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Home / SNAP / Plug-ins / RADTRAD /

RADTRAD Plug-in

The RADTRAD code can be used to estimate the containment release using either the TID-14844or NUREG -1465 source terms, and assumptions, or a user specified table. In addition, the code can account for a reduction in the quantity of radioactive material due to containment sprays, natural deposition, filters, other natural and engineered safety features. The RADTRAD code uses a combination of tables and/or numerical models of source term reduction phenomena to determine the time dependent dose at user specified locations for a given accident scenario. The code system also provides the inventory, decay chain, and dose conversion factor tables needed for the dose calculation. The RADTRAD code can be used for occupational radiation exposure assessments, typically in the control room, for site boundary dose estimates, and for dose attenuation estimates due to facility or accident sequence modification.

Change Log

Version 6.0.0 - Released 5/5/2025:

  • The RADTRAD Plugin has been updated to support the Regulatory Guide 1.183 revisions 0 and 1.
  • Added support for the Molybdenum Radionuclide group when working with a Regulatory Guide Rev. 1 model.
  • The X/Q Tables have been updated to support the option for specifying the data by Duration instead of problem time.
  • Pathway type BWR Main Steam Lines has been added.
  • Added Gap Fraction defaults specified in Regulatory Guide Revision 1 for the following accident types: Gap Release, REA-CRDA, and FHA
  • Added Regulatory Guide revision 1 release fractions default values for the DBA AST Source Scenarios.
  • Additional properties have been added to the FHA accident type in order to support analysis using regulatory guide revision 1.
  • A warning has been added when a source scenario is defined and Duration of Accident is different than expected default for the accident type.
  • Default Release Timings have been added to support Regulatory Guide revision 1 when using a DBA AST Source Scenario.
  • The REA-CRDA accident type has been updated for Regulatory Guide Rev. 1. The following properties have been added to calculate the TFGR property: Burnup and Average Fuel Rod Enthalpy. Additionally, The ability to set a User-Defined TFGR value is supported.
  • The radtrad_geo.jar was moved from the plugins directory to the lib directory, this allows integration testing to be performed on the radtrad_geo tool in the CI/CD environment.
  • Updated the incorrect I-129 inventory and gap fraction references. These references have been updated to use I-127, per the Regulatory Guide, Rev. 1 documentation
  • The REA-CRDA accident type gap fractions were updated to be 0.1 for all groups except for Alkali Metals when using the RG 1.25 or RG 1.183 Rev 0 default gap fractions.
  • An issue was resolved that caused errors exporting the GEO data to an Excel spreadsheet with formulas
  • An issue was resolved that caused compartment energy bins to not be displayed in scientific notation.
  • An issue was resolved that caused importing nuclide inventories within a .nif file to fail to import when additional properties are present.
  • The default regulatory guide revision when importing a model is now Revision 0, instead of Revision 1.
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