Měření radioaktivity v životním prostředí - Vzduch: radon 222 - Část 11: Zkušební metoda pro půdní plyn ve vzorcích odebraných v hloubce (Norma k přímému použití jako ČSN).
NORMA vydaná dňa 1.4.2020
Označenie normy: ČSN EN ISO 11665-11
Rozlišovací znak: 404013
Katalógové číslo: 509253
Dátum vydania normy: 1.4.2020
Počet strán: 40
Približná hmotnosť: 120 g (0.26 libier)
Krajina: Česká technická norma
Kategória: Technické normy ČSN
This part of ISO 11665 describes radon-222 test methods for soil gas using passive and active in-situ sampling at depth comprised between surface and 2 m.
This part of ISO 11665 gives general requirements for the sampling techniques, either passive or active and grab or continuous, for in-situ radon-222 activity concentrations measurement in soil gas.
The radon-222 activity concentration in the soil can be measured by spot or continuous measurement methods (see ISO 11665-1). In case of spot measurement methods (ISO 11665-6), the soil gas sampling is active only. On the other hand, the continuous methods (ISO 11665-5) are typically associated with passive soil gas sampling.
The measurement methods are applicable to all types of soil and are determined according to the end use of the measurement results (phenomenological observation, definition or verification of mitigation techniques, etc.) taking into account the expected level of the radon-222 activity concentration.
These measurement methods are applicable to soil gas samples with radon activity concentrations greater than 100 Bq/m3