Lawrence Livermore National Laboratory

NARAC uses specialized computer models to predict the blast overpressure effects from a conventional explosive, and the prompt and fallout effects from nuclear detonations. Examples of such codes include:

  • BLAST: Sandia National Laboratories (SNL) code that predicts static overpressure levels from detonation of a chemical high explosive as a function of distance
  • NUKE: SNL code that predicts prompt overpressure, thermal radiation, and ionizing radiation levels and associated health effects as a function of distance from a nuclear detonation (based on relationships described in DOD's Capabilities of Nuclear Weapons Effects Manual-1)
  • LWAC: LLNL code that predicts the radionuclides generated in surrounding material due to neutron activation following a nuclear detonation, and the ground-shine dose rate due to these activation products
  • KDFOC3: LLNL fast-running nuclear detonation fallout code that outputs gridded fields of ground-shine gamma dose rate or integrated gamma dose from fission products deposited on the ground based on semi-empirical relationships developed from analysis of nuclear weapons test data (primarily used to generate rapid preliminary fallout calculations when more accurate predictions are not needed or are not yet available)


Harvey, T., F. Serduke, L. Edwards, L. Peters (1992), KDFOC3: A Nuclear Fallout Assessment Capability, LLNL report UCRL-TM-222788, Lawrence Livermore National Laboratory, Livermore CA.