District Control ATTN: Mr. B. L. Houston, Nuclear P. O. Box 98922 Licensing & Safety Manager Lincoln, NE 68509-8922 P. O. Box 98 Brownville, NE 68321 Mr. Larry Bohlken, Chairman Nemaha County Board of Commissioners Nemaha County Courthouse 1824 N Street Auburn, NE 68305 Senior Resident inspector U.S. Nuclear Regulatory Commission P. O. Box 218 Brownville, NE 68321 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington,TX 76011 Ms. Cheryl Rogers, LLRW Program Manager Division of Radiological Health Nebraska Department of Health 301 Centennial Mall, South P. O. Box 95007 Lincoln, NE 68509-5007 Mr. Ronald A. Kucera, Department Director of intergovernmental Cooperation Department of Natural Resources P.O. Box 176 Jefferson City, MO 65102
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