ML18166A340

DG-1327 Enclosure 3 - Public Meeting NEI Presentation

ML18166A340
Person / Time
Site:	Nuclear Energy Institute
Issue date:	07/17/2018
From:	Eichenberg T Nuclear Energy Institute
To:	NRC/RES/DE
O'Donnell E
Shared Package
ML18115A073	List: ML18166A340 ML18166A341 ML18166A342 ML18166A343
References
DG-1327
Download: ML18166A340 (11)

Text

DG-1327 Public Comment Disposition T. W. Eichenberg EPRI Fuel Reliability Program, Reg-TAC Chair Sr. Specialist Reactor Safety Analysis, TVA July 17, 2018

Issue Overview

• Dose

• Comment Resolution

• Forward Fit

• Work Scope

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Dose Assessment

• Changes to Non-LOCA Dose Assessment - Not Appropriate to DG-1327 Fission Product Release Fraction in DG-1327 should only be applicable to CRE/CRDA Revise other regulatory guidance as appropriate, such as RG 1.183 or 1.195

• Changes to AST Governed by 10CFR50.67(b)

New CRE/CRDA calculation creates 10CFR50.67 potential AST issues

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Comment Resolution

• Section C.1.2 Comment C Comment D Prompt vs. 5% power threshold issue.

What does at power limits becomes questionable mean?

• Section C.1.3 Comment C Dismissing the transition temperature phenomenon (PWR vs BWR)

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Comment Resolution

• Section C.2.1.1 Comment A Test are Inherently Conservative; not representative of actual operation. Recent changes to curve fits of Figures 2 & 4 in DG-1327 adds conservatism at lower Hydrogen levels. Revised technical basis for DG-1327 is missing.

Comment B Is Non-LOCA Realistic/Best Estimate Allowed or Not?

• Section C.2.2.3 Comment A-F Additional Workshop to flesh out Work Scope

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Comment Resolution

• Section C.2.3.4 Comment C How can we reference a Draft Reg. Guide 1.224

• Section C.2.3.5 Comment B Hydride reorientation, imposing beyond existing analyses

• Section 3.1 Comment C, E Additional Workshop to flesh out Work Scope

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Comment Resolution

• Section 3.2 Comment F, H-K Mechanical Properties vs. In-Pile

• Section 3.3 Comment A-B Fuel cladding failure is conservatively presumed.

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Dose Assessment

• Page 53 comment table Comment F, H-K No Response Provided

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Forward Fit / Implementation

• When Should Forward Fit Be Applied?

Possible Areas - When 50.59 indicates an LAR in needed, and touches:

• NUREG-800, SRP-4.2 (Fuel System Design) (Sans PAD5 related stuff)

• NUREG-800, SRP-15.4.8, (Spectrum of Rod Ejection Accidents (PWR))

• NUREG-800, SRP-15.4.8.A, (Radiological Consequences of Rod Ejection Accident (PWR))

• NUREG-800, SRP-15.4.9, (Spectrum of Rod Drop Accidents (BWR))

• NUREG-800, SRP-15.4.9.A, (Radiological Consequence of Rod Drop Accident (BWR))

• Reg. Guide 1.183; 1.195

• Example LAR Fuel Transition with a Specific Change of Methodology (i.e., 3D methods)

• Availability of Approved Methods Not every vendor in the same position right now

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Work Scope

• Additional Public Workshop to Discuss Scope Everyone on the same page

© 2018 NEI. All rights reserved.

Questions?? / Discussion