ML15267A387

2015/09/24 NRR E-mail Capture - Diablo Canyon 1 and 2 - Acceptance Review of Relief Request (RR) NDE-FWNS-U1/U2, Feedwater Nozzle-to-Vessel Welds Examination (TAC Nos. MF6689 and MF6690)

ML15267A387
Person / Time
Site:	Diablo Canyon
Issue date:	09/24/2015
From:	Lingam S P Plant Licensing Branch IV
To:	Soenen P R Pacific Gas & Electric Co
References
TAC MF6689, TAC MF6690
Download: ML15267A387 (3)

Text

1NRR-PMDAPEm ResourceFrom:Lingam, SivaSent:Thursday, September 24, 2015 10:14 AMTo:Soenen, Philippe R (PNS3@pge.com)Cc:Markley, Michael; McHale, John; Stevens, Gary; Schrader, Kenneth (KJSe@pge.com); 'mjrm@pge.com'Subject:Diablo Canyon 1 and 2 - Acceptance Review of Relief Request (RR) NDE-FWNS-U1/U2, Feedwater Nozzle-to-Vessel Welds Examination (TAC Nos. MF6689 and MF6690)By letter dated September 3, 2015 (Agencywide Documents Access and Management System Accession No. ML15246A244), Pacific Gas and Electric Company (PG&E, the licensee) submitted a relief request (RR) NDE-FWNS-U1/U2 for Diablo Canyon Power Plant, Units 1 and 2 third inservice inspection interval. This relief is requested from the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, for examination coverage of Class 2 feedwater nozzle-to-vessel welds. 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 RR. 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 requested for the following clarification:

• The RR submittal requests relief under the provisions of Title 10 of the Code of Federal Regulations (10 CFR), Part 50, Section 50.55a(g)(5)(iii), "ISI program update: Notification of impractical ISI Code requirements." However, the submittal also discusses and requests approval for "proposed alternatives." Proposed alternatives are addressed under the provision of 10 CFR 50.55a(z), "Alternatives to codes and standards requirements." Clarify whether or not an alternative pursuant to 10 CFR 50.55a(z) is also being requested in this RR. During a telephone call on September 23, 2015, the licensee clarified that the relief request is solely under the provisions of 10 CFR 50.55a(g)(5)(iii), and no proposed alternatives under 10 CFR 50.55a(z) are requested.

Therefore, we will review this submittal in accordance with the provisions of 10 CFR 50.55a(g)(6), "Actions by the Commission for evaluating impractical and augmented ISI [inservice inspection] Code requirements." We will also include this clarification in our final safety evaluation. Based on the above clarification, the NRC staff has concluded that the relief request 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 RR 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 2E-mail address: siva.lingam@nrc.gov Hearing Identifier: NRR_PMDA Email Number: 2409 Mail Envelope Properties (Siva.Lingam@nrc.gov20150924101400)

Subject:

Diablo Canyon 1 and 2 - Acceptance Review of Relief Request (RR) NDE-FWNS-U1/U2, Feedwater Nozzle-to-Vessel Welds Examination (TAC Nos. MF6689 and MF6690) Sent Date: 9/24/2015 10:14:04 AM Received Date: 9/24/2015 10:14:00 AM From: Lingam, Siva Created By: Siva.Lingam@nrc.gov Recipients: "Markley, Michael" <Michael.Markley@nrc.gov> Tracking Status: None "McHale, John" <John.McHale@nrc.gov> Tracking Status: None "Stevens, Gary" <Gary.Stevens@nrc.gov>

Tracking Status: None "Schrader, Kenneth (KJSe@pge.com)" <KJSe@pge.com> Tracking Status: None

"'mjrm@pge.com'" <mjrm@pge.com> Tracking Status: None "Soenen, Philippe R (PNS3@pge.com)" <PNS3@pge.com>

Tracking Status: None Post Office: Files Size Date & Time MESSAGE 3337 9/24/2015 10:14:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: