ML20005B763
| ML20005B763 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 08/24/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Pilant J NEBRASKA PUBLIC POWER DISTRICT |
| References | |
| NUDOCS 8109020098 | |
| Download: ML20005B763 (3) | |
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Docket Nos. 50-298 AUG z 41981 Nr. J. H. Pilant, Director l J c o G 1981 *' :
Oe "w Win *%ds" on ic-Licensing & Quality ';surance
/C Nebraska Public Power District P. O. Box 499 3/'
Columbus, Nebraska 68601
,d 9
RE: COOPER HUCLEAR POWER 58. TION
Dear Mr. P11 ant:
By "A810022, Confirms Data Presented in GE to Nrc,In Response to IE Bulletin 79-26.Loss of Boron Based on 50% Local [[Atomic Element" contains a listed "[" character as part of the property label and has therefore been classified as invalid. Depletion Is Predictable & Is Not Affected by Plant Operating Parameters|letter dated July 2,1981]], we informed you that we were proposing to hold a meeting with you and other licensees who have requested approval to operate at power levels above 50% with only ::ne recirculation loop in service in the event the other loop is inoperative. The announced purpose of this meeting is to obtain a better understanding of what night have caused variations in jet pump flow and related paraneters at Browns Ferry Unit Ho,1 durinc single loop operation and how this incident affects approval of your application. He had proposed a range of dates for the meeting to accomodate the people expected to attend. Based on expressed preferences, the meeting on single loop operating experience will be neld at 9:00 A.M., k'ednesday, September 9,1981 in Roon P-118, Phillips Building, 7920 Norfolk Avenue, Bethesda, Maryland. The agends, a copy of which is enclosed, is the same as that included with our previous letter.
You are requested to advise your NRC project manager of the personnel who will be attending frorn your organization.
i Sincerely, 1
Original Signed by T. A. Ippolito Thomas A. Ippolito, Chief Operating Reactors Branch #2 Division of Licensing i
Enclosure:
Meeting Agenda i
cc w/ Enclosure See next page Distribution:
Docket File HSIC S M,d NRC PDR TERA Local PDR S. Norris ORB #2 Reading ACRS (10)
D. Eisenhut' J. Heltemes, AE0D OELD R. Clark OISE (3)
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8109020098 910924 PDR ADOCK 05000298 hacs P PDR OFFICIAL RECORD COPY usam nu-mmo
Proposed Meeting with BWR Applicants and Licensees o'n Single Loop Operation Purpose of Meeting:
1.
To determine what may have caused the jet pump flow and other variations experienced by Browns Ferry Unit I during single loop operation and 2
Evaluate whether the Browns Ferry experience should res0lt in power limits for other BWRs operating on a single loop.
Agenda:
1.
Discussion of what may have caused the unexpected variations in operating parameters when Browns Ferry Unit 1 exceeded about 60 percent rated power while operating with only one recirculation loop.
2.
Discussion of parameters affected at Browns Ferry 1 (i.e., jet pump flow, neutron flux, core flow, core pressuredrop,etc.)
3.
Discussion of whether the Browns Ferry 1 experience would be expected at other BWRs operating on one recirculation loop.
If so3_are safety limits likely.to be violated or cause complications with respect to core
~
stability, core flow symmetry, pump cavitation or damage to the jet pumps and reactor vessel internals.
4.
Discussion of the benefits. vs. potential problems and cost of testing single loop operation in another BWR i
that is instrumented to detect what parameters are a f fected.
5.
' Evaluation of whether single loop operation at po'wer levels about 50 to 55 percent is a safe and prudent means of reactor operation.
/
m
Mr. J..M. Pflant Nebra.ska Public Power District cc:
'Mr. G. D. Watson, General Counsel Nebraska Public Power District P. O. Box 499 Columbus, Nebraska. 68601 Mr. Arthur C. Gehr Attorney Snell & Wilmer 3100 Valley Center Phoenix, Arizona. 85073
. Cooper Nuclear Station ATTN: Mr. L. Lessor Station Superintendent' P.. O. Box 98 Brownville, Nebraska 68321
' Auburn Public Library 118 --15th Street Auburn, Nebraska 68305 Mr. Dennis Dubois USNRC Resident Inspector P.O. Box 218 Brownsville, NE 68321 Ron E. Engle, Manager Reload Fuel Licensing (MC 682)
General Electric Company San Jose, California 95125 8
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