ML20010D774
| ML20010D774 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 08/24/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Jackie Jones CAROLINA POWER & LIGHT CO. |
| References | |
| NUDOCS 8108310281 | |
| Download: ML20010D774 (3) | |
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Docket Hos. 50-325 AUG 2 41981 and 50-324 g
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AUC 2 G 1981>
Mr. J. A. Jones (pp.s.6anoscon 6
Senior Executive Vice President Carolina Power a Light Cor"peny x
336 Fayetteville Street x'.
d Raleigh, North Carolina 27602
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RE: BRUNSUICK STEN 1 ELECTRIC PLANT Ulf!TS 1 AND 2 l
Dear Mr. Jones:
On July 2,1981, we sent a letter to all ifcensees who have requested approval to oeerate on a continuing basis at power levels above 501 with only one recirculation loop in the event the other loop is inoperative. You and other Sk'R licensees received a copy of one of these letters since we expect most BWR facilities would like to have this flexibility.
In the letter we proposed a necting to obtain a better understanding of what might have caused variations 4
in jet pu p ficw and related parareters at Browns Ferry Unit No. I during single loop operation and how this incident should affect approval of single loop operation at other facilities.
You have indicated to your NRC project manager that you are interested in attending the proposed meeting. The meeting will be held at 9:00 A.M.,
Wednesday, September 9,1981 in room P-118, Phillips Building, 7920 Norfolk t
Avenue. Dethesda, Maryland. You are requested to advise your project managt r of the people who will be attending this neeting from your organization.
Sincerely, (Mainel Sted by T. A. Ippolito Thomas A. Ippolito, Chief Operating Reactors Branch #2 Division of Licensing
Enclosure:
Meeting Agenda cc w/ enclosure See next page Distribution:
Docket File NSIC 3 A O LJ NRC PDR TERA Local PDR S. Norris ORB #2 Reading ACRS (10)
D. Eisenhut J. Heltemes, AE00 OELD R. Clark GlaC (3' OFFICE )...QRMM.
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t proposed Meeting with BWR Applicants and Licensees on Single Loop Operatien
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purpose of lieeting:
1.
To determine What may have caused the jet pump flow and other variations experienced by Browns Ferry Unit 1 l
curing singic loop operation and l
2.
Evaluate whether the Browns Ferry experience should result in power' limits for other BWRs operating on a single loop.
I 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 i
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.)
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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 j
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. poter,t'al problems and cost of testing single loop operation in another BWR that is instrumented to detect what parameters are i
affected.
j 5.
' Evaluation of whether single loop operation at po'wer i
levels about 50 to 55 percent is a safe and prudent means of reactor cperation.
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Mr. J. A. Jones cc:
T.ichard E. Jones, Esquire Carolina Power & Light Company 336 Fayetteville Street Raleigh, North Carolina 27602 George F. Trowbridge, Esquire Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 John J. Burney, Jr., Esquire Burney, Burney, Sperry & Barefoot 110 North Fifth Avenue Wilmington, North Carolina 28401 Resident Inspector U. S. Nuclear Regulatory Commission s
P. O. Box 1057 Southport, North Carolina 28461 1
Southport - Brunswick County Library 109 W. Moore Street Southport, North Carolina 28461 Mr. Charles R..Dietz Plant Manager P. O. Box 458 Southport, North Carolina 28461 i
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