ML15091A334

NRR E-mail Capture - Diablo Canyon 1 and 2 - License Amendment Request 15-01, Incorporation Into Licensing Basis of Pressurizer Filling Analysis for Major Rupture of a Main Feedwater Pipe Accident

ML15091A334
Person / Time
Site:	Diablo Canyon
Issue date:	04/01/2015
From:	Siva Lingam Plant Licensing Branch IV
To:	Richardson M Pacific Gas & Electric Co
References
TAC MF5785, TAC MF5786
Download: ML15091A334 (2)

Text

NRR-PMDAPEm Resource From: Lingam, Siva Sent: Wednesday, April 01, 2015 10:00 AM To: mjrm@pge.com Cc: Markley, Michael; Lyon, Fred; Lapinsky, George; Montecalvo, Michael; Beaton, Robert; Sweat, Tarico; Grover, Ravinder; Burkhardt, Janet; Schrader, Kenneth (KJSe@pge.com);

Soenen, Philippe R (PNS3@pge.com)

Subject:

Diablo Canyon 1 and 2 - License Amendment Request 15-01, Incorporation into Licensing Basis of Pressurizer Filling Analysis for Major Rupture of a Main Feedwater Pipe Accident (TAC Nos. MF5785 and MF5786)

By letter dated February 25, 2015 (ADAMS Accession No. ML15056A773), Pacific Gas and Electric Company (PG&E, the licensee) submitted a license amendment request 15-01 for Diablo Canyon Power Plant (DCPP),

Units 1 and 2, requesting an approval to incorporate into the licensing basis an analysis of pressurizer filling concerns associated with the main feedwater pipe rupture accident summarized in DCPP Updated Final Safety Analysis Report Section 15.4.2.2. This amendment involves the addition of time critical operator actions and modifications of the PG&E Design Class I backup nitrogen accumulators, which are credited in the new pressurizer filling analysis. The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs 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 staffs 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 1

Hearing Identifier: NRR_PMDA Email Number: 1963 Mail Envelope Properties (Siva.Lingam@nrc.gov20150401100000)

Subject:

Diablo Canyon 1 and 2 - License Amendment Request 15-01, Incorporation into Licensing Basis of Pressurizer Filling Analysis for Major Rupture of a Main Feedwater Pipe Accident (TAC Nos. MF5785 and MF5786)

Sent Date: 4/1/2015 10:00:08 AM Received Date: 4/1/2015 10:00:00 AM From: Lingam, Siva Created By: Siva.Lingam@nrc.gov Recipients:

"Markley, Michael" <Michael.Markley@nrc.gov>

Tracking Status: None "Lyon, Fred" <Fred.Lyon@nrc.gov>

Tracking Status: None "Lapinsky, George" <George.Lapinsky@nrc.gov>

Tracking Status: None "Montecalvo, Michael" <Michael.Montecalvo@nrc.gov>

Tracking Status: None "Beaton, Robert" <Robert.Beaton@nrc.gov>

Tracking Status: None "Sweat, Tarico" <Tarico.Sweat@nrc.gov>

Tracking Status: None "Grover, Ravinder" <Ravinder.Grover@nrc.gov>

Tracking Status: None "Burkhardt, Janet" <Janet.Burkhardt@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 "mjrm@pge.com" <mjrm@pge.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 2380 4/1/2015 10:00:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: