ML15023A214

2015/01/23 NRR E-mail Capture - Diablo Canyon, Units 1 and 2 - Acceptance Review for the Application of Leak-Before-Break in the Fuel Structural Analysis to Satisfy 10 CFR 50.46(b)(4) (TAC Nos. MF4988 and MF4989)

ML15023A214
Person / Time
Site:	Diablo Canyon
Issue date:	01/23/2015
From:	Lingam S P Plant Licensing Branch IV
To:	Richardson M Pacific Gas & Electric Co
References
TAC MF4988, TAC MF4989
Download: ML15023A214 (2)

Text

1NRR-PMDAPEm ResourceFrom:Lingam, SivaSent:Friday, January 23, 2015 9:43 AMTo:mjrm@pge.comCc:Oesterle, Eric; Lyon, Fred; Schrader, Kenneth (KJSe@pge.com); Soenen, Philippe R (PNS3@pge.com); Burkhardt, JanetSubject:Diablo Canyon, Units 1 and 2 - Acceptance Review for the Application of Leak-Before-Break in the Fuel Structural Analysis to Satisfy 10 CFR 50.46(b)(4) (TAC Nos. MF4988 and MF4989)By letter dated October 2, 2014 (ADAMS Accession No. ML14276A195), Pacific Gas and Electric Company (the licensee) submitted a license amendment request 14-04 for Diablo Canyon Power Plant, Units 1 and 2, requesting an approval to perform the fuel assembly structural analyses based on a pipe break, which considers the application of leak-before-break (LBB) that allows the exclusion of the dynamic effects of certain breaks, consistent with Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Appendix A, General Design Criterion 4. Further, the licensee requests approval to use the fuel assembly structural analysis results to satisfy, in part, the emergency core cooling system performance acceptance criterion, 10 CFR 50.46(b)(4),

"coolable geometry." The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staff's acceptance review of this license 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 is 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.

The NRC staff has reviewed your application and concluded that it does provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and make an independent assessment regarding the acceptability of the proposed license amendment request in terms of regulatory requirements and the protection of public health and safety and the environment. Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staff's ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. If additional information is needed, you will be advised by separate correspondence.

If you have any questions, please contact me.

Siva P. Lingam U.S. Nuclear Regulatory Commission Project Manager (NRR/DORL/LPL4-1)

Cooper Nuclear Station Diablo Canyon Nuclear Power Plant Location: O8-D5; Mail Stop: O8-B3 Telephone: 301-415-1564; Fax: 301-415-1222 E-mail address: siva.lingam@nrc.gov Hearing Identifier: NRR_PMDA Email Number: 1829 Mail Envelope Properties (Siva.Lingam@nrc.gov20150123094200)

Subject:

Diablo Canyon, Units 1 and 2 - Acceptance Review for the Application of Leak-Before-Break in the Fuel Structural Analysis to Satisfy 10 CFR 50.46(b)(4) (TAC Nos. MF4988 and MF4989)

Sent Date: 1/23/2015 9:42:52 AM Received Date: 1/23/2015 9:42:00 AM From: Lingam, Siva Created By: Siva.Lingam@nrc.gov Recipients: "Oesterle, Eric" <Eric.Oesterle@nrc.gov> Tracking Status: None "Lyon, Fred" <Fred.Lyon@nrc.gov> Tracking Status: None "Schrader, Kenneth (KJSe@pge.com)" <KJSe@pge.com> Tracking Status: None "Soenen, Philippe R (PNS3@pge.com)" <PNS3@pge.com>

Tracking Status: None "Burkhardt, Janet" <Janet.Burkhardt@nrc.gov> Tracking Status: None "mjrm@pge.com" <mjrm@pge.com> Tracking Status: None Post Office: Files Size Date & Time MESSAGE 2485 1/23/2015 9:42:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: