ML20009A773
| ML20009A773 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 07/02/1981 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Bauer E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 8107140183 | |
| Download: ML20009A773 (5) | |
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Ilocket ao, 50-?/7 JUL 2 19 81 Q)tbog4 and t.u-276 p'l F I 4
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vice P resi tent, sen.-ral counsel thil6delpnia tit.ctric Lo.panj N
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ny letter oo ted January
), l'4,1 jou suo0 L tc J do dallcal10n to per,'1t i eacn Lottw / and J to he L;;+rn ted uj th a sinjle r eci rcal a tion loop 1 ri service ra ther tnan both loops.
..e issa.d 11 cense anon (Nents on
,uj lb, l on1 autt.orizio; renc:. outto. : nit us. / and J to he operoted at 90,.ercent poi,er.a th only rue loop in semice, lurte other tdL111 tits nave requesteo si.nilar outnor14ation and we expect e ther t c.s..ill request aptroval for single loop o tration in tite riear future.
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- ns have previously oeen authorizee to ej.erate for a shnrt perial ut tire wi to one rec i rcula tion loop.
In oli out one case, pr.ve r level r,as t een been 11..i ted to N pe rcen t; tne one exception aos orowns ferry uni t ou.
1.
'. n :a r tei:ner 29, li/3, based on ornilyses peri or.iec ter B A by the ' eneral t lectrit Lo.tany (l.L ), e authorizea In to operate runns i err) I f er uscut two mnths at pm.er leve.s up to percent of tull raten l
aower.
nurine po.4er osconsion.ith. roans ierry 1 in sin jle loop opera tion, J e t pu...p flow variations were noted in toe attive loop above a pur.p spe(d at.. percent 01 rated flow (@out a percent of ratM power). ohenever I V /, trie6 to increose toe potter level ehove (nis point, trej noted varia tions i n a c t pu:,p tiow, neu tron flux, an,' rel a ted para seters. Acc ordi n g ly, 16 e inistrat1vely lii i ted arewns t erry t,ni t 1 opera tioe to it ss then th porcent for tre atprox1uately two too ths toe uni t operateu on a s'ngle loop.
..h11e analyses indicate that it shoulo be saie tu op e ra te o....s on single a
loop in the ranle oi % Lercent of ra r er. power, tha ex erlence at irov.ns r
f erry Uni t i r,as raisea concerns atsuut 0 7 th u r1.: i n s si nt.l e loop operation for
' o percent ra teo po <er until chere is o oetter unnerstanding of mh s abov :
wnat wy nave causeo the variotions in this tec111tj.
l 8107140183 810702 PDR ADOCK 05000277 P
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V Mr. Edward G. Bauer, J r.
2 To try to develop a better understanding of what occurred at Browns Ferry 1 in the fall of 1979, we are proposing a meeting with you and the other licensees who have requested approval for single loop operations. We also propose to invite other 8,lR applicants and licensees since Vicy may desire to have approval for single loop operation of their facilities in the future.
The questions we wish to address in the proposed meeting are discussed in the enclosure to this letter. Since GE has provided the analysis to you to support your application, it appears highly desirable that representatives of GE be present in trying to determine what occu. red at Browns Ferry Unit I and the implications, if any, to other UWs.
To accor.nouate the appropriate personnel froni your organization and otlier licensees, we have proposed a range of dates for the above r.weting, specif-ically, the weeks of either July 27, 1981, August 10, 1981 August 17, 1981, August 24, 1981, or Septer.4er 8,1981.
If you will advise your project manager of the date or dates ir.ost convenient to you, we will try to find a day tha'c is most suitable to all parties and so advise yoa.
Sincerely years, ORIGINAL SIGNED BY Jonn F. Stolz, Chief Operating Reactors branch #4 Division of Licensing
Enclosure:
Proposed llecting A9enda cc w/ enclosure - See next page Distribution:
Docket File (2)
NRC PDR Local PDR ORB #2 Reading D. Einsehut 0 ELD IE (3)
J. Stolz M. Fairtile P. Kruetzer NSIC TERA ACRS (10)
J. Heltemes. AE00 Gray File (2)-
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OFFICIAL RECORD COPY
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P,hiiadelphiaElectricCompany ecw/ enclosure (s):
Eugene J. Bradley.'
U. S. Environmental Protection Agency Philadelphia Electric Company Region III Office Assistant General Counsel ATTN:
EIS COORDINATOR 2301 Market Street Curtis Building (Sixth Floor)
Philadelphia, Pennsylvania 19101 6th and Walnut Streets Philadelphia, Pennsylvania 19106 Troy B. Conner, Jr.
1747 Pennsylvania Avenue, N.W.
M. J. Cooney, Superintendent Washington, D. C.
20006 Generation Division - Nuclear Philadelphia Electric Company Raymond L. Hovis, Esq.
2301 Market Street 35 South Duke Street Philadelphia, Pennsylvania 19101 York, Pennsylvania 17401 Government Publications Section Warren K. Rich, Esq.
State Library of Pennsylvania Assistant Attorney General.
Education Building Department of Natural Resources Com$onwealth and Walnut Streets Annapolis, Maryland 21401 Harrisburg, Pennsylvania 17126
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Philadelphia Electric Company ATTN: Mr. W. T. Ullrich Peach Bottom Atomic Power Station Mr. R. A. Heiss, Coordinator Delta, Pennsylvania 17314 Pennsylvania State Clearinghouse Governor's Office of State Planning Albert R. Steel, Chairman and Development Board of Supervisors P. O. Box 1323 Peach Bottom Township Harrisburg, Pennsylvania.17120 R. D. #1 Delta, Pennsylvania.17314 Mr. J. S. Abel Director of Nuclear 1,icensing Curt Cowgill Commonwealth Edison Company U.S. Nuclear Reguls tory Commission P.O. Box 767 Office of Inspection and Enforcement Chicago, Illinois 60690 Peach Bottom Atomic Power Station P.'0. Box 399 Mr. Georae T. Cerry Delte, Pennsylvania,17314 President & Chief Operating Officer Power Authority of the State Ron E. engel, Manager of New York Reload Fuel Licensing (MC 682) 10 Columbus Circle General Electric Company New York', New York 10019 -
San Jose, California 95125 Mr. L. O. Mayer, Manager Mr. Hugh G. Parris Nuclear Support Services Manager of Power Northern States Power Company Tennessee Valley Authority 414 Nicollet Mall - 8th Floor 500 A Chestnut Street, Tower II Minneapolis, Minnesota 55401 Chattanooga, Tennessee 37401 Mr. Robert L. Smith Mr. J. A. Jones Licensing Engineer Senior Executive V' ice President Vermont Yankee Nuclear Power Corp.
Carolina Power & Light Company 1671 Worcester Road 336 Fayetteville Street Framingham, Massachusetts 01701 Raleigh, North Carolina 27602
2 Phivedelphia Electric Company cc w/ enclosures:
Mr. W. G. Counsil. Vice President Nuclear Engineering and Operations Northeast Nuclear Energy Company P.O. Box 270~
Hartford, Connecticut 06101 Mr. J. T. Becham, Jr. (16/333)
Vice President - Engineering
. Georgia Power Company P.O. P.'x ' 4545 Atlanta. Georgia 30302 s.
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1 Proposed Meeting with BWR ' Applicants and Li cens ees ' on "S ingl e loop,0pera tion.
Purpose of lieeting:
1.
To determine shat may have caused the jet' pump
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flow variations and other variations experienced i
by Browns Ferry Unit 1 during single loop operation 'and 2.
Evaluate whether the Browns Ferry experience should result in power limits for other BWP,s operating on a single loop.
Agenda:
1.
Discuseion of what may have caused the unexpected variations in operating paramtters 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 ne"'.ron flux, core flow, core pressure drop, etc.)
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3.
Discussion of whether the Browns Fer'ry 1 experience would be expected at other BWRs operating on une recirculation loop.
If so, are safety limits likely to.
be violated or cause complications with respect to core-
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stability, core flow symmetry, pump cavitation or damage to the jet pumps and reactor vessel internals.
4.
Discussion of the benefits vs. poter.tial problems and cost of testing single loop operation in another BWR.
that is instrumented to detect what parameters are affected.
5,
. Evaluation of whether single loep operation'at power levels above 50 to 55 percent is a safe and prudent means of reactor operation.
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