Requesting SNAP from the NRC

Creation date: 6/11/2025 1:03 PM    Updated: 6/11/2025 1:03 PM

Obtaining SNAP

SNAP is maintained by Information Systems Laboratories (ISL).

SNAP is based on a plug-in architecture. Support for each of the analysis codes, TRACE, MELCOR, RELAP5, etc.., is provided in separate self-contained plug-ins.

In general, the NRC allows distribution of its reactor safety codes and tools to domestic organizations (utilities, vendors, academic institutions, commercial enterprises) and international organizations located in countries that participate in the Code Applications and Maintenance Program (CAMP), the Cooperative Severe Accident Research Program (CSARP) or the Radiation Protection Computer Code Analysis and Maintenance Program (RAMP).

If you have not already done so, create an account on the SNAP website for the “point of contact” for your organization . The “point of contact” must be the same person identified in the non-disclosure agreement. If multiple points of contact are desired, please make sure they are also listed on the signed copy of the non­disclosure agreement.

Access to the following NRC funded code plug-ins requires submitting a signed SNAP non-disclosure agreement to:

U.S. Nuclear Regulatory Commission
Office of Nuclear Regulatory Research Code
Reactor Analysis Branch
ATTN: Branch Chief
M/S 10-B58

Washington, DC 20555

Analysis CodesPlug-inProgram
CONTAINCONTAINCAMP
FRAPCON, FRAPTRAN, FASTFRAPCAMP
MELGEN/MELCORMELCOR2XCSARP
PARCSPARCSCAMP
RADTRADRADTRADRAMP
SCALESCALECAMP
TRACETRACECAMP

If you have any questions regarding access to the NRC plug-ins, please contact:

Chester Gingrich
USNRC SNAP Project Manager
email: CGG@nrc.gov
voice: 1-301-415-2173

The following code plug-in is available to CAMP members under the CAMP SNAP User's Group (CAMP-SUG) agreement. CAMP members interested in using this plug-in must complete and send a signed copy of the CAMP-SUG agreement to sug‑support@islinc.com.

Analysis CodesPlug-inProgram
RELAP5-MOD3RELAP5cCAMP-SUG

The following code plug-ins are available to SNAP User's Group (SUG) members.
Please contact sug-support@islinc.com for information of joining the SNAP User's group.

Analysis CodesPlug-inAccess
GOTHICGOTHICSUG
RELAP5-MOD3, RELAP5-3DRELAP5-3DSUG
RETRAN-3DRETRAN-3DSUG

You can download the code directly from this site after you have registered an account and submitted any required signed agreements.