External effective dose conversion factors for deriving clearance levels of uranium and transuranium wastes

Watanabe, Masatoshi; Takeda, Seiji ; Kimura, Hideo

We have developed the probabilistic assessment code system (PASCLR ver.2) for derivation of clearance levels of radioactive materials for the uranium and transuranium (TRU) wastes. This code supports the dose estimation for the exposure pathways in two different scenarios; landfill disposal as industrial waste and recycle or reuse of materials. Thirty one external exposure pathways were considered in the two scenarios. The irradiation geometry for specific individuals in the external exposure pathways are divided into anteroposterior, isotoropic and rotational conditions. We employed the EGS4 code to estimate the effective dose buildup factors of these irradiation conditions for QAD-CGGP2 code. This report provides estimated values of the effective dose buildup factors, and the calculating process and the results of the external effective dose conversion factors with QAD-CGGP2 code.