Regarding the exposure of the thyroid gland that occurs when radioactive substances leak out due to an accident at a nuclear power plant, the Nuclear Regulatory Commission has determined that the subjects to be measured are those under the age of 19 and pregnant women who have a relatively high risk of carcinogenesis due to internal exposure. We revised the national guidelines by clearly stating that.
This was decided at the regular meeting of the Nuclear Regulation Authority on the 6th, and the target of the measurement of thyroid exposure to the residents in the event of a nuclear accident, etc., as shown in the national "Nuclear Disaster Countermeasures Guidelines" was specified. rice field.
Specifically, among the residents who have been instructed to evacuate or temporarily relocate due to the increase in radiation dose, those under the age of 19 and pregnant women who have a relatively high risk of carcinogenesis due to internal exposure are targeted.
On the other hand, the method of estimating the individual exposure dose based on the data obtained by the measurement and the method of communicating the result to the residents have not been decided, and it is still a subject for consideration.
In the event of a nuclear accident, if the leaked radioactive iodine is taken into the body, it will collect in the thyroid gland near the throat and be exposed, increasing the risk of cancer, so accurate exposure measurement is required at an early stage. ..
"It is a big step to obtain such data in an emergency such as a nuclear accident, but it is necessary to estimate the individual exposure dose to determine the degree of treatment," said Toyoshi Fuketa, chairman of the Regulatory Commission. He expressed his intention to consider solving the remaining issues.