ML20010D810
| ML20010D810 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 08/24/1981 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Rich Smith VERMONT YANKEE NUCLEAR POWER CORP. |
| References | |
| NUDOCS 8108310564 | |
| Download: ML20010D810 (4) | |
Text
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Das h Docket No. 50-271 gg 3 4 g Mr. Robert L. Smith N
(b x Licensing Engineer
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k((f" Hf5 Vermont Yankee !!uclear Power
\\1 Corporation 3
1671 Norcester Road Ta Franingham, Massachusetts 01701
(, AUG 2 61981 na. J c u-u.s. amu nouumn /,
RE: VERM0?iT YANKEE NUCLEAR POWER STATION
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Daar Mr. Smith:
- W l tg On July 2,1981, we sent a letter to all licensees who have requested approval to operate on a continuing basis at power levels abov: 50% with only one recirculation loop in the event the other loop is inoperative. You and other BUP, licensees received a copy of one of these letters since we expect nost BWR facilities would like to have this flexibilf t,y.
In the letter w? proposed a meeting to obtain a better understanding of what night have caused variations in jet pump ficw and related paraneters at Browns Ferry Unit No.1 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 nianager that you are interested in attending the proposed neeting. The neeting will be held at 9:00 A.M.,
Wednesday, September 9,1981 in roon P-118, Phillips Building, 7920 Horfolk Avenue, Bethesda, Maryland. You are requested to advise your project manager of the people who will be attending this recting from your organization.
Sincerely.
Original Signed by T. A. Ippolito Thomas A. Ippolito, Chief Operating Reactors Branch #2 Division of Licensing
Enclosure:
!!eeting Agenda cc w/ enclosure See next page Distribution:
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Proposed Meeting with BWR Applicants and Licensees on Single Leop ' Operation Purpose of M3eting:
1.
To determine what may have caused the jet pump flow and other variations experienced by Browns Ferry Unit 1 during single loop operation and 2.
Evaluate whether the Browns Ferry experience should result 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 pressure drop, etc.)
3.
Discussion of whether the Browns Ferry 1 experience would be expected at other BWRs operating on one recirculation loop.
If sure 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.
Discussien of the benefits vs. potential problems and cost of testing single loop cperation in another SWR that is instrumented to detect what parameters are a f fected.
5.
'E.aluation of whether single loop operation at power levels about 50.o 55 percent is a safe and pruden:
means of reacter operation. '
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e Mr. Robert L. Smith cc:
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'Mr. W. F. Conway John R. Stanton, Director 7 resident..& Chief Operating Officer Radiation Control Agency Vermont Yankee Nuclear Power Corp.
Hazen Drive 411 Western Avenue Concord, New Hampshire 03301 Drawer 2 West Brattleboro, Vermont 05301 John W. Stevens Conservation Society of
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Southern Vennent Mr. Louis H. Heider, V.P.
P. O. Box 256 Vement Yankee Nuclear Power Townshend, Yement _05353 Coroo-ation p.
Raynond N. McCandles's 25 Research Drive Radiation Control Pro ram 0ccupational & Radiolhgical H1th Westboro, Massachusetts 01581 Administration Building Ahn A. Ritscher, Escuire Montpelier, Vernent 05602 Ropes & Gray 226 Franklin Street New England Coalition on Nuclear Boston, Massachusetts 02110 Pollution Hill and Dale Fam Laurie Burt West Hill - Faraway Road Assistant Attorney General Putney, Vermont 05346 Environmental Protection Division Attorney General's Office.
Public. Service Board One Ashburton Place,19th Floor State of Yement Ecston, Massachusetts 02108 120 State Street Montpelice, Yemont 05502 Ronald J. Wilson 81018th' Street, N. W.
W. P. Murohy, Plant Superintendent
- Suite 802 Vemont Yankee Nuclear Power Washington, D. '.
20006 Corporation P. O. Box 157 Honorable M. Jerome Diamond Vernon, Yement 05354.
Attorney General State of Vemont David White 109 State Street Co-Director Pav' lion Office Building Vemont Public Interest Montpelier, Yement 05502
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Reserach Group, Inc.
43 State Street Vermont Yankee Decomissioning Montpelier, Yement 05602 Alliance 127 Main Street Vement Yankee Deconrnissioning Brattleboro, Vermont 05301 Alliance 5 State Street Mr. E. W. Jackson Box 1117 j
Manager of Operations Montpelier, Yemont 05502 Vermont Yankee Nuclear Power Corp.
411 Western Avenue Brooks Memorial Library Drawer 2 224 Main Street West Brattleboro, Vermont 05301 Brattleboro, Vemont 05301 es e.
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Mr.- Robert L. Smith cc:
Resident Inspector c/o U. S. NRC P. O. Box 176 Vernon, Yemont 05453 e
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