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SNAP Version 2.6.1 Released
February 28, 2018
AptPlot 6.8.0 Updated
February 19, 2018
PyPost 1.3.3 Released
February 19, 2018

TRACE Plug-in

The TRAC/RELAP Advanced Computational Engine (TRACE) code is the latest in a series of advanced, best-estimate reactor systems codes developed by the U.S. Nuclear Regulatory Commission for analyzing transient and steady-state neutronic-thermal-hydraulic behavior in light water reactors. It is the product of a long term effort to combine the capabilities of the NRC’s four main systems codes (TRAC-P, TRAC-B, RELAP5 and RAMONA) into one modernized computational tool.

The TRACE plug-in requires installation of the PARCS plug-in. Please note that the PARCS plug-in will automatically be selected for installation with the TRACE plug-in if you choose to install SNAP directly from the web site. If you download the installation packages to a folder for later installation, the TRACE plug-in will not be available for installation unless you include the PARCS plug-in in your download.

The TRACE Plug-in User's Manual provides instructions for working with TRACE models in SNAP. This Manual is also available as a searchable help set in SNAP.

Change Log

Version 3.9.3 - Released 8/16/2018:

  • The initial temperature, burn-up and fuel properties dialogs for the CANCHAN component have been updated to allow simple spreadsheet-like copy/paste behaviors.
  • A new Integration Case component has been added to the SNAP core and enabled for the TRACE plug-in. The Integration Case component represents a pre-defined set of sub-system integrations performed in the specified order. The set of integrations will be performed when the case is graphically edited (much like restart cases) and when the case is exported to a local file.
  • An issue was resolved in the TRACE sub-system integration process that prevented isolated Fills and Breaks from being reconnected to other hydraulic components.
  • The Import Case behavior for TRACE restart cases has been updated to resolve an error where unchecking the "Preserve Existing" checkbox would cause unpredictable behavior.
  • The TPR binary comparison application has been updated to resolve an issue where vessel SD blocks were identified as having differences when they were equivalent.