Abstract
Assessing the risks due to thoron and its progeny is of considerable importance in the public domain and in operations related to the thorium fuel cycle. Deposition-based progeny concentration measurement techniques (direct thoron progeny sensors, DTPSs) appear to be best suited for radiological risk assessments among both occupational workers and general populations. The DTPSs lodged in wire-mesh and filter paper-integrated sampler and operated in flow mode can be used to measure the unattached and attached fractions. The wire-mesh-capped DTPS system can be used to measure the deposition velocity of the unattached and attached fractions separately. In the present work, the DTPSs in different modes have been described and the experiments for measuring the multiple parameters related to the indoor thoron progeny are presented.
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