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首页> 外文期刊>Journal of radiological protection: Official journal of the Society for Radiological Protection >Synchrotron radiation shielding design and ICRP radiological protection quantities
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Synchrotron radiation shielding design and ICRP radiological protection quantities

机译：同步辐射屏蔽设计和ICRP放射防护量

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摘要

Protection and operational quantities as defined by the International Commission on Radiological Protection (ICRP) and the International Commission on Radiation Units and Measurements (ICRU) are the two sets of quantities recommended for use in radiological protection for external radiation. Since the '80s, the protection quantities have evolved from the concept of dose equivalent to effective dose equivalent to effective dose, and the associated conversion coefficients have undergone changes. In this work, the influence of three different versions of ICRP photon dose conversion coefficients in the synchrotron radiation shielding calculations of an experimental enclosure has been examined. The versions are effective dose equivalent (ICRP Publication 51), effective dose (ICRP Publication 74), and effective dose (ICRP Publication 116) conversion coefficients. The sources of the synchrotron radiation white beam into the enclosure were a bending magnet, an undulator and a wiggler. The ranges of photons energy from these sources were 10-200 keV for the bending magnet and undulator, and 10-500 keV for the wiggler. The design criterion aimed a radiation leakage less than 0.5 mu Sv h(-1) from the enclosure. As expected, larger conversion coefficients in ICRP Publication 51 lead to higher calculated dose rates. However, the percentage differences among the calculated dose rates get smaller once shielding is added, and the choice of conversion coefficients set did not affect the final shielding decision.
机译：国际放射防护委员会（ICRP）和国际辐射单位和测量委员会（ICRU）定义的防护和工作量是建议用于外部辐射放射防护的两组量。自80年代以来，保护量已从等效剂量概念转变为等效有效剂量等效于有效剂量的概念，相关的转换系数也发生了变化。在这项工作中，已经检验了三种不同版本的ICRP光子剂量转换系数在实验外壳的同步辐射屏蔽计算中的影响。这些版本是等效等效剂量（ICRP出版物51），有效剂量（ICRP出版物74）和有效剂量（ICRP出版物116）转换系数。进入外壳的同步加速器辐射白光束的来源是弯曲磁铁，起伏器和摆动器。来自这些源的光子能量的范围对于弯曲磁体和起伏器为10-200 keV，对于摆动器为10-500 keV。设计标准的目标是从外壳泄漏小于0.5μSv h（-1）的辐射。不出所料，ICRP出版物51中的较大转换系数导致较高的计算剂量率。但是，一旦添加屏蔽，计算出的剂量率之间的百分比差异就会变小，并且设置的转换系数的选择不会影响最终的屏蔽决策。

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