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| Comparison of calculated lung retention of 239Pu based on different human respiratory tract models |
| CHEN Qianlan, LUO Zhiping, XIA Yihua |
| China Institute of Atomic Energy, Beijing 102413 China |
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Abstract Objective To develop a software program for calculating lung retention calculation based on the Human Respiratory Tract Model (HRTM) recommended in ICRP 130, and compare its results with the program based on the HRTM in ICRP 66.Methods The software programs were compiled by using the Matlab Simulink module. Taken the inhalation of 239Pu as an example, its lung retention was calculated for three absorbing types by using the two models.Results For S and M absorbing type of aerosols, the long term lung retention predicted with the HRTM in ICRP 130 was more than twice as high as that predicted with the HRTM in ICRP 66, and the difference between the two models was more obvious for S absorbing type than for M absorbing type, while for the short and middle term retentions, the values predicted by the two models were close to each other. For the F absorbing type of aerosol, the clearance of lung retention predicted with the HRTM in ICRP 130 was much more slowly than that predicted by the HRTM in ICRP 66.Conclusion A software program based on the HRTM in ICRP 130 has been developed for calculation of lung retention of radioactive aerosols. The results calculated with different HRTMs are different, further studies are needed.
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Received: 24 February 2018
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