ML20206E011
| ML20206E011 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 11/04/1988 |
| From: | Calvo J Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20206E015 | List: |
| References | |
| NUDOCS 8811170358 | |
| Download: ML20206E011 (4) | |
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7590-01 OhllED STATES MUCLEAR REGULATORY _C0btlSS10N GULF STATES OllLITIES COPPANY 99.c,x!y, pp,, spy,4,5,8 l
E NV1 RCM;E,NJ,A,L, A,5S,E SS!'!p,T, App, f,lppj pp, pf
$9. 519FJfJ.C.A.HJ.JFfACI The U.S. Nuclear Regulatory Comissiun (the Comission) is considering the issuance of an amendment to Facility Operating License No. NPF-47 issued to Gulf states Utilities Company, (the licensee), for operation of the River Bend Station, Unit 1, located in West Feliciana Parish, Louisiana.
ENVIROM' ENTAL, A,$SES,$t'EpJ 3.dy,n,t if,1,c a,t,i,o,n,,of,,t,hp, P,rpp o s e d A c t i o n The proposed amendeents would revise the provisions in the Technical Specifications (TS)relatingtothesetpointsandlimitsassociatedwith recirculation loop operation to allow single recirculation loop operation.
The proposed action is in accordance with the licensee's application for amendment dated April 6, 1988, as supplemented October 20, 1988.
Nee,d,for the Proposed Action The proposed change to the TS is required in order to provide the licensee with the capability to operate with one operable recirculation loop in the event that the second recirculation loop becomes incperable.
Environmental Irpacts of the Propp, sed Action The Comission has completed its evaluation of the proposed revisions to the Technical Specifications. The proposed revisions would specify setpoint and limit requirements for r, ingle loop operation. The safety limit minimum critical power ratio would be not less than 1.08 (1.07 for two loop operation) fjjligockosooo33g 35s esito4 P
Poc
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to raintain adequate margin to boiling transition; the maximum average planar linear heat generation rate would be 84% of the two-loop valves to limit the i
peak clad temperature to 2200'F as required by 10 CFR 50.46 in case of a loss of coolant accident; the recirculation pump drive flow wculd be limited to
'6 33,000 gallons per minute based on measurenents regarding vibration at a foreign reactor; and other requirements for single loop operation regarding thermal-hydraulic stability limits, limits to avoid thermal stratification of reactor coolant in the botton head because of thermal stress considerations, themal power limit, recirculation flow control mode, jet pump operability, i
recirculation flow mismatch, and average power range monitor biased scram and rod block setpoints. These changes would assure that adequate safety margins
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wou1d be maintained during single loop operation. No changes to the TSs would be rade regarding two loop operation. Therefore, the proposed changes do not increase the probability or consequences of accidents, no changes are beirs nade in the types of any effluents that may be released offsite, and there is
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a no significant increase in the allowable individual or cumulative eccupational radiation exposure. Accordingly, the Cornission concludes that this proposed l
action would result in no significant radiological environmental impact.
i With regard to potential nonradiological inpacts, the proposed change to I
the TS involves systems located within the restricted areas as defined in 10 CFR Part 20.
It does not affect nonradiological piant effluents and has no other l
l environmental impact. Therefore, the Comission concludes that there are no j
significant nonradiological environeental impacts associated with the proposed amendment.
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3 The t;otice of Consideration of Issuance of Anendments and Opportunity for fearing in connection with this action was published in the FEDERAL REGISTER on !?ay 13,1988 (53 FR 17131).
No request for hearing or petition for leave l
to intervene was filed following this notice.
Alternative to the Proposed Action Since the Coer11ssion concluded that there is no significant adverse environmental effect that would result from the proposed action, alternatives with equal or greater envircrrental impacts need not be evaluated.
The principal alternative would be to deny the requested amendrent. This l
would not reduce environmental intpacts of plant operation and would result in reduced operational flexibility.
Alternative Use of Re,so,urces This action does not involve the use of resources not previously censidered in the Final Environmental Statenient for the River Bend Station, Unit 1, dated January 1985.
Agencies and Per_ sons Consulted j
The NRC staff has reviewed the licensee's request and did not consult i
other agencies or persons.
F!t: DING OF NO S.I.G.NIFICANT I.M.P.A.C.T The Cosuiission has determined not to prepare an environmental itipact statement for the proposed license amendment.
Based upon this environmental assessment, we conclude that the proposed action will not have a significant adverse effect on the quality of the hunan envirer. rent.
For further details with respect to this action, see the application for arendeent dated April 6,1988, as supplemented October 20, 1988, which is
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4 availt.ble for publ,ic inspection at the Comission's Public Docurent Room. 0120 L Street, N.W., Washington, D.C., and at the Governcent Docunents Departrent, Louisiana State University, Caton Rouge, Louisiana 70803.
Dated at Rockville, Faryland, this 4th day of November,1988.
FOR THE NUCLEAR REGULATORY C0ttlSSION
/ose.'G, hws fun ~
J A. Calvo Director Project Directorate - IV Division of Reactor Projects - !!!,
IV, y and Special Projects Office of Nuclear Reactor Regulation i
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