DCHAIN Input Manual

Input manual and user guide for DCHAIN-PHITS v3.36

This document largely focuses on describing the input parameters used to control the DCHAIN-PHITS code, the modern version of the DCHAIN-SP code previously managed by J-PARC but now developed and maintained by the PHITS team. More details about the input parameters and general information on the usage of DCHAIN can be found after the initial description of all of the input parameters in DCHAIN.

• 1. Introduction to DCHAIN input deck creation
• 2. Version change log
• 3. Input parameters
  • 3.1. Card 1: Title card
  • 3.2. Card 2: Control card
  • 3.3. Card 3: Calculation options
  • 3.4. Card 3.5: Data library selection
  • 3.5. Card 4: Output options
  • 3.6. Card 5: Spallation and neutron irradiation options
  • 3.7. Card 6: Irradiation and cooling times
  • 3.8. Card 7: Requested output times
  • 3.9. Card 8: Nuclide yield file specifications
  • 3.10. Card 9: Calculation region details for region-wise geometries
  • 3.11. Card 9: Calculation region details for xyz mesh geometries
  • 3.12. Card 9: Calculation region details for tet mesh geometries
  • 3.13. Card 10: PHITS and ANGEL output controls
• 4. Additional notes on DCHAIN and its usage
  • 4.1. Execution, requisite files, troubleshooting, etc.
  • 4.2. Important PHITS settings for using [T-Dchain]
  • 4.3. Illustration of time input parameters
  • 4.4. Naming conventions of output files and parameter limits
  • 4.5. Control of uncertainty propagation
  • 4.6. Decay, activation cross section, and fission yield libraries
  • 4.7. Fission settings: explaining the need to increase ICHAIN
  • 4.8. Factors influencing simulation time
  • 4.9. Understanding and using DCHAIN’s dose rate outputs
  • 4.10. Decay chain scheme / change in inventory output file
  • 4.11. Unofficial Python output parsing and processing module
  • 4.12. Example: Comprehensive DCHAIN-PHITS calculation
  • 4.13. Example: 3-step decay dose calculation (reg/xyz mesh)
  • 4.14. Example: Standalone DCHAIN use (without PHITS)
• 5. References
• 6. Example PHITS and DCHAIN input files
  • 6.1. PHITS input file for example in Section 4.12
  • 6.2. DCHAIN input file (PHITS-generated) for example in Section 4.12
  • 6.3. PHITS input file for example in Section 4.13