Online detection system for type identification and activity measurement of radiations in gas or liquid

An online detection system for type identification and activity measurement of radiations in gas or liquid, comprising:

• a detector;
• and
• an electronic processing unit;
• wherein,
• the detector comprises:
• a radiation inlet;
• a first measurement chamber;
• a second measurement chamber;
• and
• a radiation outlet;
• wherein,
• the radiation inlet is communicated with an end of the first measurement chamber, and the radiation outlet is communicated with the other end of the first measurement chamber;
• the first measurement chamber is located in the second measurement chamber;
• wherein the first measurement chamber is configured to provide a space for to-be-measured material, and the to-be-measured material circulates exclusively within the first measurement chamber;
• a first radiation detection assembly is disposed in the first measurement chamber and is in direct contact with to-be-measured material, and a second radiation detection assembly is disposed in the second measurement chamber;
• wherein the first radiation detection assembly comprises a plurality of first plastic scintillating fibers or a plurality of first pulse shape discrimination (PSD) plastic scintillating fibers;
• the first measurement chamber and the second measurement chamber are separated by a first housing;
• the first radiation detection assembly is configured to detect a first scintillation light signal of each to-be-identified radiation in the to-be-measured material introduced into the first measurement chamber from the radiation inlet, and convert the first scintillation light signal of each to-be-identified radiation into an electrical signal, so as to be transmitted to the electronic processing unit;
• wherein the first scintillation light signal of any to-be-identified radiation is generated when the to-be-identified radiation irradiates the first radiation detection assembly, and the first housing is configured to separate the to-be-identified radiations with different penetration capabilities in the first measurement chamber;
• the second radiation detection assembly is configured to detect a second scintillation light signal of a target radiation in the second measurement chamber, and convert the second scintillation light signal of the target radiation into an electrical signal, so as to be transmitted to the electronic processing unit;
• wherein the second scintillation light signal of the target radiation is generated when the target radiation irradiates the second radiation detection assembly, and the target radiation is the to-be-identified radiation in the first measurement chamber that is able to penetrate the first housing;
• and
• the electronic processing unit is configured to generate a waveform of each to-be-identified radiation based on the electrical signal of each to-be-identified radiation and the electrical signal of the target radiation, and obtain a type and an activity measurement result of each to-be-identified radiation based on the waveform of each to-be-identified radiation.