ML20101C244
| ML20101C244 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 03/01/1996 |
| From: | Link B WISCONSIN ELECTRIC POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| VPNPD-96-018, VPNPD-96-18, NUDOCS 9603180130 | |
| Download: ML20101C244 (1) | |
Text
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Wisconsin Electnc l
POWER COMPANY l
l 231 W M.choon. PO bon 2046. Mawaukee WI 53201 2046 r41412202345 VPNPD-96-018 10CFR50.4 10CFR50.90 March 1,1996 Document Control Desk US NUCLEAR REGULATORY COMMISSION l
Mail Station PI 137 Washington,DC 20555 Ladies / Gentlemen:
i DOCKETS $0-266 AND 50-301 TECllNICAL SPECIFICATION CilANGE REOUEST 171 IIEATUP AND COOLDOWN LIMIT CURVE EXPIRATION DATE EXTENSION RESPONSE TO REOUEST FOR ADDITIONAL INFORMATION POINT BEACil NUCLEAR PLANT. UNITS I AND 2 On May 26,1994, we submitted Technical Specifications Change Request 171, "Heatup a;id Cooldown Limit Curve Expiration Date Extension," which requested amendments to Facility Operating Licenses DPR-24 and DPR-27 for Point Beach Nuclear Plant (PBNP), Units 1 and 2, respectively. The proposed amendments extend the operation of both units with the current heatup and cooldown limit curves in the Technical Specifications to 23.6 effective full power years (EITY). On February 27,1996, the NRC stafirequested clarification of our submittal with respect to the limiting materials applicable to this analysis. This letter provides a clarification of the information previously provided for PBNP Units 1 and 2.
In the analysis of the heatup and cooldown curves for PBNP, the limiting weld in either Unit 1 or Unit 2 with respect to 2
Iluence is the circumferential weld (SA-1484) in Unit 2. The 1/4-thickness fluence at this location is 1.39x10" n/cm (E > 1.0 MeV) at 23.6 EFPY. The latest fluence assessment for PBNP Unit 1 (WCAP-12794, Rev. 3 " Reactor Cavity Neutron Measurement Program for Wisconsin Electric Power Company, Point Beach Unit 1") determined that the fluence at the limiting weld in Unit I (SA 1101) is less than this fluence.
With respect to weld chemistry, the PBNP Unit I circumferential weld (SA 1101) is limiting and its chemistry factor of 180T was used in the analysis. The use of these limiting fluence and chemistry values envelopes the most conservative conditions for the two reactor vessels. Use of these values resulted in a 1/4-thickness adjusted reference temperature of 258.47 at 23.6 EFPY.
We believe that these clarifications answer all outstanding questions regarding TSCR 171. Please contact us should you desire any additional information.
Sincerely, l
fee 8 4 L1sk Bob Link i
Vice President Nuclear Power 9603180130 960301 PDR ADOCK 05000266 JRP P
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NRC Regional Administrator NRC Resident inspector Public Service Commission of Wisconsin pi N
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