Radiation dose local measurement results such as city public facilities
Since June 2011, the city has been regularly measuring air radiation doses at 38 fixed points, but due to the construction of new facilities, the number of measurement points has increased from 38 to 40 since April 2015. changed in place.
Based on the fact that the fixed-point measurement results were similar to the various measurement results of the national government and the Tokyo metropolitan government, it is believed that the values do not affect the health of children and that they do not interfere with the range of activities of children and the lives of citizens. I'm here.
However, as a new phenomenon, the existence of places (hot spots) with relatively high radiation doses locally has been reported in other cities. A radiation dose measurement response policy was established, and according to this response policy, radiation dose measurements were carried out in areas where radiation doses were thought to be relatively high in each facility.
Pausing local measurements
Regarding the measurement results from 2012 to the present, the numerical value is stable and is below the standard value (0.23 microsieverts per hour) indicated by the Ministry of the Environment. Local measurements have been suspended since 2017 due to reasons such as the radiation monitoring post figures in the ward dropping to pre-earthquake figures. However, if any uneasiness arises, we will resume immediately. For more information, please visit the link below.
About review such as measurement frequency of space radiation dose
Criteria for implementing radiation dose reduction measures
According to the city's own standards, in areas where the measurement result is 0.23 microsievert per hour or more per centimeter of the ground surface, cleaning will be carried out as a measure to reduce the radiation dose.
Note: According to the Ministry of the Environment's "Decontamination-related Guidelines," as a general rule, no further decontamination of soil in schoolyards, etc. should be carried out if the radiation dose at 1 meter of the ground surface is less than 0.23 microsieverts per hour. Masu. However, the city has established its own standards to ensure greater safety.
Reference: According to the recommendations of the International Commission on Radiological Protection (ICRP), the indicator of the radiation dose received by the general public during normal times is less than 1 millisievert per year (excluding natural radiation dose, etc.). The standard value of 0.23 microsieverts per hour is converted into an annual value of 0.99864 millisieverts, which is less than 1 millisievert per year.
[Annual conversion formula]
Annualized value 0.99864 millisievert = (measured value 0.23 - natural radiation dose 0.04) x (8/24 [time outdoors] + 16/24 [time indoors] x 0.4 [indoor radiation reduction rate] ) x 24 hours x 365 days ÷ 1000 [millimeter conversion]
- Space radiation dose local measurement result of i Plaza (April 1, 2017 update)
- Space radiation dose local measurement result (October 19, 2020 update) of municipal elementary and junior high school
- Space radiation dose local measurement result (October 19, 2020 update) of park, green tract of land
- Space radiation dose local measurement result (November 1, 2016 update) of city hall
- Spatial radiation dose local measurement results at the fire brigade branch office/community disaster prevention center (updated on March 15, 2017)
- Space radiation dose local measurement result of Inagi fire station (January 1, 2017 update)
- Space radiation dose local measurement result (February 15, 2017 update) of municipal hospital
- Spatial radiation dose local measurement result of school lunch joint kitchen (January 1, 2017 update)
- Space radiation dose local measurement result (January 15, 2017 update) of physical education facility
- Space radiation dose local measurement result (April 1, 2017 update) of Cultural Center
- Spatial radiation dose local measurement results at Central Library and Shiroyama Experience Learning Center (updated on August 15, 2016)
- Spatial radiation dose local measurement results of Inagi City Education Center Central Education Counseling Room (Updated January 1, 2017)
- Spatial radiation dose local measurement results at Frendo Hirao complex (updated on January 1, 2017)
- Spatial radiation dose local measurement results at Kamiyato Ryokuchi Experience Learning Center (updated on February 1, 2017)
- Space radiation dose local measurement result (January 1, 2017 update) of health center
- Space radiation dose local measurement result of welfare center (August 15, 2016 update)
- Spatial radiation dose local measurement result (March 1, 2017 update) of environmental learning center
- Space radiation dose local measurement result (January 1, 2017 update) of consumer affairs center
- Spatial radiation dose local measurement results at Hirao branch office (updated on August 15, 2016)
- Spatial radiation dose local measurement results (March 15, 2017 update) such as district halls
- Space radiation dose local measurement result (November 1, 2016 update) of community promotion plaza
- Spatial radiation dose local measurement results of children's houses and after-school clubs (updated on February 1, 2017)
- Spatial radiation dose local measurement result of infant childcare facility (January 1, 2017 update)
- Space radiation dose local measurement result (January 1, 2017 update) of kindergarten
- Spatial radiation dose local measurement results in Inagi Fureai no Mori (updated on February 1, 2017)