scope:

This standard is applicable to equipment intended for continuous monitoring of aerosols in gaseous effluents discharged in the environment. It is applicable to equipment designed to fulfil the following functions: - the measurement of the concentration of radioactivity emitted in gaseous effluents in the form of aerosols, either per unit time together with the variations as a function of time, or integrated over a longer time period, for example 24 h; - the actuation of an alarm signal when either a predetermined high concentration or a predetermined time integrated concentration of an aerosol activity is exceeded. In order to improve the precision and sensitivity of the measurements, complementary laboratory analyses of the filters after collection may be performed. Electrostatic precipitator and impactor equipments are not considered in this standard. Effluent aerosol monitors designed for monitoring alpha emetters such as transuranic elements or those which require compensation for natural alpha activity will be considered in detail in a future publication. Effluent aerosol monitors designed for selective monitoring (for instance plutonium aerosol contamination), are not considered in this standard.