ML20127J323
| ML20127J323 | |
| Person / Time | |
|---|---|
| Site: | Monticello, Prairie Island  |
| Issue date: | 03/04/1977 |
| From: | Goller K Office of Nuclear Reactor Regulation |
| To: | Bardenbring S MINNESOTA, STATE OF |
| References | |
| NUDOCS 9211190282 | |
| Download: ML20127J323 (2) | |
Text
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- l.M 01 1977 Ms. Sandra S. Gardebring Cxecutive Utrector flinnesota Pollution Control Auency 1935 West County Road 82 Roseville, !!innesota 55113 Cear !!s. Cardebring:
Thank von for your letter of Febntary 10, 1977, wi th your co-ments -
recarcino tie 90rthern States Power Company (USP) renuests of January 31, 1977, to amend the Pr11ria 'sland and l'onticello operatinn licenses with respect to fire detection and orotection systens.
Your coments 5ere -in regard to (1) detector operability, (%) the detector functionaoility test schecule and (3) requirenent of ;hoto-electric ocacity detectors as well as 1on cetectors.
The wanrment reauests which gen 9 rated your comments arc narr of a connleto fire nrntection review of the HSP nuclear plants. This review aas haaun with our latter to f4SF dated !!3y 11,1976. Gur letter nf fcptember 30, 1976, requested that fiSP propone Technical Specifications for the existing fire protection systen and our letter of Decemer 6, 1376. enclosed waole Tecnnical Specifications to provide cuidance.
Accordinc to our records you snoulv bave received ccptus of our letters.
The Januarv *:1,1977 amndment rar19ests are for T4chnical Specificatinns on the nresent fir + protection systems in response to our Septow er 30, 1970 letter and are an interi, nessure until the fire hazards analyses are comoletec and our staff has revieven and accented them. At that tiee the Technical snocifications trill ne revised to include the revisions to the fire protection systems tha t result from the revious.
la regarri to your comments on tne 1SP amenenent request datoa january-21, 1977, cr>,nents 1 and 2 refer to the traposca interin Tecnnical 50ccifications on the exi'.tf on fire protection systents.
These croposed Technical Snecifications are carrently under revieu.
se.till'De 91easeu to consider your connents in' cur review of tnoso proonsou interiticennical Soccifications.
Voor coment 3 will uo considered as a mrt nt ne cuviu of the fire nazarcs analv'.es sinco it ronresents a channe to the existint! tire protection system.
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! trust that this renly has been responsive to your comments.
Sincerely.
Originni signed by:
Kari R. >ller v.arl.. Coller, Assi stant Director for Operatinr1 Reactors Division of Oeerating Peactors j' '
DISTRIBUTION Docket (50-263~'
50-282 50-306)
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February 10, 1977' Mr. Victor Stello, Director l
Division of Operating F.cactors j
U.S. 11uclear Ucgulatory Corraissicn Machington, D.C.
2 v.s 53 Dear Mr. Stollo*
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On January 31, M771:cr.thern Statcr Pov er filed regycccc to cmene.
the I:onticello cnd Prairic Island licenscs to iacurpernte interiu j
operationc.1 and surveillt.nce requirements with resrect to firo 4
l dotcetion and protection cyctcms.
Becausn Loth submittcle cre rc very cimilar, my comments vill apply to each c:<cctSt there noted.
The Tech Spec requircront states that !!-l out of M' dctcctors in a zonc must be at all timos eperabic.
HowcVer, many cones arc guarded by only one detector, l'o'w cemittedly some zones arc of looser importance, but for thore zones where firc could rore serioucly threaten safety cystenc more than one detcetor chould be rcquired.
The Prairic Isinnd cohic spread!r.g rocm fol]n in this latter category.
The Tech Spec functionability test schedule, every 36 montha at Prairie Island and every 12 months at Penticello, appcars to be i
too lenient in vice of tha few nunber of detectcrs in some concs.
We do not knov what to suggest for more frequent tentirg, but we do note the Monticello plan to insrect and clean detectors overy i
six montPs.
If dirt and duct cecurtulation is apt to be a twicc yearly problen to the point of requiring cleaning, thcn therc at pcare -to us a possibility for detec'.or impairrcent due to c.ither i
the dirt or the cleaning.
!!ov dirty twy a detector 1.ccccc Lefore impairecnt is serieuc?
II: any event we woulu think function test-should occur uore frequent ly,.perhcre as cif tc n as tPc dirt
-inspection.
We note that for the most part ion dctcetors arc relied uI.cn to carry t!.c burden of fire detct. tion.
He wou]d suggcot that in the critical plcnt :*.ones that tbc photo-electric opccit.y deucetor type be also required.
Sincerely, jdpAv(.
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,U 26 ct-ring SandraS.h.rcef.or E::ccutivc
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