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The U.S. Nuclear Regulatory Commission is in the process of rescinding or revising guidance and policies posted on this webpage in accordance with Executive Order 14151 Ending Radical and Wasteful Government DEI Programs and Preferencing, and Executive Order 14168 Defending Women From Gender Ideology Extremism and Restoring Biological Truth to the Federal Government. In the interim, any previously issued diversity, equity, inclusion, or gender-related guidance on this webpage should be considered rescinded that is inconsistent with these Executive Orders.

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Use of Computational Modeling Software - ISG-21

This Interim Staff Guidance has been issued for public comment. Comment period is now closed.

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Introduction

This interim staff guidance (ISG) provides the staff’s position on what an acceptable analysis using CMS should include, and what information should be reviewed by the staff when considering a submittal from an applicant using CMS in the design review of a storage cask or transportation package. This ISG applies to both thermal and structural analyses utilizing CMS. However, application of this ISG does not extend to shielding and criticality analyses that rely on CMS since present guidance sufficiently addresses current issues in these areas.

Page Last Reviewed/Updated Monday, July 13, 2020