ML20235H014
| ML20235H014 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 09/23/1987 |
| From: | Long W Office of Nuclear Reactor Regulation |
| To: | Trevors G NEBRASKA PUBLIC POWER DISTRICT |
| Shared Package | |
| ML20235H016 | List: |
| References | |
| TAC-59084, NUDOCS 8709300333 | |
| Download: ML20235H014 (3) | |
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UNITED STATES o
c, NUCLEAR REGULATORY COMMISSION
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,E WASHINGTON, D. C. 20555 '
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September 23, 1987 l
Docket No. 50-298 Mr. Goerge A'. Trevors, Division Manager - Nuclear Support Nebraska Public Power District P.O. Box 499 Columbus, Nebraska 68601
Dear Mr. Trevors:
SUBJECT:
SAFETY EVALUATION REPORT ON COOPER NUCLEAR STATION COMPLIANCE WITH ATWS RULE 10 CFR 50.62 RELATING TO ARI AND RPT SYSTEMS, AhD' REQUEST FOR ADDITIONAL INFORMATION REGARDING SLCS (TAC 0.5908Ql The ATWS Rule (10 CFR 50.62) requires improvements in the design'and operation of commercial nuclear power facilities to reduce the likelyhoed of failure to shutdown the reactor following anticipated transients and to mitigate the conse-quences of an Anticipated Transient Without Scram (A W S) event. The requirements i
for a boiling water reactor are to install an alternate rod insertion (ARI) liquid control system (SLCS), and improved ATWS system, improved standby (RPT) system.
recirculation pump trip In letters dated October 14, 1985, August 4, 1986, April 8, 1987, and May 7, 1987, the District provided information concerning plans to comply with the Rule.
We have completed our evaluation of the information relating to the ARI and
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RPT systems and have concluded that the proposed designs for those systems are acceptable.
Our Safety Evaluation is er. closed.
We,have not completed our evaluation of the SLCS modification.
Discussion with
-your staff indicate that the SLCS modification is still in the design stage, and that information necessary to verify adequate net positive suction head for SLCS pumps is presently unavailable.
We request that you furnish drawings and calcx1ations relating to your proposed SLCS modifications as soon as they are available and in time to meet your August 4,1986 commitment to implement the modifications in the upcoming Cycle 11 outage.
If you have any questions concerning the Safety Evaluation or Request for Additional Information please contact me at 301-492-4754.
l 8709300333 870923 PDR ADOCK 05000298.
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The reporting and/or recordkeeping requirements contained in this letter affect fewer thatn ten respondents; therefore, OMB clearance is not required under P.L.96-511.
Sincerely
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William 0. Long, Project Manager Project Directorate-IV Division of Reactor Projects - III, IV, V ar.d Special Projects
Enclosure:
As stated DISTRIBUTION Cocket File NRC PDR Local PDR PD4 Reading F. Schroeder P. Noonan Project Manager 0GC-Bethesda E. Jordan J. Partlow ACRS (10)
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i Mr. George A. Trevors Nebraska Public Power District Cooper Nuclear Station 1
CC:
- Mr. G.- D. Watson, General Counsel Nebraska Public Power District' P. O. Box 499 Columbus, Nebraska 68601 Cooper Nuclear Station ATTN:
Mr. Guy R. Horn, Division Manager of Nuch ;r Operations
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P. O. Box 98 Brownville, Nebraska 68321 Director Nebraska Department of Environmental Control P. O. Box 94877 State House Station Lincoln, Nebraska 68509-4877 I
Mr. William Siebert, Commissioner Nemaha County Board of Commissioners Nemaha County Courthouse Auburn, Nebraska 68305 Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 218 Brownville, Nebraska 68321 i
Regional Administrator, Region IV U.S. Nuclear Regulatory Commission
'1 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Mr. Harold Borchart, Director Division of Radiological Health Department of Health-301 Centennial Mall, South P. O. Box 95007 j
i Lincoln, Nebraska 68509 i
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