GB/T 4835.2-2013 in English

《GB/T 4835.2-2013辐射防护仪器 β、X和γ辐射周围和/或定向剂量当量（率）仪和/或监测仪 第2部分：应急辐射防护用便携式高量程β和光子剂量与剂量率仪》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。
GB/T4835的本部分适用于在应急情况下测量由外部β、X和γ辐射产生的周围和/或定向剂量当量(率)的便携式或移动式剂量当量(率)仪和/或监测仪。它直接适用于在应急情况下使用的剂量当量(率)仪,该仪器用于确定能量高达10MeV 的外部β和/或X及γ辐射产生的剂量当量或剂量当量率。
本部分的目的是规定用于在应急情况下确定周围和/或定向剂量当量(率)的剂量当量(率)仪的设计要求和性能特性。除了经过本部分的修改和列出的新条款,GB/T4835.1―2012中的所有条款均适用于应急目的的仪器。
本部分既没有规定需要哪种仪器,也不考虑仪器的数量或特定位置。本部分没有为特定的事故类型确定使用的仪器。仪器的额定范围以及仪器设计所考虑的放射和非放射条件要充分覆盖由事故分析确定的和/或由相关管理部门或有资质人员规定的事故和事故后条件。预期这些事故将包括剂量当量(率)和极端的环境(例如,温度和湿度)。对于测量低于本部分规定的最小可探测剂量率水平的剂量当量率仪,其技术要求见GB/T4835.1―2012。在这种仪器也用于应急测量时,还应满足本部分的要求。
虽然本部分规定了主要用于应急情况的仪器要求,这些仪器也可用于平时的现场测量。如果仪器配置一个远距离的探测器并提供一个测量运行人员所在位置剂量当量率的附加探测器,要求应适用于这两种探测器。

Scope

This part of GB/T 4835 applies to portable or mobile dose equivalent (rate) instruments and/or monitors for measuring ambient and/or directional dose equivalent (rate) generated by external beta, X and gamma radiation in emergency situations . It is directly applicable to the dose equivalent (rate) instrument used in emergency situations, which is used to determine the dose equivalent or dose equivalent rate generated by external beta and/or X and gamma radiation with energy up to 10 MeV. The purpose of this standard is to specify the design requirements and performance characteristics of dose equivalent (rate) instruments used to determine ambient and/or directional dose equivalent (rate) in emergency situations. In addition to the revisions and new provisions listed in this section, all provisions in GB/T 4835.1-2012 are applicable to emergency purpose instruments. This section neither specifies which instrument is required, nor does it consider the number or specific location of the instrument. This section does not identify the instruments used for a particular type of accident. The rated range of the instrument and the radiation and non-radiation conditions considered by the design of the instrument shall adequately cover the accident and post-accident conditions determined by the accident analysis and/or specified by the relevant regulatory authority or qualified personnel. These accidents are expected to include dose equivalents (rates) and extremes of the environment (eg, temperature and humidity). See GB/T 4835.1-2012 for the technical requirements of the dose equivalent rate meter for measuring the minimum detectable dose rate level below the minimum detectable dose rate specified in this part. When this instrument is also used for emergency measurements, it shall also meet the requirements of this section. Although this section specifies the requirements for instruments mainly used in emergency situations, these instruments can also be used for usual on-site measurements. If the instrument is configured with a remote detector and provides an additional detector for measuring the dose equivalent rate at the operator's location, the requirements shall apply to both detectors.