ML20236F392

Safety Evaluation Supporting Amend 14 to License NPF-47

ML20236F392
Person / Time
Site:	River Bend
Issue date:	10/26/1987
From:	Office of Nuclear Reactor Regulation
To:
Shared Package
ML20236F387	List: ML20236F384 ML20236F392
References
NUDOCS 8711020126
Download: ML20236F392 (3)

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. NUCLEAR' REGULATORY COMMISSION !

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SAFETY EVALUATION BY1THE 0FFICE 0F' NUCLEAR REACTORIREGULATION'

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-" SUPPORTING. AMENDMENT NO[l'4' ETO FACILITY 0PERATING LICENSE N0; NPF-47','

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, RIVER BEND. STATION! UNIT li.

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1.0 INTRODUCTION

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,k'y By letter dated; August 5;:1987Easisupplemen'ted A'ugustl24M 1987[ Gulf [1_ l a

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" States Utilities CompanyL(GSU) (the li'ensee)fre'queste'd:an; amendment--toi c

z Facility: Operating License-NovNPF-47!forf the LRivEr Bend Station,!UnitL1.

'The! proposed amendment would modifyTlice'nseicondition12.C(14),sAttachment?g

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,1 5, Item 2,Ltodeferthe' installation'offneutron:fluxdinstrumentationithati 4

conforms'to Regulatory Guide ;1.97ERevisioni2;; from prior 2toistartuptfrom> -

7 the fipst refueling outage until priorito startupffrom the second?refuelingl N'

outage.

License.conditionL2.C(14)L Attachment;5,iltem 2,1 requires that?

prior.to startup from the1first refueling outage,6the3 licensee ~shall) d implement modifications (in'stallation or. upgrade)lforEeight' items 4 consistent' i

with the guidance of; Regulatory Guide?1.97,. RevisionL2/unlessrpriori li approval of: an alternate design of theseLitemsfisigranted:byf the:NRC-staff.

Theselitems~are:

a) neutron ~ flux; 9

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coolant level 11n the reactor;"

1 c) suppression pool' water level;n

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l-d) drywell atmosphere temperature;L _

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primary system safety! relief valve position;;

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_ standby;1iquid control s'ystem!storlpes.tankilevel;(

g) emergency ventilation damper posit 15; sand; y

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ai rborne, radiohalogens. and lparticulatesi.

4 the NRC staf'f issued a sdfety)eviluation?(SE)i.,

a On June 30, 1986, regarding the1 River Bend: Station conforman'ceLto Regulatory) Guide-1.97b y

This safety. evaluation concluded thattthe River 1 Bend: Station design was" acceptable?except for.. neutron' flux-in'strumentation..-iThe stafff found?thati the existing neutron flux ~ lnstrumentationfwastacceptableifor?interimt ;. 4 operation; however,'the SE concluded that'priorLto; startuplfrom;the'firsth '

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refueling. outage, theilicensee must instal 1 Lor upgrade!the neutron fluxA

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instrumentation to conform toc. Regulatory Guide'.1.97,LRevision :2,"andj M

10 CFR?50.'49.

The license. condition ^ also req'uirestthatithe other; items,1 listed above,:be' installed or upgraded prior toestartup fromithelfirst5 '

refueling _ outage.-

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tBy: letter l dated August:5, 1987, asLsupplemented August 124,31987;, ithe a y

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'1icensee requested that;the implementation dateiforfthelinstallationiory n

" upgrade of..the" neutron flux instrumentation be changed.from priorLtoLthei

'd first refueling outageito prior toistartup' followingethe Jsecond refueling; 3

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. outage.

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2.0 EVALUATION The licensee'statesithatCthey haveLfollowedIthe[indtryjevelIpme t df i

neutron' flux; instrumentation that~ meets; Regulatory GuideL1;97LandKunti1[

recently,.theyihave not been'able'to evaluateLnewly; developed equipments. ;'

The?1icensee indicated that;Jcurrently,9a licensingitopical? report;is R

H being prepared to present:the(BWR:0wner's Groupf position ori' Regulatory; J

Guide 1;97 requirements for:neutronLflux. instrumentation.

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Wj furtherLstates that due toithe statusiof; this; work,Eschedulingh procurement and installation of allicensed system meeting'thelrequirementssofjRGil.97) e

, d is not possible during.the firstyrefueling outage. X m

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Because Category 1 neutron flux-monitoring'systemsLthatjpotentially me'et,

allof the criteria of. Regulatory Guide L1.97 have' only1 recently; becomeL available to.the industry and there is existing. neutron f1'ux instruments-1 tion thatLthe staff found; acceptable for. interim. operation,:and becausec

.there are unrelated systemsLinfplace'to provide operator.slwith' sufficient 5 1

data to assess reactor conditions (e.g.,(contro1Lrod; position' monitors,J i

reactor vessel level and pressure' monitors) in:the;unlikely event ofjan 1

4 accident condition, the staff finds that the: licensee's' request for"

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extension'.to the ser.ond refueling outagefis' acceptable.

In reaching.this' finding, the/ staff observed'thAt developments'b9?'

h suppliers of neutron flux.monit'oringisystems sho'ul.d make unnecessary;any; f

1 further deferral of compliance with this' license / condition.1

3.0 ENVIRONMENTAL CONSIDERATION

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This amendment involves a' change toL a requirementiwith respect? to-thA Installation or use of -a facility component 1ocatedNithin the! restricted?

6 area asidefined in 10 CFR Part.20.

The staff has Neterminedithatithex.

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amendment involves !no!significant:increaseLin the amountskand,no signifi-cant change in <the.. types, of'any effluentsithat"sayLbe < releasedroffsiteh and that1there is no -significant Lincrease:in; individual?or;cumulativeu d

occupational radiation exposure.

The Commission hasi previously! issued La R

proposed finding' that;this amendmentoinvolves no:significant hazards!

consideration-and there has been no:public comment on such finding.:

Accordingly,-this< amendment meetstthe eligibility; criteria?for categoridali 1

4 exclusion set-forth in 10 CFR 51.22(c)(9). :1 Pursuant to:10 CFR 51.22(b)L no environmental impact 1 statement: nor environmentallassessment(need be~

>j prepared in connection-withithe issuance of/ this amendment'.-

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.4.0 CONCLUSIM I

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The: staff--has concluded, based'on the considerations -discussed:above, that:

(1) there is reasonable assurance that'the. health and; safety.of~

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.s the-public;will.notbe~ endangered.,by.operationinfthe. proposed. manner,l(and

-(2Vsuch activities-will belconducted 'in complianc~e wi.th theJCommissio'n's1 regulations!and the. issuance of this amendmentiwill..not be inimical.toithe. '

common, defense land security.or to:the. health and:'safetyfofothe;public.a The: staff;therefore; concludes'.that:the.; proposed changes:arelacceptabls, andzthey:are hereby inco.rporated into.the RiverLBend. Unit 111icense.

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Principali Contributor: ;W. Paulson~

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1l 0dt' b'er 26 1987 '

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