Skip to main content Skip to navigation
U.S. Transuranium and Uranium Registries Conference Contributions

Third Asian and Oceanic Congress on Radiation Protection, Tokyo, Japan, May 24-28, 2010

USTUR director talks about the development of a computational code for internal dosimetry

Dr. Tony James visited Japan Atomic Energy Agency’s (JAEA) Tokai Research Center on May 26 and 27, 2010 after giving an invited presentation at the Third Asian and Oceanic Congress on Radiation Protection, Tokyo (on May 24th). In his presentation, he discussed how the UK Health Protection Agency’s IMBA Professional Plus internal dosimetry and bioassay assessment code (which he helped to develop and uses in the USTUR research program) can be extended to accommodate future ICRP recommendations and national regulatory requirements. His visit to Japan was sponsored by JAEA.

Development of computational code for internal dosimetry
Anthony James (USTUR)

From 1997-1999, the UK National Radiological Protection Board (NRPB), British Nuclear Fuels plc (BNFL) and Westlakes Research Institute (WRI) developed the suite of software modules known as “IMBA” – Integrated Modules for Bioassay Analysis. This enabled Approved Dosimetry Services (ADS) in the UK to transition from ICRP 26/30 dosimetry rules and models to ICRP 60/68, as mandated by new UK Ionizing Radiation Regulations (2000).  In 2001, ACJ & Associates, Inc. and NRPB, sponsored by the U.S. Department of Energy and several individual DOE sites, began co-developing IMBA Expert™ USDOE-Edition. This development (completed in 2004) provided DOE with a customized, intuitive and “user-friendly” IMBA-interface, to implement throughout DOE the ICRP 68 biokinetic models and the ICRP 66 Human Respiratory Tract Model (HRTM) for bioassay analysis and internal dose assessment. It introduced  advanced statistical methods, whilst preserving compliance with the mandatory U.S. 10CFR835 “dosimetry rules.” In parallel with USDOE-Edition, other customized editions were co-developed: IMBA Expert™ OCAS/ORAU-Edition – to enable OCAS/ORAU dose-assessors to perform standardized dose calculations in support of the U.S. Energy Employees Occupational Injury Compensation Program Act (EEOICPA 2000), and; IMBA Expert™ CANDU-Edition (for the Canadian CANDU Owners Group, COG) – to meet special dose-assessment requirements in the operation of CANDU (heavy water moderated natural uranium) reactors. In 2005, NRPB (and later the UK Health Protection Agency’s Radiation Protection Division, HPA-RPD) extended the IMBA Expert™ “customized interface” concept to develop the “off-the-shelf” software “package” IMBA Professional Plus (IPP). This package serves the needs of various “international” users – and has gained worldwide application. This presentation looks forward to the further development of the “IPP” approach to implementing future recommendations of ICRP for internal dose assessment and applying recent developments in Bayesian uncertainty analysis. The anticipated ICRP recommendations will be based on Publication 103 and ICRP’s current updating of the ICRP 66 and 68 models. [USTUR-0286-10]

Presentation Slides