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The purpose of Radiation Protection Computer Code Analysis and Maintenance program (RAMP) is to develop, maintain, improve, distribute and provide training on NRC-sponsored radiation protection and dose assessment computer codes. -
Upcoming free virtual meetings include training on and applied research for V+ and SNAP/RADTRAD. -
Gain RAMP membership and access the most current versions of RAMP codes, cooperative forums and meetings to resolve code errors and inefficiencies, and technical documents and user guides. Applying is free, and most codes are free for most users. -
If you are already a RAMP member, login here.
Codes
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Comprehensive radiation dose assessment tool designed to evaluate occupational, public, and medical exposure scenarios. -
Radiological Assessment System for Consequence Analysis for radiological emergencies. -
Confirmatory code used for various design-basis loss-of-coolant accidents. -
SIERRA is an atmospheric transport and dispersion code used for analysis in siting, licensing, and environmental reviews. It has more modules in development for source term, environmental pathways, and risk.
Meetings
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Fall 2026 and Winter 2027 RAMP User Group Meetings for V+ and SNAP/RADTRAD -
Browse the last decade+ of meetings, explore recordings of previous code training and research, and download old meeting material.
News
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Upcoming User Group Meetings for V+ and SNAP/RADTRAD. -
On August 28, 2026, NRCDose3 version 1.1.5.2 was released. The update resolves multiple coding issues in the LADTAP module, ensuring consistent and accurate dose calculations when applying both the ICRP30 and ICRP72 dose coefficient libraries. -
On August 24, 2026 RADTRAD version 5.2.1 was released. The latest RADTRAD update enhances compatibility with DG 1425 by incorporating new default gap fractions, expanded source term release fractions and timing parameters, and introducing a dedicated DG 1425 configuration option within the SNAP/RADTRAD plugin.
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NRC-RADTRAN version 1.1 was released on January 7, 2026. Additionally, RAMP is launching a public Github page for NRC-RADTRAN to house issue/feature tracking and discussions: https://github.com/NRC-RAMP/NRC-RADTRAN. Please check out the issues page for known problems, including details on a problem with how the WebTragis KML files are generated.
