ML12121A694

Request for Additional Information Related to License Application for Measurement Uncertainty Recapture Uprate

ML12121A694
Person / Time
Site:	Byron, Braidwood
Issue date:	05/10/2012
From:	Joel Wiebe Plant Licensing Branch III
To:	Pacilio M Exelon Nuclear
Wiebe J
References
TAC ME6587, TAC ME6588, TAC ME6589, TAC ME6590
Download: ML12121A694 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 10, 2012 Mr. Michael J. Pacilio President and Chief Nuclear Officer Exelon Nuclear 4300 Winfield Road Warrenville, IL 60555 SUB,JECT:

BYRON STATION, UNIT NOS. 1 AND 2, AND BRAIDWOOD STATION, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION RELATED TO LICENSE APPLICATION FOR MEASUREMENT UNCERTAINTY RECPATURE UPRATE (TAC NOS. ME6587, ME6588, ME6589, and ME6590)

Dear Mr. Pacilio:

By letter to the Nuclear Regulatory Commission (NRC) dated February 20,2012, Exelon Generation Company, LLC submitted a response to the NRC staff request for additional information dated February 14, 2012, for the Braidwood Station, Units 1 and 2, and Byron Station, Unit Nos. 1 and 2.

The NRC staff is reviewing your response and, based on a clarification teleconference with your staff on April 25, 2012, has determined that additional information is required to complete the review. The specific information requested was forwarded to your staff via e-mail on April 30, 2012, and is included in the enclosure to this letter. During discussions with your staff on April 30, 2012, and May 7, 2012, it was agreed that you would provide a response by May 14, 2012.

The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRC's goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requE:::c,ed response date, please contact me at (301) 415-6606 oel S. Wiebe, Senior Project Manager lant Licensing Branch 111-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. STN 50-456, STN 50-457, STN 50-454 and STN 50-455

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION BYRON STATION, UNIT NOS. 1 AND 2, AND BRAIDWOOD STATION, UNITS 1 AND 2 DOCKET NOS. STN 50-454, STN 50-455, STN 50-456 AND STN 50-457 In reviewing the Exelon Generation Company's (Exelon's) response dated February 20, 2012, related to the NRC staff request for additional information dated February 14, 2012, for the Braidwood Station, Units 1 and 2 and Byron Station, Unit Nos. 1 and 2 measurement uncertainty recapture (MUR) power uprate application, and in consideration of the clarification teleconference on April 25, 2012, the NRC staff has determined that the following information is needed in order to complete its review:

In your response to NRC/EMCB Request 8, you listed Balance of Plant/Nuclear Steam Supply System piping systems that were assessed for MLiR power uprate conditions.

For those listed piping systems, provide a summary table including the temperature and associated service conditions used in the analysis of record, under current licensed thermal power and for MUR power uprate conditions.

During a phone call on May 7, 2012, the staff clarified that the summary table needed only to include, for each of the listed piping systems, three Temperatures for the worst case (i.e., largest Temperature increase due to MUR). The Temperatures are the design basis analysis Temperature, the current licensed thermal power Temperature, and MUR Temperature.

Enclosure

ML12121A694 LPL3-2JLA LPL3-2/PM SRohrer JWiebe 5/10/12 05/10/12