ML12117A175

Request for Additional Information Regarding License Amendment Related to Measure Uncertainty Recapture Power Uprate

ML12117A175
Person / Time
Site:	Mcguire, McGuire
Issue date:	04/27/2012
From:	Jacqueline Thompson Plant Licensing Branch II
To:	Repko R Duke Energy Carolinas
Thompson J
References
TAC ME8213, TAC ME8214
Download: ML12117A175 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 April 27, 2012 Mr. Regis T. Repko Vice President McGuire Nuclear Station Duke Energy Carolinas, LLC 12700 Hagers Ferry Road Huntersville, NC 28078

SUBJECT:

MCGUIRE NUCLEAR STATION, UNITS 1 AND 2, REQUEST FOR ADDITIONAL INFORMATION REGARDING LICENSE AMENDMENT RELATED TO MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. ME8213 AND ME8214)

Dear Mr. Repko:

By letter dated March 5, 2012, Duke Energy Carolinas, LLC (the licensee), submitted a proposed license amendment to change the McGuire Nuclear Station, Units1 and 2 (McGuire 1 and 2),

Technical Specifications (TSs). The proposed change revises the TSs to implement a measurement uncertainty recapture power uprate for McGuire 1 and 2.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that additional information is needed in order to complete our review. The enclosed document describes this request for additional information. A written response should be provided to the NRC staff within 30 days of the issuance of this letter in order to support our timely review of this application.

If you have any questions, please call me at 301-415-1119.

Sincerely, Jon Thompson, Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-369 and 50-370

Enclosure:

RAI cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REGARDING LICENSE AMENDMENT REQUEST RELATED TO THE IMPLEMENTATION OF A MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE MCGUIRE NUCLEAR STATION. UNITS 1 AND 2 By letter dated March 5, 2012 (Agencywide Documents Access and Management System, Accession No. ML12082A210), Duke Energy Carolinas, LLC (Duke Energy, the licensee),

submitted a license amendment request (LAR) to change the McGuire Nuclear Station, Units 1 and 2 (McGuire 1 and 2), Technical Specifications (TSs). The proposed change revises the TSs to implement a measurement uncertainty recapture [MUR] power uprate for McGuire 1 and 2.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the licensee's submittal and determined that the following additional information is needed in order to complete our review:

1. In Enclosure 2 of the LAR,Section V.1.D, "Grid Stability," on page E2-73, the licensee stated that:

A Generation System Impact Study evaluation was completed and found to be acceptable for the installation of an additional 80 [mega-watt electric] MW of generating capacity at McGuire Unit 1 and Unit 2 located in Mecklenburg County,

[North Carolina] NC. This capacity increase is due to the Measurement Uncertainty Recapture (MUR) uprate, the High Pressure [HP] Turbine replacement and new electrical Generators/Exciters ....

Regarding above, please provide the following additional information:

a. Provide a split of the 80 MW of additional generating capacity between the MUR power uprate and the HP Turbine replacement.

b. Provide the maximum MW generation expected at each unit at the McGuire Nuclear Station corresponding to an 80 MW capacity increase.

c. Provide the MVARs (mega-voltampere-reactive) required, corresponding to the maximum MW generation expected, based on the agreement with the transmission system operator and meeting the voltage requirement at the switchyard.

Enclosure

- 2

d. Provide the maximum capacity of new generators in terms of MVA (mega-voltampere) and power factor (preferably provide generator capability curves).

2. Provide the ampere rating of 24 kV (kilovolt) isolated-phase buses to verify its capacity corresponding to the maximum generation expected in terms of MW and MVARs (after the 80 MW increase in generation).

3. Provide a legible (preferably electronic) copy of the one line diagram for the main power distribution system showing ratings of major equipment such as power transformers, and new generators.

4. In Enclosure 2 of the LAR,Section V.1.C, "Environment Qualification [EQJ of electrical equipment," on page E2-73, the licensee stated that:

In accordance with the McGuire [1 and 2J design change process, any specific component modifications that may be required to support the MUR uprate will be evaluated against the EQ Program requirements.

The NRC staff expects that any specific component modification that may be required to support the MUR power uprate will be evaluated against the EQ Program requirements prior to approval of the LAR by the NRC staff. Therefore, please complete the evaluation of the MUR power uprate against the EQ Program requirements and provide the results of this evaluation.

ML12117A175 OFFICE NRRlLPL2-1/PM NRRlLPL2-1/LA NRRlLPL2-1/BC NRRlLPL2-1/PM NAME JThompson SFigueroa NSalgado JThompson

DATE 04127/12 04/26/12 04/27/12 04127/12