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| Preliminary study of fogging process for fixing high-concentration radioactive aerosol 131I contamination in a radiopharmaceutica production unit |
| GAO Shuai, QIAO Haitao, ZHANG Jing, HU Pei, SHUAI Hongpeng, YIN Huilong, MA Bingwen |
| HTA Co., Ltd., Beijing 102413 China |
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Abstract Objective To prove the feasibility of a Fogging Process in fixing high-concentration radioactive aerosol 131I contamination.Methods High-concentration radioactive aerosol 131I contamination in an 131I-operating glovebox for radiopharmaceutical production was disposed by using fogging and fixing process. The aerosol 131I concentrations were detected and the results were analyzed.Results After a 120 minutes fixing, the 131I contamination in this glovebox reduced from(289 ±9) DAC and (304 ±6) DAC to (21.7 ±2.0) DAC and (26.2 ±1.8) DAC. After a 180 minutes fixing, the 131I contamination in this glovebox reduced from (259 ±10) DAC to (1.80 ±0.18) DAC. These results showed that no aerosol 131I contamination was raised again after 24-hours finishing this task.Conclusion Aerosol 131I concentration in a limited space could be controlled by using a fogging and fixing process, which could reduce the risk of internal exposure of staff. This process could be used by radiopharmaceutical production as an emergency management for dispose high-concentration radioactive aerosol 131I contamination.
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Received: 11 August 2020
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