ML20093G333

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Submits Response to RAI Re TS Change Request 171 Concerning Heatup & Cooldown Limit Curve Expiration Date Extension
ML20093G333
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 10/12/1995
From: Link B
WISCONSIN ELECTRIC POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20093G335 List:
References
VPNPD-95-080, VPNPD-95-80, NUDOCS 9510190022
Download: ML20093G333 (2)


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. Wisconsin  !

Electnc l POWER COMPANY l

231 W Michigan. PO Box 2046. Milwaukee.WI 53201 4 046: LG.1*^* MS VPNPD-95-080 10CFR50.4
1. 10CFR50.90 lOctober 12, 1995 l

l Document Centrol Desk U.S.. NUCLEAR REGULATORY COMMISSION Mail: Station P1-137 Washington, DC 20555 Lad es/ Gentlemen:

DOCKETS 50-266 AND 50-301 1 TECHNICAL SPECIFICATION CHANGE REOUEST 171 HEATUP AND COOLDOWN LIMIT CURVE EXPIRATION DATE EXTENSION

. RESPONSE TO REOUEST FOR ADDITIONAL INFORMATION POINT BEACH NUCLEAR PLANT. UNITS 1 AND 2 On May 26, 1994, we submitted Technical Specifications Change ,

Request 171, "Heatup and Cooldown Limit Curve Expiration Date J

i. Extension," which requested amendments to Facility Operating j Licenses DPR-24 a"d DPR-27 for Point Beach Nuclear Plant (PBNP),

Units 1 and 2, r actively. T1.e proposed amendments extended the operation of bott- mits with the current heatup and cooldown limit curves in the Tect.aical Specifications to 23.6 effective full power years (EFPY). On January 5 and April 25, 1995, in accordance K with NRC staff's requests, Wisconsin Electric provided additional

.information'regarding this matter.. On May 11, 1995, the NRC staff i requested additional: clarification of our submittal with respect to the neutron cross-section. library-used in supporting analyses.

This letter provides the requested-information.

In August 1995, Westinghouse! Electric Corporation issued Revision 3

-to WCAP-12795, " Reactor Cavity Neutron Measurement Program for Wisconsin Electric Power Company, Point Beach Unit 2." This 4

revision incorporates dosimetry results from fuel cycles 18 through 20, and implemented'thejlatest available nuclear cross-section data derived from ENDF/B-VI. 'WCAP-12795, Revision 3 is enclosed in support of the requested amendments.

The'results of WCAP-12795, Rev. 3 are consistent with the results determined in' Revision 2 for the PBNP Unit 2 limiting materials.

For the beltline circumferential weld (SA-1484) at 32.0 EFPY, the inside; surface fluence determined in Revision 3 is 2.49E+19 n/cm2 g(E > 1.0LMeV).-lThis is approximately 1% less than the fluence value determined in Revision 2. Based on our reviews, the SA-1484

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9510190022 951012 PDR ADOCK 05000266 g P- PDR. ,

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I Document Control Desk October 12, 1995 Page 2 weld remains limiting for the evaluation of the PBNP Unit 2 heatup and cooldown curves. Therefore, the heatup and cooldown limit I curve expiration date in the proposed Technical Specification '

remains valid for PBNP Unit 2.

During the 1995 PBNP Unit i refueling outage, neutron dosimetry was removed for fuel cycles 20 through 22. This dosimetry is currently l being evaluated by Westinghouse using the latest ENDF/B-VI cross-sections. We expect results to be available in carly 1996. Based on the close agreement between WCAP-12795, Revision 3 with previous l

. analyses, we expect the updated' Unit 1 analysis to be in close agreement with previous results. However, if the results change the projected effective period of the heatup/cooldown limit curves

'for PBNP Unit 1, Wisconsin Electric will request the appropriate amendment.

Please contact us should you have any further questions.

Sincerely, ^

1 l.

Bob Link Vice President i Nuclear Power l l

JRP/jg I l

Enclosure cc: NRC Regional Administrator NRC Resident Inspector Public Service Commission of Wisconsin l

l i

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