GB/T 16639-2008 in English

《GB/T 16639-2008使用丙氨酸-EPR剂量测量系统的标准方法》由TC58（全国核能标准化技术委员会）归口，TC58SC4（全国核能标准化技术委员会放射性同位素分会）执行，主管部门为国家标准化管理委员会。
标准规定了使用丙氨酸-EPR剂量测量系统测定光子和电子照射下被照射材料中的吸收剂量所涉及的剂量计材料的选择、剂量计制备、仪器设备和剂量测量程序。本标准代替GB/T 16639-1996《辐射加工用丙氨酸��EPR剂量测量系统》。
本标准与GB/T 16639-1996相比主要变化如下：
―――标准名称改为“使用丙氨酸�玻牛校� 剂量测量系统的标准方法”；
―――辐射能量范围由“≤ 30MeV”改为“0.1MeV~28MeV”；
―――重新规定了标准的“意义与用途”，并增加了“4.3 注”的内容；
―――调整了“剂量计制备”一章的正文内容。将1996版中的6.3.3改为本版的6.1注。
―――在“仪器”要求中增加了对分析天平仪器进行校准的技术要求；
―――删除了“建立校准曲线”的技术要求；并增加了“8.1.4注1”、“8.1.4注2”的内容；
―――调整了“EPR波谱测量”的要求；增加了“9.1.5注”，给出了对EPR波谱进行修正的三个方法；
―――调整了“测量不确定度”一章的内容；删除了1996版中的13.4和13.5的内容。

Scope

1.1 This standard specifies the selection of dosimeter materials, dosimeter preparation, equipment and dosimetry procedures involved in the use of alanine-EPR dosimetry system to determine the absorbed dose in irradiated materials under photon and electron irradiation. The system relies on the measurement of amino acid-derived free radicals in alanine by electron paramagnetic resonance spectroscopy. The system is designated as a reference standard dose system (see GB/T 16640). 1.2 This standard applies to the alanine-EPR dose measurement system for measuring absorbed dose under the following conditions: 1.2.1 Absorbed dose range: 1Gy~10⁵Gy. 1.2.2 Absorbed dose rate: ≤10²Gy.s^-1 (continuous radiation field). ≤5×10⁷Gy.s^-1[1-3] (pulse radiation field) 1.2.3 Radiation energy range: 0.1MeV~28MeV^{[1,2 ,4]}. 1.2.4 Radiation temperature range: -60°C~90°C ^[2,5]. 1.3 The values given in the International System of Units are used as standard values, and the values in brackets are for reference only. 1.4 This standard does not address safety issues related to use. The user of this standard is responsible for establishing applicable safety and health standards and determining applicable limitations prior to use.