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Report No.
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Development of internal dosimetry evaluation code for chronic exposure

Kimura, Masanori; Kinase, Sakae; Hato, Shinji*

The Fukushima Daiichi Nuclear Power Plant accident resulted in a wide range of radioactive contamination. As a result, the public concerns the internal doses for chronic exposure due to intake in daily life. To reduce some concerns, it is important to develop the evaluation method of chronic internal dose. The JAEA developed the DSYS code that calculates internal dose to the public with dose coefficients and treats dose assessment of internal exposure due to acute intake based on the ICRP's Publications (Publ.30, 56, 66, 67, 69, 71, 72). Therefore, it cannot apply to the evaluation of whole-body retention values or committed effective/equivalent dose for chronic exposure. In the present study, the authors considered the evaluation method of chronic internal dose and developed the DSYS-Chronic to evaluate chronic internal dose by incorporating into the DSYS code. This report shows the outline of the DSYS-Chronic code and the example of evaluation results.

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