GB/T 29789-2013 in English

《GB/T 29789-2013辐射防护仪器 放射性惰性气体取样和监测设备》由TC30（全国核仪器仪表标准化技术委员会）归口，TC30SC3（全国核仪器仪表标准化技术委员会辐射防护仪器分会）执行，主管部门为国家标准化管理委员会。
本标准适用于对工作场所、排放到环境中的气态排出流以及环境本身的放射性惰性气体进行取样和连续测量的设备。规定的监测是一种连续和实时的测量过程。本标准包括取样过程或用于回顾性实验室分析的样品获取过程。
本标准的目的是建立必需的一般要求并给出用于放射性惰性气体取样和监测可行方法及设备的实例。本标准是对现行标准GB/T7165.3―2008的完整扩充,后者仅适用于气态排出流中固定安装的可携式和可移动式的放射性惰性气体取样和监测设备,而本标准扩大覆盖面以包括监测放射性惰性气体可能造成放射性危害的所有场合。设备设计成在正常运行工况以及在应急工况(包括事故期间和事故后)下工作。根据应急工况的特性,可能需要安装专门用于正常运行工况设计的设备和专门用于应急工况设计的其他设备。
本标准适用于提供下述功能的放射性惰性气体取样器和监测仪:
―――在工作场所、排放点的气态排出流以及环境中测量放射性惰性气体的体积活度及其随时间变化;
―――在正常运行工况期间以及在应急工况下(包括事故期间和事故后)进行测量;
―――当超过预置体积活度或浓度或预置总排放活度时,启动报警;
―――确定在给定时间范围内排放的气体总活度和(或)提供不同排放气体混合物的组成信息;
―――含有惰性气体的空气或气体取样和回顾性分析。
含有同位素219Rn、220Rn和222Rn的氡是天然产生的放射性惰性气体,本标准不考虑对其进行测量。
氡及其子体的存在可能明显干扰本标准涉及的惰性气体的正确测量。
本标准规定了设备的一般特性、一般试验方法、机械特性、电气和电子特性、辐射特性、安全特性和环境特性以及正确鉴定和合格证书。如果设备作为核设施辐射连续监测中央控制系统的一部分,可能要有与那些系统有关的其他标准的附加要求。

Scope

This standard applies to equipment for sampling and continuous measurement of radioactive noble gases in the workplace, in gaseous effluent streams discharged into the environment, and in the environment itself. Prescribed monitoring is a continuous and real-time measurement process. This International Standard covers the process of sampling or obtaining samples for retrospective laboratory analysis. The purpose of this standard is to establish the necessary general requirements and to give examples of possible methods and equipment for sampling and monitoring of radioactive noble gases. This standard is a complete expansion of the current standard GB/T 7165.3-2008, which is only applicable to portable and mobile radioactive noble gas sampling and monitoring equipment fixedly installed in the gaseous exhaust stream. Including monitoring all occasions where radioactive noble gases may cause radiological hazards. Equipment is designed to work under normal operating conditions as well as under emergency conditions (including during and after accidents). Depending on the nature of the emergency conditions, it may be necessary to install equipment designed specifically for normal operating conditions and other equipment specifically designed for emergency conditions. This standard applies to radioactive noble gas samplers and monitors that provide the following functions: -- measure the volumetric activity of radioactive noble gases and their changes with time in the workplace, the gaseous exhaust stream of the discharge point, and the environment; -- Perform measurements during normal operating conditions and under emergency conditions (including during and after accidents); -- activate an alarm when the preset volume activity or concentration or preset total emission activity is exceeded; -- determine The total activity of the gas emitted within a certain time frame and (or) provide information on the composition of different gas mixtures emitted; -- Sampling and retrospective analysis of air or gas containing inert gases. Radon containing isotopes ²¹⁹Rn, ²²⁰Rn and ²²²Rn is a naturally occurring radioactive inert gas, which is not considered to be measured in this standard. The presence of radon and its progeny may significantly interfere with the correct measurement of the noble gases covered by this standard. This standard specifies the general characteristics, general test methods, mechanical characteristics, electrical and electronic characteristics, radiation characteristics of equipment