User’s Guide

Welcome to the NDPP User’s Guide! This tutorial will guide you through the essential aspects of using NDPP to convert continuous-energy data in to a form which can be readily tallied in a Monte Carlo neutron transport code with a significantly enhanced Figure-of-Merit.

• 1. Installation and Configuration
  • 1.1. Building from Source
    • 1.1.1. Prerequisites
    • 1.1.2. Obtaining the Source
    • 1.1.3. Build Configuration
    • 1.1.4. Compiling on Linux and Mac OS X
    • 1.1.5. Compiling on Windows
  • 1.2. Cross Section Configuration
    • 1.2.1. Using ENDF/B-VII.1 Cross Sections from NNDC
    • 1.2.2. Using JEFF Cross Sections from OECD/NEA
    • 1.2.3. Using Cross Sections from MCNP
    • 1.2.4. Using Cross Sections from Serpent
  • 1.3. Running NDPP
• 2. Writing XML Input Files
  • 2.1. Overview of Files
  • 2.2. NDPP Options Specification – ndpp.xml
    • 2.2.1. <scatt_type> Element
    • 2.2.2. <scatt_order> Element
    • 2.2.3. <nuscatter> Element
    • 2.2.4. <mu_bins> Element
    • 2.2.5. <freegas_cutoff> Element
    • 2.2.6. <cross_sections> Element
    • 2.2.7. <energy_bins> Element
    • 2.2.8. <integrate_chi> Element
    • 2.2.9. <thinning_tol> Element
    • 2.2.10. <print_tol> Element
    • 2.2.11. <output_format> Element
    • 2.2.12. <threads> Element
  • 2.3. Cross-Section Library Specification – cross_sections.xml
    • 2.3.1. <freegas_cutoff> Attribute
• 3. NDPP Utilities
  • 3.1. NDPP_DATA Library
• 4. Troubleshooting NDPP
  • 4.1. Problems with Compilation
    • 4.1.1. Fatal Error: File ‘xml_data_settings_t.mod’ opened at (1) is not a GFORTRAN module file
    • 4.1.2. gfortran: unrecognized option ‘-cpp’
    • 4.1.3. f951: error: unrecognized command line option “-fbacktrace”
    • 4.1.4. make[1]: ifort: Command not found
  • 4.2. Problems with NDPP Execution
    • 4.2.1. Segmentation Fault
    • 4.2.2. ERROR: No cross_sections.xml file was specified in ndpp.xml or in the CROSS_SECTIONS environment variable.