Risk Assessment

Katai group utilizes probabilistic risk analysis computer modeling to provide defensible, quantitative answers to regulatory questions. Methodology includes the SAPHIRE (Systems Analysis Programs for Hands-on Integrated Reliability Evaluations) and RESRAD (RESidual RADioactive materials) computer codes. These provide useful tools for evaluating the human and environmental risks at contaminated sites.

SAPHIRE has a variety of analytical techniques:

  • Recursive routines
  • Restructuring and expansion of logic models
  • Conversion of complemented gates and treatment of success branches
  • Logic pruning due to TRUE or FALSE house events
  • Coalescing gates and the identification of modules and independent sub-trees
  • Intermediate results caching
  • Bit-table Boolean absorption

RESRADThe RESRAD family of codes include:

  • RESRAD - Radiological Soil Contamination
  • RESRAD-BUILD - Building Contamination
  • RESRAD-CHEM - Chemical Soil Contamination
  • RESRAD BASELINE - Assessment With Known Concentrations of Radionuclides and Chemicals
  • RESRAD-ECORISK - Ecological Risk From Chemicals
  • RESRAD-Recycle - Assessment of Suitability of Contaminated Materials for Recycling
  • RESRAD-OFFSITE - Analysis of Radiological Doses to Areas Offsite