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 6.0.1 - Released 8/20/2025:

• An issue was resolved that caused the PWR Rev 1 default early release fraction to be 0.3 instead of 0.03.
• An issue was resolved that caused problems converting X/Q table values automatically when changing the X/Q Time Option.
• Minor typos in the X/Q component help text were resolved.
• The Source Component FHA accident type was updated to support/display the correct units when performing analysis with British units.
• The FHA accident type was updated to set the adjusted inventory to 0.0 for all elements that are not noble gases or iodine.
• An issue was resolved that caused the default Release Fractions and Timings for the default rev 1 options to be displayed incorrectly.
• The "BWR Main Steam Lines" pathway type has been added to the Pathway completion dialog when the New menu item is clicked.
• An issue was resolved that caused the REA-CRDA Source components to report an error about Burnup and Enthalpy values not being set when the properties are not enabled/exported.
• A bug was resolved that caused the model to not have the expected radionuclide groups, causing errors modifying the source scenarios properties.
• The Gamma Energy Output tool was updated to bin isotopes by energy sort by isotope energy instead of isotope relative intensity
• The Gamma Energy Output tool and the RADTRAD Job step have been updated to support specifying the energy types that should be included in the generated spreadsheet. the avaiblae energy types include: Gamma, X-Ray, and Annihilation Quanta.
• The X/Q Time Option property on the X/Q Tables category node has been updated to not be optional. This property will always be included for a Reg. Guide Rev. 1 analysis.
• The Pool Iodine DF property for the FHA source accident type has been updated to report a warning if the value is greater than 200.0 when performing analysis with Reg. Guide Rev. 0 and when the value is greater than 667.0 when performing analysis with Reg. Guide Rev. 1.
• The Pool Iodine DF value has been updated to not affect the calculated Br values within the Source Scenario Source Term tab.
• The Iodine calculated adjusted inventory was updated to only apply the Pool Iodine DF to the fraction of elemental iodine.
• The X/Q default time option is set to use Time instead of Duration, regardless of the model Regulatory Guide revision selection.
• A user prompt has been added to determine if the X/Q tables should be updated automatically when the X/Q Time Option is modified.
• A model warning has been added to the Source component when the model is set to Reg. Guide Rev. 0 analysis but the user has selected a Rev. 1 release fractions default file.
• The Gamma Energy Output (GEO) tool has been updated to support ICRP-107. A property for choosing the ICRP file has been added to the RADTRAD job step and the standalone GEO application now has a drop-down list that can be used to select the ICRP file used for analysis. This property defaults to use ICRP-38.
• An error warning was removed when the Pin Pressure is not used for an FHA accident source scenario.
• The help text for the FHA accident source scenario 'Pool Iodine DF' property was updated.
• The Source Component has been updated to support non-DBA analysis by including the default release timings for NUREG-1465 and now supports the ability to modify the ex-vessel and late timings.
• An issue was resolved that caused the Source Scenario Source Term tab to display incorrect values for the molybdenum nuclides with Regulatory Guide Revision 1.
• An issue was resolved that caused the RADTRAD 3.0.3 imported models to only set the Source iodine fractions on the first source. Now, all of the sources are set to the same iodine fractions imported.
• An update to the RADTRAD 3.X.X import functionality has been added to update the inventory based on the imported source term fraction and then set the source term fraction to 1.0.
• The FHA source scenario was updated to support any value for the Pool Iodine DF property. A warning is reported if the value is greater than 667.
• An issue was resolved that caused additional nuclides to be exported to the .icx inventory file when multiple inventories exist in the model
• An issue was resolved for importing a generic pathway for RADTRAD 3.03.
• An issue was resolved that caused the GEO tool to calculate the probabilities for compartment bins incorrectly.
• The ability to set the default source release fractions is now available within the Source Scenarios Release Fractions and Timings tab
• Added an alert when the user imports a Regulatory Guide, Revision 1 model and doesn't specify the revision within the input file.
• Added an error message when the regulatory guide revision property has an invalid value.
• Fixed bug importing the default source release definitions