GADRAS Version 19.6.5 Release Notes

BUG FIXES

PLOT

• Users were unable to plot files from outside the current detector folder
• Users could not plot computed source without .rtd file
• Updating a source line would reset a user-defined distance/height
• The “spectrum preview” window on the PCF viewer did not always appear correctly

ISOTOPEID

• When excluding nuclides from the results page, IsotopeID would always recompute the template database
• The names of excluded nuclides did not appear correctly on the results page

INJECT

• Selecting sources using "D" and "S" buttons would sometimes throw exception
• 3D viewer would throw exception for point sources

REGRESSION

• Constraints specifications would sometimes throw exception for valid input

MODEL

• Users could not update some attributes on the model page for non-spherical objects

CUSTOM PEAK FIT

• Peak fits would sometimes throw exception during normal usage

DETECTOR

• Advanced characterization setup would throw exception when opening the input form

GADRAS Version 19.6.4 Release Notes

NEW FEATURES

Collimator Scattering (Beta): Scatter that occurs from photons interacting with the inside of a collimator are now calculated explicitly for appropriate simulation scenarios. The feature is currently undergoing verification and validation, but users can experiment with the new feature by adding a file named “IncludeCollimatorScatter.gadras” in the current detector folder.

Streaming Pathways: Streaming pathways are now explicitly searched for and incorporated into 3D meshing routines. The feature is currently undergoing verification and validation, but users can experiment with the new feature by adding a file named “FindStreamingPaths.gadras” in the current detector folder.

Modeling TRISO Fuel: Users can specify heterogenous materials for use in model generation. By checking the TRISO checkbox (see figure below), users can choose a model to be randomly dispersed throughout the material. Users can also specify either a % packing factor or total number of particles to put in the shell.

Uranium and Plutonium Isotopics:

• The peak-based analysis methods used for isotopics now have a separate form that automatically updates the isotopic results form and opens at the same time. From this form, users can customize the peak fits where the table is highlighted to display which peaks were customized, view the peak fits to decide which peaks to customize, and select whether to use the peaks for DAA/RE via checkboxes.
• Users can also update the peak threshold while retaining their customized peak areas. These changes do not apply to plutonium isotopics, which does not allow peak-based analysis routines.
• The peak area customization form plot now can plot various scales (multiple log cycles, linear, log). Additionally, a track bar for material density was added to the DAA settings that will update the DAA estimate and plot in real-time.
• Updates were also made to the uncertainty calculations for the isotopic results and the continuum fitting routine for the custom peak fitting capability.

Model Fitting - Peak Only: FSA Model Fit has now been renamed to Model Fit since users can choose to only use peaks. The same peak form mentioned above for isotopics is now available for model fit with the same capabilities (users can customize peaks, the customized peaks in the table are highlighted, etc.). Users now have the option of uploading peak fits from PeakEasy for model fitting as well. For model fitting, users can upload multiple spectra and the customization for each set will be maintained.

Aerial DRF Improvements: The Aerial DRF tool has been updated with more characterization data and improvements to the ground scattering routines. A new version of the RSL AMS has been added to Detector\Search\Beta-Feature\Aerial-Scatter_Environment\AMS-2024.

Inject Speed Up: After generating a spectrum using a 3D model, subsequent generations of the model will occur much faster. This is due to the generation of a “.meshoutput” file that contains the radiation interacting with the detector and metadata indicating the orientation of the model and the detector. If the model is updated or reoriented, the full 3D transport will be triggered and a new .meshoutput file will be created. Users can copy these .meshoutput files to different detector folders to reuse the radiation profile with a different detector response function. The mesh optimization routine also uses multiple threads to generate the optimal mesh for multiple energy groups simultaneously.

Detector Characterization Speed Up: The efficiency of DRF parameter optimizations has been increased by utilizing parallel processing. If a characterization source contains translations (e.g. dx / dy values), the equivalent point source at the center of the detector is created and used for subsequent iterations of the optimization routine. This results in much faster characterization times with minimal impact to the final DRF. The speedup is most apparent for PVT detector systems where characterization sources are often located at the center of the portal lane rather than the center of the detector element.

Model Page Updates: Modeling tools have been added that allow users to see various properties of their 3D models. These properties include material characteristics (e.g. total mass of a material across all objects in a 3DM) as well as model characteristics (e.g. volume of individual models after incorporating displacement by overlapping models, and X, Y, Z extents of the whole 3DM). These properties can be viewed by selecting 3DM -> View Model Summaries… and 3DM -> View Material Summaries… from the Model page.

DETECTOR CHARACTERIZATION UPDATES

• RSIRap - Now contains folders for the Rap Truck and the RSI 2 Gamma log system.
• STL detector named "Harley" has an update.
• RSL's AMS system has been updated.
• LDS, from JHU/APL has been added to the Search detector directory.
• A Raysid DRF has been added to Detector\Handheld\Raysid.
• A DRF has been added to Detector\Handheld\RadEye_SPRD-GN_CYLC.

BUG FIXES

• DECAY DATABASE: Some nuclide decays have been corrected.
• CUSTOM DOSE TOOL: The custom dose tool did not calculate different units correctly.
• IN SITU BATCH INJECT: Issues causing the in situ batch inject tool to not output correct results have been fixed.
• PCF VIEWER OPERATIONS WITH LARGE FILES: The PCF viewer would lag for simple operations when large files were being manipulated.
• BACKGROUND SUPPRESSION: Models with rotations did not produce correct background suppression results.
• 3D COMPUTATIONS FOR RADIONUCLIDES: The distributed files and documentation for GadPy have been updated for easier usage.
• INVERSE MODELING NON-SPHERES: Fitting extents of non-spherical models would sometimes produce erroneous results.
• CHARACTERISTICGAMMAS.TXT NOT BEING READ: CharacteristicGammas.txt was not being read and IsotopeID was relying on default list of characteristic gammas.

GADRAS VERSION 19.5.2 RELEASE NOTES

IMPORTANT NOTE REGARDING WINDOWS 7

Windows 7 does not come with the .NET 4.6 framework by default that GADRAS v19 requires. It can be installed by an administrator. However, for standalone machines without internet access this may prove difficult. If you cannot install .NET 4.6 we recommend using v18.

BUG FIXES

INJECT

• Some 3D transport runs did not handle rotations correctly

PHOTOPEAK LIST FORM BEST FIT

• The best fit of a peak to a measured spectrum would sometimes cause GADRAS to crash

PLOT

• The computed source table would sometimes not retain previously plotted sources between sessions

USER EXPERIENCE ENHANCEMENTS

DETECTOR PARAMETER TRAINING TOOL

• When the detector parameter training tool gets launched, the characterization SpecPairs are saved to the detector's Cal.dat file so they can be retrieved when GADRAS is launched again. Cal.dat used to be updated only when the Fit button was clicked on the Detector tab.

PCF VIEWER

• All PCF Viewers get closed when a user changed detectors
• Error checking has been disabled as this caused very long wait times for large files

TIME HISTORY

• Users can now choose whether records labeled "Background" should be included in the time history plot

PLOT TAB

• The computed source table is now easier to edit

USER MANUAL

• The user manual has been updated with new features and more comprehensive descriptions

KNOWN ISSUES

MODEL FITTING WITH NESTED 3DM FILES

Users cannot use the inverse model fitting routine with 3dm files that contain other 3dm files. To get around this, users should generate 3dm files that only contain 1dm files.

GADRAS VERSION 19.3.5 RELEASE NOTES

IMPORTANT NOTE REGARDING WINDOWS 7

Windows 7 does not come with the .NET 4.6 framework by default that GADRAS v19 requires. It can be installed by an administrator. However, for standalone machines without internet access this may prove difficult. If you cannot install .NET 4.6 we recommend using v18.

NEW FEATURES

USER DEFINED TIMEOUT PERIOD FOR TRANSPORT

Users can specify how long transport runs take before timing out. This can be specified via the Model -> Edit -> Transport Settings menu option.

BUG FIXES

COMPUTED SPECTRUM

• If beta or neutron contributions to the spectrum were significant, the true coincidence summing algorithm produced erroneous results
• Bremsstrahlung sources would not apply user-specified shielding

ANALYSIS

• Uncertainties in Single Regression results were sometimes displayed in the incorrect units

MODEL

• Trace sources would sometimes not retain user provided specifications when clicking Edit
• Users were not able to change the Age of an interval

INJECT

• Detector Defaults button sometimes didn’t work correctly

ENERGY CALIBRATION

• Deviation pair editor would throw an error
• Deviation pair graphical adjustments did not work

NEUTRON

• The Feynman-Y graph did not show axis units