Recent News
SNAP Version 4.1.4 Released
August 10, 2023
AptPlot 8.0.3 Updated
May 22, 2023
PyPost 4.0.3 Released
August 18, 2022

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.

Important Notice Concerning Log4J Vulnerability (CVE-2021-44228): The Log4j utility is included in earlier versions of AptPlot and SNAP. We recommend that you promptly delete any earlier versions of AptPlot or SNAP that you may have installed and update to the latest version of this software. AptPlot Version 8.0 which is now included as a plug-in to SNAP Version 4.0.1 was released in October 2021.  These versions of AptPlot and SNAP do not include the Log4J utility. 

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 4.1.4 - Released 8/09/2023:

  • The default Navigator was updated to expand and select a recently added component in all cases
  • The ASCII viewer has been updated to refresh automatically when a numeric variable referenced by the component is modified.
  • An issue has been resolved where storing a condition set may replace or modify an existing condition set
  • The Review Properties dialog was updated to load the Component Type combo box and filter the results when the dialog opens.
  • Fixed a bug when creating a new connection in the drawn view to connect to the center of an inlet connection point.
  • The expanded entries list for parametric job streams was updated to sort the Name column correctly.
  • An update has been added to prevent floating the primary toolbars of the Model Editor.
  • The standard component selection editor has been updated to allow filtering the displayed components by category.

see older releases