Radiation monitor and radiation measurement method

A radiation monitor comprising:

• a plurality of radiation detectors each of which comprises a radiation detection element that emits light with incidence of radiation, and a housing that houses the radiation detection element;
• an optical transmission line that transmits light generated by the plurality of radiation detection elements and causes the light to merge;
• a light detector that converts the light after being merged and guided to the light detector through the optical transmission line into an electric pulse;
• a processor configured to calculate a dose rate of radiation based on a count rate of the electric pulse;
• and
• a light emitting element that emits light having a wavelength different from emission wavelengths of the plurality of radiation detection elements,
• wherein the plurality of housings include at least one housing made of a first material and another housing made of a second material different from the first material,
• wherein each of the plurality of radiation detection elements has sensitivity to radiation and also has sensitivity to light, and emits light at the emission wavelength with incidence of radiation or light,
• wherein the optical transmission line transmits light from the light emitting element to the plurality of radiation detection elements, and transmits light from the plurality of radiation detection elements to the light detector, and
• wherein the processor further configured to determine presence or absence of deterioration of at least the light emitting element based on the count rate of the electric pulses and a light intensity of the light emitting element.

A radiation monitor comprising:

• a plurality of radiation detectors each of which comprises a radiation detection element that emits light with incidence of radiation, and a housing that houses the radiation detection element;
• an optical transmission line that transmits light generated by the plurality of radiation detection elements and causes the light to merge;
• a light detector that converts the light after being merged and guided to the light detector through the optical transmission line into an electric pulse;
• a processor configured to calculate a dose rate of radiation based on a count rate of the electric pulse;
• and
• a light emitting element that emits light having a wavelength different from emission wavelengths of the plurality of radiation detection elements,
• wherein the plurality of housings include at least one housing made of a first material and another housing made of a second material different from the first material, and
• wherein at least one of the plurality of radiation detection elements is a scintillation element containing a rare earth element in yttrium aluminum garnet which is a base material.