ML20024A893

Application for Amend to Licenses DPR-42 & DPR-60,changing Tech Spec Section 3.10 Resulting from New LOCA Analysis

ML20024A893
Person / Time
Site:	Prairie Island
Issue date:	06/24/1983
From:	Musolf D NORTHERN STATES POWER CO.
To:
Shared Package
ML20024A891	List: ML20024A890 ML20024A893 ML20024A898 ML20024A901
References
NUDOCS 8307010149
Download: ML20024A893 (3)

Text

,

UNITED STATES NUCLEAR REGULATORY COMMISSION NORTilERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLA!TT Docket No. 50-282 50-306 REQUEST FOR AMENDMEITT TO OPERATING LICENSE NOS. DPR-42 & DPR-60 (License Amendment Request Dated June 24, 1983)

Northern States Power Company, a Minnesota corporation, request authorization for changes to the Technical Specifications as shown on the attachments labeled Exhibit A and Exhibit B. Exhibit A describes the proposed changes along with reasons for the change. Exhibit B is a set of Technical Specification pages incorporating the proposed changes. Exhibit C is the Exxon Nuclear Corporation technical report.

This letter contains no restricted or other defense information.

NORTHERN STATES POWER COMPANY By dDaviddus Musoif \

Manager - Nuclear Support SerM ces On this N J/ day of Omw , /983 before me a notary public in and for said County, personally appeared David Musolf, Manager - Nuclear Support Services, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the contents thereof and that to the best of his knowledge, information and belief, the statements made in it are true and that it is not interposed for delay.

&O- 0/ h/1ML.'

U DODY A. BROSE ,  !

l NOTARY PUBLIC = MINNESOTA l j; HENNEPIN COUNTY j

. My Commission Everes oec. 26,1989l ,

^ '

~

83070EdIM^^830627^^

PDR ADOCK 05000282 P

PDR i M

- s EXHIBIT A Prairie Island Nuclear Generating Plant License Amendment Request - Dated June 24, 1983 Proposed Changes to the Technical Specifications Appendix A of Operating License DPR-42 and 60 Pursuant to 10 CFR 50.59 and 50.90, the holders of Operating License DPR-42 and 60 hereby propose the following changes to Appendix A, Technical Specification:

1. BU(E,) curve and Fq (TS-iv, TS.3.10-1, TS.3.10-2, TS.3.10-9, TS.3.10-11; Figutes: TS.3.10-5 and TS.3.10-7)

Proposed Change limit by changing "2.21" to "2.32". Change the BU(E )

Change curve to the be Fg' 1.0" for all values of peak pellet exposure from 0 to 55,000 GWD/MTU.

Reason for Change This change will allow the plant to operate with higher Fq's and peak pellet burnups. Current cycle designs have very little margin to current Fq and burnup limitations. To prevent periodic derates and to provide more margin to limits, a new LOCA analysis was performed using new methodology to justify the higher limits.

Significant Hazards Evaluation Attachment C provides the results of the analysis done by Exxon Nuclear Corporation to support this change. This change will not result in an increase to the consequences of a previously-analyzed accident since more margin to 2200*F peak clad temperature limit is shown. Operation of the plant in accordance with the proposed change therefore will not:

(1) involve a significant increase in the probability or consequences of an accident previously evaluated; or (2) create the possibility of a new or different kind of accident from any accident previously evaluated; or (3) involve a significant reduction in a margin of safety.

a5d

/  ;

/. . . .

/- s I

s 2.DefinitionofFh(PageTS.3.10-9)

Proposed Change Change the definition of F from a " neutron flux" comparison to a'" heat flux comparison.

Reason for Change This change will make the definition of Fh consistent with the definition of Fq(z).

Significant Hazards Evaluation Since the concern during an accident is the clad temperature, it is more appropriate to derive and limit heat flux rather than neutron flux.

This change is purely an administrative cht.nge to the Technical Specifica-tions. Operation of the plant in accordance with this proposed change will not: s s  %- - % , ,

(1) involve a significant increaye in the probability or consequences of an accident previously evaluated; or (2) create the possibility of a ~ new or s different kind of 'secident from any ,

accident previously evaluated; or (3) involve' a significant reduction in t a margin of safety.

E =4 '

4

.4 eg Vg h

he A'

.g

'v J.

v 4 ,f;g, --