Document: NRC Regulatory Guide
Document ID: aa450282-f5b0-4dd2-b41a-917a7491deb2
Document Type: regulatory_guide
Title: Preparing Probabilistic Fracture Mechanics (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2133/ML21334A158.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.245
CFR Part: 
CFR Title: 

Content:
Each model should be assessed independently and categorized as shown in Table C-3. The applicant should follow the submittal guidelines in Table C-3 for each model in the PFM software and/or analysis, based on the model category. RG 1.245 Revision 0, Page 15 Table C-3: Submittal Guidelines for Models Category Description Submittal Guidelines M-1 Model from a code in category QV-1A within the same validated range • Reference existing documentation for that model in the NRC-approved code, demonstrate that the current range of the model is within the previously approved and validated range, and demonstrate that the model functions as intended in the new software. M-2 Model from a code in category QV- 1B outside the validated range • See the submittal guidelines for M-1, except demonstrate validity of the model for the new applicability range (document a comparison of model predictions for the entire new range to applicable supporting data, predictions made using alternative models, and/or using engineering judgment, optionally supported by quantitative goodness-of-fit analyses). M-3 Model derived from a category M-1 or M-2 model • See the submittal guidelines for M-2 and include a detailed description of changes to the M-1 or M-2 model, with justification for the validity of the new model. M-4 Well-established model not previously part of an NRC-approved code • Provide justification for model as being well-established by supporting references and engineering judgement. • Describe gaps and limitations in the code capabilities for the analysis, combined with a strategy for mitigating identified gaps and communicating any remaining issues or risks. • Describe the model(s) applied in the PFM analysis code in sufficient detail so a competent analyst familiar with the relevant subject area could independently implement the model(s) from the documentation alone. Model forms can either be theoretical, semiempirical, or empirical. • Establish a basis for all