Critical Review of Selected Components of RIPD (Radiation-Induced Performance Decrement)
Abstract
RIPD (Radiation-Induced Performance Decrement) is a physiologically-based model of acute radiation sickness (ARS). RIPD estimates: severity of illness due to prompt or protracted exposures to ionizing radiation for total free-in-air doses between 0.75 Gy and 45 Gy; residual performance capability over time for soldiers exposed to ionizing radiation in a military engagement; incidence of performance decrement; incidence of lethality; time to lethality. The RIPD model applies to whole-body exposures to gamma rays and/or neutrons; dose-rate histories can be complex and the exposure period can be as long as one week. RIPD estimates severity of illness and performance capability for up to 1000 hours (about 6 weeks) after the start of exposure. The prompt exposure models in RIPD were developed during the Defense Nuclear Agency's Intermediate Dose Program (IDP) to facilitate consequence assessment and military planning in a nuclear radiation environment. This report (1) summarizes RIPD's performance decrement model, and (2) reviews the four kinetic models around which RIPD's sign/symptom (S/S) severity model structure is built and through which RIPD extends the IDP's prompt exposure S/S severity models to protracted radiation exposures. The assumptions, limitations, and mathematical structure of these four physiologically-based models are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2012
- Accession Number
- ADA578704
Entities
People
- Darren R. Oldson
- Terry C. Pellmar
Organizations
- Applied Research Associates (United States)