ML21217A251
| ML21217A251 | |
| Person / Time | |
|---|---|
| Issue date: | 08/09/2021 |
| From: | David Dijamco Office of Nuclear Reactor Regulation |
| To: | |
| Hiser A | |
| Shared Package | |
| ML21217A247 | List: |
| References | |
| Download: ML21217A251 (7) | |
Text
FAVOR Code Update NRC-Industry Materials Information Exchange Public Meeting August 10, 2021 David Dijamco Office of Nuclear Reactor Regulation Vessels and Internals Branch
From last years update Findings from V&V assessment of FAVOR (TLR-RES/DE/CIB-2020-02, ML20017A170) 1 Absence of SQA Plan o Draft SQA Plan created, under RES review and revisions 2 Absence of Change Control and Documentation o Action to close: implement change control procedures in SQA plan o GitHub repository created and FAVOR source put under version control in NRCs cloud environment (non-public) 3 Absence of Software Configuration Management o Plans to create and implement Configuration Management And Maintenance Plan (CMMP) 4 Absence of FAVOR Baseline o Plans to create and run test suite, document results as baseline 5 Key Capability Deficiency: As-Found Flaw Modeling o As-found flaw FAVOR code nearly completed and V&V testing mostly completed, documentation still underway NRC-Industry Materials Information Exchange Public Meeting - August 2021 2
FAVOR Version 20.1.12 Added capability to analyze as-found flaws; backwards compatible with version 16.1
- Users guide (ML21175A301) o Added Appendix C
- Theory manual (ML21175A300) o Added Section 2.1 o Added Appendix H
- How to get the code (from the NRC public website):
https://www.nrc.gov/about-nrc/regulatory/research/obtainingcodes.html Distribution of FAVOR is handled by the NRC staff. Requestors will need to fill out, sign, and return this non-disclosure agreement. When complete, it may be mailed to the address listed on the form or sent to safetycodes@nrc.gov. The code is provided at no cost; however, no technical assistance is provided.
NRC-Industry Materials Information Exchange Public Meeting - August 2021 3
As-found FAVOR v20.1.12 file
- Prompted by IPFLAW parameter set equal to 4 (uses only a single flaw file instead of three)
- Details are in Appendix C of the users guide and Appendix H of the theory manual NRC-Industry Materials Information Exchange Public Meeting - August 2021 4
FAVOR Version 20.1.12 Summary of verification and validation for as-found flaw capability
- As-found flaw data are correctly read in
- Input data accurately processed to calculate other variables (axial/hoop stresses, RTNDT, temperature at crack tip, etc.)
- Input data are within acceptable ranges
- Details in H.5 and H.6 in Appendix H of theory manual NRC-Industry Materials Information Exchange Public Meeting - August 2021 5
FAVOR software quality assurance
- Software quality assurance plan (ML21180A161)
- Configuration management and maintenance plan (ML21180A167)
- Software requirements document is underway.
- Continuous integration testing implemented: every time a change is made, tests are automatically performed, and test documentation is automatically generated.
NRC-Industry Materials Information Exchange Public Meeting - August 2021 6
FAVOR development still going Further enhancements to FAVOR are underway such as input generator, modularization, explicit typing, conversion to free-form source, continuous integration testing.
Regulatory applications of FAVOR:
- Used in the probabilistic fracture mechanics NRC acceptance of 10 CFR 50.55a(z)(1) alternative requests for BWR reactor pressure vessel circumferential welds
- Used in the technical basis for alternative pressurized thermal shock rule (10 CFR 50.61a)
NRC-Industry Materials Information Exchange Public Meeting - August 2021 7