ML18166A340
| 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: |
| References | |
| DG-1327 | |
| Download: ML18166A340 (11) | |
Text
T. W. Eichenberg EPRI Fuel Reliability Program, Reg-TAC Chair Sr. Specialist Reactor Safety Analysis, TVA July 17, 2018 DG-1327 Public Comment Disposition
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Issue Overview
- Dose
- Comment Resolution
- Forward Fit
- Work Scope
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)
© 2018 NEI. All rights reserved.
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