ML100210135

Application Accepted - Braidwood/Byron LAR Re. Astrum Best Estimate LOCA Methodology (ME2941-44)

ML100210135
Person / Time
Site:	Byron, Braidwood
Issue date:	01/20/2010
From:	David M Plant Licensing Branch III
To:	Simpson P Exelon Corp
M. J. David
References
TAC ME2941, TAC ME2942, TAC ME2943, TAC ME2944
Download: ML100210135 (2)

Text

From: David, Marshall Sent: Wednesday, January 20, 2010 2:19 PM To: patrick.simpson@exeloncorp.com Cc: ken.nicely@exeloncorp.com; Campbell, Stephen; Cranston, Gregory; Parks, Benjamin; Mendiola, Anthony; Ward, Leonard; Elliott, Robert; Hamm, Matthew

Subject:

Application Accepted - Braidwood/Byron LAR re. ASTRUM Best Estimate LOCA Methodology (ME2941-44)

Pat, By letter dated December 16, 2009, Exelon Generation Company, LLC (the licensee) submitted a license amendment request (LAR) for Braidwood Station, Units 1 and 2, and Byron Station, Unit Nos.1 and 2 (ADAMS Accession No. ML093510099). The LAR proposes to revise Technical Specification (TS) Section 5.6.5, "Core Operating Limits Report (COLR)," to replace the existing large break loss-of-coolant accident (LOCA) analysis methodology. Specifically, the proposed change replaces a current reference with a reference to WCAP-16009-P-A, "Realistic Large Break LOCA Evaluation Methodology Using Automated Statistical Treatment of Uncertainty Method (ASTRUM)" in TS 5.6.5.b. The purpose of this message is to provide the results of the Nuclear Regulatory Commission (NRC) staff's acceptance review of this amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review was also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations (10 CFR), an amendment to the license must fully describe the changes requested and follow, as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.

The NRC staff has reviewed your application and has concluded that it does provide technical information in sufficient detail to enable the NRC staff to proceed with its detailed technical review and make an independent assessment regarding the acceptability of the proposed amendment in terms of regulatory requirements and the protection of public health and safety and the environment. If additional information is needed for the NRC staff to complete its technical review, you will be advised by separate correspondence.

In accordance with our process as described in LIC-109, "ACCEPTANCE REVIEW PROCEDURES," I am placing a copy of this email in ADAMS as a publicly-available, official agency record.

Sincerely, Marshall David Senior Project Manager (301) 415-1547

E-mail Properties Mail Envelope Properties (0046140293E11F408991442DB4FE25CA02940F961D)

Subject:

Application Accepted - Braidwood/Byron LAR re. ASTRUM Best Estimate LOCA Methodology (ME2941-44)

Sent Date: 1/20/2010 2:19:30 PM Received Date: 1/20/2010 2:19:30 PM From: David, Marshall Created By: Marshall.David@nrc.gov Recipients:

patrick.simpson@exeloncorp.com (patrick.simpson@exeloncorp.com)

Tracking Status: None ken.nicely@exeloncorp.com (ken.nicely@exeloncorp.com)

Tracking Status: None Stephen.Campbell@nrc.gov (Campbell, Stephen)

Tracking Status: None Gregory.Cranston@nrc.gov (Cranston, Gregory)

Tracking Status: None Benjamin.Parks@nrc.gov (Parks, Benjamin)

Tracking Status: None Anthony.Mendiola@nrc.gov (Mendiola, Anthony)

Tracking Status: None Leonard.Ward@nrc.gov (Ward, Leonard)

Tracking Status: None Robert.Elliott@nrc.gov (Elliott, Robert)

Tracking Status: None Matthew.Hamm@nrc.gov (Hamm, Matthew)

Tracking Status: None Post Office:

HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 22971 1/20/2010 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: