ML20206K427
| ML20206K427 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 11/18/1988 |
| From: | Heitner K Office of Nuclear Reactor Regulation |
| To: | Robert Williams PUBLIC SERVICE CO. OF COLORADO |
| References | |
| GL-85-06, GL-85-6, TAC-54907, TAC-59097, NUDOCS 8811290400 | |
| Download: ML20206K427 (5) | |
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- A UNITED STATES 7-NUCLEAR REGULATORY COMMISSION
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Never.ber 18, 1988 Declet No.: 60-267 Mr. R. O. Williers, Jr.
Senior Vice President, nuclear Operations Futlic Service Corpeny of Colorado Fost Office Ecx 840 Cer.str, Celorac 60201-Of4C
Dear l'r. K1111ers:
SUEJECT: GEf tFIC LETTEF E!-06 C0!'pLI Al:CE WITH 10 CFF 50.02 (ATW5 FULE)
- FCpT ST. U.Alf. (TAC h0. 54907)
The st6ff bcs ccepleted a partial r(view cf your response dated Octcber 15, 1985 to Ger.eric Letter 85-06. As part of that review, the staff tas reviewed applicable portions of the Fort St. Vraic updateo F5;E.
T.'.e purpose cf this letter is to request ctriain additictil ir41 err.ation abwt fort St.
Vrair. regarding the citigatich of possible ATWS everts.
The ATLS Fule (10 CFF 50.62, 'Requirecents for Feducticr. of Risk fron Ar.ticipated Transients Wittcut Scrari ( ATWS) Events for Light-Water-Ccoled Nuclear Power Plants") requires ioprevener.ts in the design and cperation of lightwater corrercial ruclear power facilities to reduce the lilelibced of fcilure to shut dewr the reactor following anticipated trarsients and to ritigate the consequences cf er. ATWS evert.
By letter datcd October 15, 1965, you responded that although Fort St. Vrain is a high tteperature ges-cooled reactor and that the ATW5 Fule as currently written applies or'ly to light-water-cooled reectors, tte Fcrt St. Vrain design presently provides a reserve shutdcwn systet: (F55) which is considered ar alterrate to tte control red drive syster (prirary shutdown syster). During a conference call to July 4,1988, your staff solur.tarily agreed to address the ATW5 Eule further including the applicatility (upon receipt of a forr.al request) of the specific ATUS Fule design requirerents to tht: RSS.
TheATW5RulewaspublistedinaFedera_1Registernotification(Vol.49,No.1?43 dated June 26, 19F4 In the section entiiTed, "Considerations Regarding System er d Equirrer t Crittria,* e table is it.cluded which presidts design guider.ce or, what would ccrstitute acceptable ccepliance to the ATUS Fule requirerents.
The table is labeleJ, "Guidance Pegarding Systen and Equiprent Specifications."
It is our orderstandirg that you have a copy of the subject Federal Register retification. The enclosure to this letter provides a request for aTditional inferration essocietad with the ccr. sideration giver, to all possible ATWS events which cculd occur at Fort St. Vrair ard sonual initiatier, requirerents fer ectisating the FSS.
Ycu sttuld respcnd to each l ne iter identified in tre
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i referenced Federal Register table.
Each iteri shculd be addressed as it applies to the RSS and any sitigetlrig syster.(s) that ray be rtquired to function
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i during each postuleted ATWS event.
Each ron-coripliance situation should be l
idu.tified and appropriately justified.
t Please providc a respor.se to this nquest within 90 days of the date of this i
letter.
l Tbc infors.ation requested in this letter affects fewer than 10 respondents; q
therefore, CPB clearerce is nct required utider P.L.96-511, i
$1r4trely, 9
ll rerreth L. Heitner. Projer.t itarager Project Directcratc - !Y i
Divisico cf Reactor Projects - !!!,
j IV, V and Special Projects Enc 1csure:
As stated l-i cc w/ enclosure:
See next page DIS IBUTION i
i V ' W TDT 1
sFC & Local PCRs i
PD4 R/F l
0Crutchfield LFubensteiti FNocran KHeitner OCC-Roc 6v111e Edordan E0 rices ACRS (10)
Plant File FOIV:L/
.PDIV:Hid 00lV:0?I FMoona J
FPettner:jc JCalvo 11/l5/f 11/ t VSS 11/<J/E8
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T. C. l'4111ers 2
referenced Federal Register table.
Each iten should be addressed as it applies to tre FS$ aEd any Eltigating syster.(5) that may be required to function during each postulated ATWS event.
Each non-compliance situation should be identified and apprcpriately justified.
a Flease provide a restense to this request within 90 days of the date of this letter.
The inferr.ation requestes' in this letter affects fewer than 10 respordents; i
therefore, CPB clearar.ce is r,ct required under P.L.90-511.
Siricerely, s%
Verreth L. Feitr,er, Project Manager I
Freject Directerete - IV Divisicii cf Reactor Frojects - !!!,
IV, Y and Special Projects l
Enclosure:
As stated t
cc w/er.cicsure:
Sec rest regt l
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T.,
0, i:illiers, Jr.
Public Service Corrany of Colorado Fort St. Vrain t.c :
Mr. D. W. Warerbourg, Manager Albert J. Harle, Director i.uclear Ergineerirs tisisicr.
Fadiation Control Division Fublic Service Cortpany Departroent of Pealth cf Colorad:
421C fast lith Avenut P. O. Box B40 Denver, Colorado 80220 i
Denver, Coloraco E0201-CE40
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Mr. David Alberstein, Fanager Mr. Charles H. Fuller Fort St. Vrain Services Manager, fuclear Production CA f r.teractiet e1 Se rvices Corpcretiert erd Statier. Vanagtr Fest Office box 85608 Public Service Corpany of Colorado San Diego, Califernia 92136 16805 Weld County Feed 19-1/2 Pletteville, Colorado BCCEI Fr. P. L. Erey, Panager f.uclear Licensing and Resource tir. P. F. Tertir sen, i anager j
l'anager:trt Divisicr.
Curlity Assuranct Division Futlic Ser ice Cerpary of Col (>racc Fublic Service Cortpany of Colerado P. D. Lox E40 16E05 Weld County Read 19-1/2 Derver, Colorado 80201-0540 Platteville, Colorado 80651 Ser.ior Resident inspector Mr. D. D. Pock i
U.S. Pluclear Fagulatcry Corrinitt.
Fresident and Chief Executive Cfficer F. O. Ecx 640 Fut.lic Strvice Corpany of Colorado Flatteviilt. Coloradc E0f51 Post Office Ecx 640 Cenver, Colorado 00201-08(0 kelley, Star >cfield & 0'Ocrr,eli ATTf;:
l'r. J. k. T6 rpey Cerritreent Coritrol Frograr Fullic Service Corran) Euildir.g Ccordirator Foerr. 900 Fublic Service Corpeny of Colorado
!!0 1Ett. Street 2.420 W. 26th Ave. Suite 100 0 Denver, Colorato 80202 Denver, Colorado 80211 Fegional Adeinistrator, Regien 1Y U.S. tiuclear Fegulatcry Corrission 611 Ryan Pliza Drive Suite 1000 I
Arlirston, Texas 76011 l
Cisairran, Ecard of County Corrissioners l
cf Weld County, Colorado Crteity, tvicrut: ECf?!
Regicnal Representatise Faciation Prograts Environrental Frotection Agency i
1 Der.vtr Flace 99918th Street, Suite 1300 Denver, Coloraco EOK?-2413 l
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Et4LOSURE REOUEST FOR A0DIT10NAL INF0FFATION l
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Provide inforn:ation to confirc. to the staff that all pocsibit anticipated f
I operational transients which could occur at fort St. Vrain were considered f
j (define each transier.t and relate to the plant's existing accident /trarsient spectrum).
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For each anticipated operational transient considered, confire the operatfor l
J of the reserve shutdown system (RSP would be sufficient to mitigate f
j coratquences of the ever,t assunins a fatture cf the emissirig reactor trip j
syster(FTS)toscrar.thereacter.
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3.
Address the adequacy associated with manual initiation requirerents of
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the pSS as related to all possible postulated anticipated operaticrial l
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transients considered. The infcrmation should include a scenaric ansccitedwiththeanticipatedoperationaltransient(including i
related plerit operating ccrditions just prior to the trchsient) which f
I could result in the worst-case (shortest) tis.e that would t,e allowed to elapse before the FSS sust be activated ranually to shut down the
- k reactor in liet of the failed RTS.
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