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Standard Practice for Dosimetry for a Self-Contained Dry-Storage Gamma-Ray Irradiator (Withdrawn 2003)
自给式干燥储存γ射线辐射器的剂量测定标准实践(2003年提出)
发布日期:
2000-11-10
废止日期:
2003-08-01
1.1本规程概述了独立干式存储γ射线辐照器应遵循的剂量测量程序。如果遵循这些程序,将有助于确保以可接受的精度和准确性进行校准和测试,并确保在自备干式贮存辐照器中用γ射线电离辐射处理的样品接收到预定范围内的吸收剂量。
1.2本规程涵盖了干式存储γ射线辐射器使用中的剂量测定,即独立干式存储
137
Cs或
60
Co辐射器(屏蔽独立辐射器)。它不包括水下池源、全景伽马射线源,例如机械或气动提升以各向同性照射到房间或通过准直器的伽马射线源,也不包括自足韧致辐射x射线装置。
1.3使用干电池的吸收剂量范围-
本规程涵盖的存储独立γ射线辐射器通常为1到10
5.
Gy,取决于应用。吸收剂量率范围通常为10
-2
至10
3.
Gy/min。
1.4本规程描述了适用于所有独立干式存储γ射线辐照器的一般程序。有关血液辐照剂量测定的具体程序,请参阅规程E1939。有关食品和农产品辐射研究中剂量测定的具体程序,请参阅规程E1900。有关辐射硬度测试的特定程序,请参阅规程E1249。有关无菌释放程序中昆虫辐照剂量测定的具体程序,请参阅指南E1940。在规程E1939、E 1900、E1249或E1940涵盖的情况下,以这些标准为准。此外,本规程不包括辐射防护仪器的吸收剂量率校准。
1.5
本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全和健康实践,并确定监管限制的适用性。
1.1 This practice outlines dosimetric procedures to be followed with self-contained dry-storage gamma-ray irradiators. If followed, these procedures will help to ensure that calibration and testing will be carried out with acceptable precision and accuracy and that the samples processed with ionizing radiation from gamma rays in a self-contained dry-storage irradiator receive absorbed doses within a predetermined range.
1.2 This practice covers dosimetry in the use of dry-storage gamma-ray irradiators, namely self-contained dry-storage
137
Cs or
60
Co irradiators (shielded freestanding irradiators). It does not cover underwater pool sources, panoramic gamma-ray sources such as those raised mechanically or pneumatically to irradiate isotropically into a room or through a collimator, nor does it cover self-contained bremsstrahlung x-ray units.
1.3 The absorbed dose range for the use of the dry-storage self-contained gamma-ray irradiators covered by this practice is typically 1 to 10
5
Gy, depending on the application. The absorbed-dose rate range typically is from 10
-2
to 10
3
Gy/min.
1.4 This practice describes general procedures applicable to all self-contained dry-storage gamma-ray irradiators. For procedures specific to dosimetry in blood irradiation, see Practice E1939. For procedures specific to dosimetry in radiation research on food and agricultural products, see Practice E1900. For procedures specific to radiation hardness testing, see Practice E1249. For procedures specific to the dosimetry in the irradiation of insects for sterile release programs, see Guide E1940. In those cases covered by Practices E1939, E 1900, E1249, or E1940, those standards take precedence. In addition, this practice does not cover absorbed-dose rate calibrations of radiation protection instrumentation.
1.5
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.