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Updated: May 29, 2025
Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
Published on: May 9, 2014
Evaluation of the self-shielding characteristics of an innovative radiosurgical system ZAP-X
Li Mingsheng1, Ma Xiangjie1, Liu Ya1
1Key Laboratory of Radiological Protection and Radiation Emergency, National Institute for Radiological Protection, China CDC, Beijing, China.
Purpose:
The aim of this study was to evaluate the radiation level of a ZAP-X self-shielding system by comparing it with the requirements of the Chinese radiation protection standards and to provide a practical solution for the operation of ZAP-X in China.
Methods:
Under the maximum workload of the ZAP-X system, the weekly radiation dose and the instantaneous dose rate (IDR) outside the safety perimeter of the ZAP-X system were compared to the requirements of relevant standards.
Results:
The maximum weekly and annual dose equivalents, derived from the IDRs and accumulative doses, were as follows:1.99 μSv/week and 0.10 mSv/year, and 3.47 μSv/week and 0.17 mSv/year, respectively.
Conclusion:
The radiation levels around the ZAP-X system meet the requirements of the weekly and annual dose constraints in relevant Chinese standards. The IDRs generated by the ZAP-X system do not meet the requirements of the existing radiation protection standards. A viable solution is to adjust the safety perimeter to comply with existing standards.
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