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A study on the use of modified extremity dosemeters for the measurement of Hp(3,α)
Radiation Measurements ( IF 2 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.radmeas.2020.106491
J. Dubeau , J. Sun , N. Leroux , J. Atanackovic , L.T. Dauer , S.S. Hakmana Witharana , A. Hanu

Abstract In most jurisdictions, the presently imposed annual eye-lens dose limits are 150 mSv for occupational and 15 mSv for the general public. These limits were based on a 1991 recommendations of the International Commission on Radiological Protection (ICRP), in its publication 60, and they were reiterated in 2007 in the ICRP publication 103. However, recent re-analyses of available epidemiological data appear to indicate that the onset of cataracts may occur at doses as low as 0.5 Gy. This led the ICRP to recommend, in the 2012 publication 118, the lowering of the annual dose limits to the lens of the eye of 20 mSv, averaged over 5 years, with no dose exceeding 50 mSv for any one year. The annual eye-lens dose limit for the general public remained at 15 mSv. The reduction of the eye-lens annual dose limit by nearly one order of magnitude led to large research efforts, including in the area of personal dose monitoring. This paper presents the results of a performance study of Hp(0.07) dosemeters which were modified to allow the measurement of Hp(3,α). The dosemeters were provided by four Canadian nuclear facilities, and one United States medical institution. Hence, five different technologies were tested for a variety of photon qualities and one standard beta field. The motivation to use Hp(0.07) dosemeters was to show that it is possible to leverage dosimetry technologies already in place at various institutions. It was found that, using a low atomic number filter of nominally 300 mg cm−2 in mass thickness, most of the dosemeters considered would provide acceptable performances for the measurement of Hp(3,α).

中文翻译:

使用改良的肢体剂量计测量 Hp(3,α) 的研究

摘要 在大多数司法管辖区,目前强制实施的年度眼晶状体剂量限制为职业 150 毫希沃特和普通公众 15 毫希沃特。这些限制是基于 1991 年国际放射防护委员会 (ICRP) 在其出版物 60 中提出的建议,并于 2007 年在 ICRP 出版物 103 中重申。然而,最近对现有流行病学数据的重新分析似乎表明,白内障的发病可能在剂量低至 0.5 Gy 时发生。这导致 ICRP 在 2012 年出版物 118 中建议将眼睛晶状体的年剂量限值降低 20 毫希,平均为 5 年,任何一年的剂量不得超过 50 毫希。公众的年度眼晶状体剂量限制仍为 15 毫希沃特。将眼睛晶状体年剂量限制降低近一个数量级导致了大量研究工作,包括在个人剂量监测领域。本文介绍了 Hp(0.07) 剂量计的性能研究结果,这些剂量计经过修改以允许测量 Hp(3,α)。剂量计由四个加拿大核设施和一个美国医疗机构提供。因此,针对各种光子质量和一种标准β场测试了五种不同的技术。使用 Hp(0.07) 剂量计的动机是为了表明可以利用各个机构已经采用的剂量测定技术。发现,使用质量厚度标称 300 mg cm-2 的低原子序数过滤器,
更新日期:2021-01-01
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