ML19157A283

SLRA Email Transmittal of Draft RAIs with Attachments - 5JUN2019

ML19157A283
Person / Time
Site:	Surry
Issue date:	06/05/2019
From:	Sayoc E NRC/NRR/DMLR/MRPB
To:	Aitken P, Blocher E Dominion Energy Co, Virginia Electric & Power Co (VEPCO)
Sayoc E, DMLR/MRPB, 301-287-3716
References
Download: ML19157A283 (2)

Text

From: Sayoc, Emmanuel To: Paul Aitken; Eric A Blocher Cc: Wu, Angela

Subject:

One More Draft RAI Scoping and Screening of Pressurizer Spray Head Date: Wednesday, June 05, 2019 3:47:00 PM Attachments: SS RAI 2.3.1.3 Pressurizer Spray Head.docx Importance: High Eric , Paul, Clarification Call will be scheduled unless you say we dont need it.

Thanks Emmanuel Manny Sayoc Safety Project Manager NRR/DLR 301-415-4084

RAI-2.3.1.3 Regulatory Basis:

10 CFR 54.21(a)(3) requires an applicant to demonstrate that the effects of aging for structures and components will be adequately managed so that the intended function(s) will be maintained consistent with the current licensing basis (CLB) for the period of extended operation. One of the findings that the staff must make to issue a renewed license (10 CFR 54.29(a)) is that actions have been identified and have been or will be taken with respect to managing the effects of aging during the period of extended operation on the functionality of structures and components that have been identified to require review under 10 CFR 54.21, such that there is reasonable assurance that the activities authorized by the renewed license will continue to be conducted in accordance with the current licensing basis. In order to complete its review and enable making a finding under 10 CFR 54.29(a), the staff requires additional information regarding the matters described below.

Background:

The systems, structures, and components (SSCs) that are in scope and subject to an aging management review (AMR) are those that perform an intended function as described in 10 CFR 54.4.

Issue:

In Section 2.3.1.3, Reactor Coolant, of the Subsequent License Renewal Application, the applicant stated that the pressurizer spray head does not form part of the reactor coolant pressure boundary or provide structural support of reactor coolant pressure boundary components and is therefore excluded from scope. Staff finds that this statement is not sufficient to determine if the pressurizer spray head should be excluded from scope. As noted in Table 2.3-1 of NUREG-2192, Standard Review Plan for Review of Subsequent License Renewal Applications for Nuclear Power Plants, some plants rely on the pressurizer spray for pressure control to achieve cold shutdown during certain fire events and, in addition, failure of the spray head should be evaluated in terms of any possible damage to surrounding safety grade components, therefore, this component should be evaluated on a plant-specific basis.

Request:

Staff requests that the applicant provide additional information to justify exclusion of the pressurizer spray head from the scope of AMR by specifically addressing the concerns as noted in Table 2.3-1 of NUREG-2192 as well as the specific criteria of 10 CFR 54.4 (a)(1) - (3).