Patch Notes For NRC-RADTRAN Version 1.1
These patch notes address actions performed by Pacific Northwest National Laboratory related to the update from NRC-RADTRAN Version 1 to NRC-RADTRAN Version 1.1 as directed by the Nuclear Regulatory Commission. In this version, updates have been implemented for both the graphic user interface (GUI) and underlying FORTRAN code. The GUI has been updated to Version 1.1 and the FORTRAN application has been updated to Version 6.3, collectively these are considered NRC-RADTRAN Version 1.1.
Installation Notes:
Prior to installation of Version 1.1, uninstall any previous versions of RADTRAN or NRC-RADTRAN. To install the file, double click on the MSI installer and follow the prompts for installation.
Two In-Use Test Cases have been supplied as part of this update and installation package; a highway use case and rail use case.  These test cases contain input files, the required routing files, and copies of the generated input echo and output files.  The input and outputs can also be found in the Verification and Validation Report associated with this update.
The additional files included with NRC-RADTRAN Version 1.1 installation package are:
-	Highway Test Case Input.INPUT
-	Highway Test Case Output.OUTPUT
-	Region_i_to_iv(highway).kml
-	Rail Test Case Input.INPUT
-	Rail Test Case Output.OUTPUT
-	Region_i_to_iv(rail).kml
-	Blank Highway Import CSV.csv (use described below)
-	Blank Rail Import CSV.csv (use described below)
Change Notes: 
- The methodology for neutron dose calculations has been redefined. In previous RADTRAN versions, neutrons were calculated using methods that matched or were very similar to gamma calculations. This has been updated to calculate neutron doses using the Bessel Functions defined in the code. The calculations now correctly use Mu, A1, A2, A3, and A4 values to calculate neutron dose. This change also impacted how gamma calculations were performed. Gamma calculations require definition of Mu, and 0.0081 was chosen as value of Mu used in the MEI in transit dose calculations. These changes should correct the dose calculations to perform as described in the RADTRAN-4 and RADTRAN-6 Technical Manuals.
- The summarization calculations during kml file import were updated. Previous calculations overestimated the population density of links when summarized into a rural, suburban, and urban link by state. The was caused by an incorrect summation added to the calculations. This summation has been corrected. In addition, the code was misinterpreting links with zero distance resulting in calculational errors for speed and time resulting in zeros being reported incorrectly. The code has been updated to ignore this type of link and now correctly populates all fields during kml file summarization.
- Due to the WebTRAGIS import issue, additional methodologies for import of links were implemented. This has been completed by allowing data input from of a .csv file from DOE-START or a user generated .csv file. Use of either data input method will provide similar results as using a WebTRAGIS .kml file. Additionally, this allows users to upload data without requiring a .kml file. Two .csv files templates, one for highway routing and one for rail routing, have been provided as part of the installation files (see file list above).  To use these file templates, clear the example data and add user defined data. Do not change the headers or it will fail to upload correctly into NRC-RADTRAN Version 1.1. Some columns do not require data and have been marked as “Unneeded”; these columns need to stay in the file but users do not need to add data to these fields. User’s may add data to these columns, but it will not impact the link summarization in NRC-RADTRAN Version 1.1.
- Population risk was previously provided by individual segment link, requiring users to manually sum this data from the output file; this has been addressed by adding a summation to the output file.
- Previous versions of NRC-RADTRAN displayed values of -1 for default parameters which users would need to interpret by consulting the guidance documents. NRC-RADTRAN Version 1.1. now displays the default values listed in the RADTRAN User's Manual rather than a field code of -1 which required interpretation. Note, changing these parameters in the software and saving the will overwrite the default input file and permanently change them, so update these values with caution.  
- Additional transportation modes have been made available in the drop-down menu of the Vehicles Tab. These have always been part of the original RADTRAN code, though only accessible through workarounds and not through the GUI.  Detailed descriptions of the calculations related to these transport modes are available in the RADTRAN-4 Technical Manual. For clarity, “waterway” refers to a barge/inland waterway, “ship” refers to an ocean going vessel. For user awareness, these additional routing methods have not undergone quality assurance testing as they are not a newly developed feature NRC-RADTRAN Version 1.1 but rather access to these existing features through the GUI has changed; users should conduct quality assurance processes appropriate for the purpose of the calculation when using these calculation features.
- The original FORTRAN code included multiple uses of hardcoded conversion factors, frequently identified as Q-values in the Technical Manual. These were recoded as variables within the FORTRAN code; no GUI or calculational impact should occur as a result of these updates.