Synchronous measurement and dose rate evaluation method for radon and radon daughter

Abstract

The invention discloses a synchronous measurement and dose rate evaluation method for radon and a radon daughter. According to the method, detection equipment is used for conducting synchronous measurement and dose rate evaluation on the radon and the radon daughter, the detection equipment comprises a radon daughter measurement unit, a radon measurement unit and an electronics system, and the radon daughter measurement unit is composed of a cyclone separator, an electromagnetic valve and a radon daughter sampling chamber; a first alpha detector, an ultra-filtration membrane stepper and an ultra-filtration membrane which is arranged on the ultra-filtration membrane stepper are arranged in the radon daughter sampling chamber, the radon measurement unit is composed of a scintillation chamberand a sampling pump, and a second alpha detector is arranged in the scintillation chamber; the first alpha detector is electrically connected with the second alpha detector through the electronics system. According to the synchronous measurement and dose rate evaluation method for the radon and the radon daughter, the radon measurement application environment is enlarged, the measurement precision is improved, multiple parameters are simultaneously acquired, and the measurement efficiency is further improved.

Description

technical field [0001] The invention relates to the field of environmental detection, in particular to a method for synchronous measurement of radon and radon progeny and dose rate evaluation. Background technique [0002] At present, in the measurement of radon and radon progeny, there are few instruments that simultaneously provide parameters such as radon concentration, radon progeny concentration, balance factor, α potential concentration, radon and radon progeny-induced dose rate. The radon concentration measuring instrument can only measure the radon concentration, and then use a specific balance factor for dose evaluation, but the complexity and variability of the site environment makes it impossible for the balance factor to be a fixed value, so the dose evaluation result has a large uncertainty; radon The progeny instrument can measure the α potential concentration of radon progeny, and obtain the dose level caused by environmental radon and its progeny through the ...

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Problems solved by technology

The radon concentration measuring instrument can only measure the radon concentration, and then use a specific balance factor for dose evaluation, but the complexity and variability of the site environment makes it impossible for the balance factor to be a fixed value, so the dose evaluation result has a large uncertainty; radon The progeny instrument can measure the α potential concentration of radon progeny, and obtain the dose level caused by environmental radon and its progeny through the dose / potential conversion factor, but it cannot obtain the radon concentration and balance factor. and if two instruments are used at the same time, the consistency of the two measurement source items cannot be guaranteed

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