BS EN 60761-4-2004 连续监测放射性气态流出物的设备.第4部分:碘监测仪的特殊要求

标准号：BS EN 60761-4-2004
中文标准名称：连续监测放射性气态流出物的设备.第4部分:碘监测仪的特殊要求
英文标准名称：Equipment for continuous monitoring radioactivity in gaseous effluents-Part 4:Specific requirements for iodine monitors
标准类型：N56
发布日期：2002/12/4 12:00:00
实施日期：2002/12/4 12:00:00
中国标准分类号：N56
国际标准分类号：17.240
适用范围：This part of IEC 60761 is applicable to equipment intended for the simultaneous, delayed or discrete sequential measurement of radioactive iodine in all forms. When the effluent is sampled for measurement, iodine bound on aerosols is generally collected on a prefilter which should be analyzed separately in a laboratory to provide a complete measurement. It is applicable to equipment designed to fulfill the following functions: - the measurement of the volumic activity of iodine and compounds of radioactive iodine in gaseous effluents or of the released iodine total activity; - the actuation of an alarm signal when either a predetermined concentration or a predetermined total released activity due to iodine or its compounds is exceeded. This equipment is intended for measurement over a wide range of activity in the presence of other radionuclides in the gaseous effluent, including naturally occurring radioactive nuclides. Discrimination against other radionuclides can be important in measuring low levels of radioactive iodine. This standard considers both the use of iodine collection media such as activated charcoal and the direct measurement of iodine in stacks or ventilation ducts. The object of this standard is to lay down specific standard requirements, including technical characteristics and general test conditions, and to give examples of acceptable methods for iodine monitors as defined in clause 4. The general requirements, technical characteristics, test procedures, radiation characteristics, electrical, mechanical, safety and environmental characteristics are given in IEC 60761-1. Unless otherwise stated, these requirements apply in this standard.