ML17177A167

Acceptance Review for Byron, Unit 1, Request for Relief of Examination Interval for Reactor Pressure Vessel Head Penetration Nozzles with Peened Surfaces

ML17177A167
Person / Time
Site:	Byron
Issue date:	06/26/2017
From:	Joel Wiebe Plant Licensing Branch III
To:	Krejcie J Exelon Corp
References
Download: ML17177A167 (2)

Text

1 NRR-PMDAPEm Resource From: Wiebe, Joel Sent: Monday, June 26, 2017 10:05 AM To: Jessica Krejcie

Subject:

Acceptance Review for Byron, Unit 1, Request for Relief of Examination Interval for Reactor Pressure Vessel Head Penetration Nozzles with Peened SurfacesJessica, By letter dated June 15, 2017 (Agencywide Docum ents Access and Management System Accession No. ML17170A146), Exelon Generation Company (the licensee) requested relief from the current examination requirements of Reactor Pressure Vessel Head Penetration Nozzles performed in accordance with 10 CFR 50.55a(g)(6)(ii)(D), which specifies the use of American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI, Code Case N-729-1 "Alternative Examination Requirements for PWR Reactor Vessel Upper Heads With Nozzles Having Pressure-Retaining Partial-Penetration Welds,Section XI, Division 1." The request is applicable to Byron Station, Unit 1. 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 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 re view. 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 request 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 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.

Based on the information provided in your submittal, the NRC staff has estimated that this licensing request will take approximately 150 hours6.25 days <br />0.893 weeks <br />0.205 months <br /> to complete. The NRC staff expects to complete this review in approximately 9 months, which is March 2018. If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date or significant changes in the forecasted hours, the reasons for the changes, along with the new estimates, will be communicated during the routine interactions with the assigned project manager.

If you have any questions, please contact me at (301) 415-6606.

Joel S. Wiebe, Sr. Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Hearing Identifier: NRR_PMDA Email Number: 3580 Mail Envelope Properties (Joel.Wiebe@nrc.gov20170626100400)

Subject:

Acceptance Review for Byron, Unit 1, Request for Relief of Examination Interval for Reactor Pressure Vessel Head Penetration Nozzles with Peened Surfaces Sent Date: 6/26/2017 10:04:59 AM Received Date: 6/26/2017 10:04:00 AM From: Wiebe, Joel Created By: Joel.Wiebe@nrc.gov Recipients: "Jessica Krejcie" <Jessica.Krejcie@exeloncorp.com> Tracking Status: None

Post Office: Files Size Date & Time MESSAGE 2768 6/26/2017 10:04:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received: