Recent News
SNAP Version 2.6.6 Released
November 7, 2018
AptPlot 6.8.0 Updated
February 19, 2018
PyPost 1.3.3 Released
February 19, 2018

Symbolic Nuclear Analysis Package

The Symbolic Nuclear Analysis Package (SNAP) consists of a suite of integrated applications designed to simplify the process of performing engineering analysis. SNAP is built on the Common Application Framework for Engineering Analysis (CAFEAN) which provides a highly flexible framework for creating and editing input for engineering analysis codes as well as extensive functionality for submitting, monitoring, and interacting with the codes.

Download SNAP

Getting Started

A guide to downloading and installing SNAP and its prerequisite software.


Users' manuals, on-line instruction, tutorials, and other SNAP related materials.

SNAP Plug-ins

Find information about the various SNAP plug-ins available to users.

Technical Support

Technical support is available to CAMP members, NRC contractors and SNAP User's Group members.

Change Log

SNAP 2.6.6 - Released 11/7/2018

  • The numeric input file (NIF) format has been updated to include a file header block. The file header includes the SNAP version, the exporting model plug-in version, and the engineering unit set in the model where the file was exported. The set of engineering units in the NIF file will be used when importing the values into floating point variables.
  • A warning will be reported when importing a NIF file with a different plug-in source than the target model.
  • An issue has been resolved importing legacy NIF files into British models that would prevent non-interactive variables from being converted to British units.
  • The file selection dialog for NIF import and export initialize to the users home directory correctly if no NIF file has been imported or exported before.

see older releases