Document: NUREG-0800
Document ID: 2bca792d-0e88-4e2d-b437-be572ed57a48
Document Type: srp
Title: REVIEW OF TRANSIENT AND ACCIDENT ANALYSIS METHODS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0708/ML070820123.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.0.2
CFR Part: 
CFR Title: 

Content:
ze the amount of work required for plant- and event-specific reviews. A certain amount of generic assessment may be performed for such a code as part of the generic code development. Applying portions of the review process to a general purpose transient analysis computer program is required to determine its suitability for use as the basis for an evaluation model. The review process for the general purpose transient analysis computer program, may indicate that the code models and generic assessment do not include all the appropriate geometry, phenomena, or the necessary range of variables to demonstrate code adequacy for some of the intended plant-specific event analyses. In order to avoid problems in the review, it is important that the submitted code documentation identify the intended range of applicability of the generic code, including its models and correlations. The “generic” assessment that accompanies the code must support the intended range of applicability of the code. The reviewer must ensure that the code models and assessment support the use of the code over its stated range of applicability. One goal of the review should be that evaluation models that use an approved general purpose transient analysis computer program can efficiently identify the models and assessment that support the analysis of the specific plant and accident types that the evaluation model will be used for in order to streamline future reviews of the evaluation models. 5. Review of Small Changes to Existing Evaluation Models. Application of the full review process described in this SRP section may not be needed for all evaluation models submitted for review by the staff. Some evaluation models submitted for review are relatively minor modifications to existing evaluation models. The scope and depth of applying the review process to the evaluation model can be based on a graded approach. The following attributes of the evaluation model should be considered when determining the