NPL-98-1020, Forwards Rev 1 to Calculation PBNP-IC-33, 4.16KV Rt UV Matrix Relays Uncertainty/Setpoint Calculation. Calculation Verifies That Setpoint Calculation Provided with 980528 Submittal Is Conservative,Per 980911 RAI

Forwards Rev 1 to Calculation PBNP-IC-33, 4.16KV Rt UV Matrix Relays Uncertainty/Setpoint Calculation. Calculation Verifies That Setpoint Calculation Provided with 980528 Submittal Is Conservative,Per 980911 RAI

ML20198A894
Person / Time
Site:	Point Beach
Issue date:	12/11/1998
From:	Kaminskas V WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20198A898	List: ML20198A901 NPL-98-1020, Forwards Rev 1 to Calculation PBNP-IC-33, 4.16KV Rt UV Matrix Relays Uncertainty/Setpoint Calculation. Calculation Verifies That Setpoint Calculation Provided with 980528 Submittal Is Conservative,Per 980911 RAI
References
NPL-98-1020, NUDOCS 9812170169
Download: ML20198A894 (4)

Text

• ~ r Wisconsin Electnc POWER COMPANY Point Beach Nuclear Plant (920) 755-2321 6610 Nuclear Rd., Two Rivers. WI 54241 NPL 98-1020 10 CFR 50.90 December 11,1998 Document Control Desk U.S. NUCLEAR REGULATORY COMMISSION Mail Station PI-137 Washington, DC 20555 Ladies / Gentlemen:

DOCKETS 50-266 AND 50-301 ADDITIONAL INFORMATION TECllNICAL SPECIFICATIONS CHANGE REQUEST 203 UNDERVOLTAGE ON 4 KV BUSES POINT BEACll NUCLEAR PLANT, UNITS 1 AND 2 By [[letter::L-98-431, Application for Amends to Licenses DPR-24 & DPR-27,modifying TS to Provide Specific Numerical Setting for Rt,Rcp Trip & AFW Initiation on Loss of Power to 4 Kv Buses.Rev 1 to Calculation 9334281-01 Re RCP Internal Voltage Decay,Encl|letter dated May 28,1998]], Wisconsin Electric Power Company, licensee for the Point Beach Nuclear Plant (PBNP), requested amendments to Facility Operatir;g Licenses DPR-24 and DPR-27 for PBNP Units 1 and 2, respectively. The purpose of the aquested amendments is to provide a specific numerical retting for reactor trip, reactor coolant pump trip, and auxiliary feedwater (AFW) initiation on loss of ,

power to the 4 KV buses. Existing Technical Specifications do not define a distinct numerical setting.

With that submittal, we provided a copy of the calculation supporting the proposed value for the trip and ,

AFW initiation settings. During a conference call with our Nuclear Regulatory Commission (NRC) J Project Manager and NRC technical reviewer on September 11,1998, the reviewer requested, and we i agreed to provide, the supporting uncertainty calculation surporting the setpoint calculation we had provided with our May 28,1998 submittal. 3 l

Enclosed is calculation PBNP-IC-33, Revision 1. This calculation verifies that the setpoint calculation provided with our May 28,1998, submittal is conservative and considered appropriate uncertainties.

We believe this calculation is responsive to your September 11,1998, request.

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- If you have any additional questions or require additional information, please contact us. l Si'ncerely, i

Vito A~. Kam nskas Manager, l

Regulatory Services & Licensing. 1 MAW / tat <

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NRC Regional Administrator. -

NRC Resident Inspector

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Na@,L 6o563 Fax 630 778 4343 November 23,1998 87000733 192 Wisconsin Electric Power Company Nuclear Power Department j 231 W. Michigan Street P.O. Box 2046 Milwaukee, WI 53201 A'ITENTION: Mr. Gene Gross In-tnanentation and Control Engineer

SUBJECT:

Point Beach Nuclear Plant Revise Calculation PBNP-IC-33 Contract Number 4500035998 Line Item 560 4.16KV Reactor Trip Undervoltage ,

Matrix Relays Uncertainty /Setpoint Calculation PBNP-IC-33 Revision I l

Dear Mr. Gross:

Per your request, Duke Engineering & Services is issuing Rev.1 of PBNP-IC-33; the 4.16KV Reactor Trip Undervoltage Matrix Relays Uncertainty /Setpoint Calculation This calculation has been revised to incorporate the Analytical Limit (AL) developed in Sargent and Lundy calculation 09334281-01 Rev.1. This calculation has also been revised the drift values from 18 months to 24 months i25% based on new as-found / as-left data.

This calculation concludes that the existing voltage setpoint is acceptable with rget to the existing Technical Specification Limit and the voltage analytical limit. This calculation also concludes that the existing time delay setting is acceptable with respect to the time delay analytical liniit.

By copy of this letter, DEAS calculation PBNP-IC-33 Revision 1 is being transmitted to you in accordance with Wisconsin Electric Procedure NP 7.2.4, Revision 1," Calculation Preparation, Review, and Approval."

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November 23,1998 87000733-192 Page 2 of 2 l

Should you r quire additional information, please feel free to call me at (630) 778-4453.

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Proj t Manager gwstandi@dukeengineering.com W;\Electrica!\PROJECITPBNP\V03333\LE7TERS\l92-870733. DOC i

Enclosure 1 cc: Paul Gogan (w/o)

Scott Tasson (w/1 for Information Only)

Randy Benedict (w/1 for Information Only) )

Jeffery Stukus - Volian (w/l for Information Only) i File T7.4.4 Copy to QA File i

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