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Radiation levels in Japan are continuously monitored in a number of locations, and a large number stream their data to the internet. Some of these locations are mandated by law for nuclear power plants and other nuclear facilities. Some of them serve as part of a national monitoring network for use in a nuclear emergency. Others are independent monitoring stations maintained by individuals. Interest in the levels of radiation all over the nation increased dramatically during the Fukushima I nuclear accidents. At that time, a number of people began streaming from monitoring stations, and some international organizations conducted special monitoring operations to assess the state of radiation levels near the power plant and throughout Japan. ==Monitoring at Nuclear Power Plants== Regulations per the Japanese Nuclear Safety Commission prescribe some standards that a monitoring system at a power producing nuclear plant must adhere to. For the purposes of regulation, monitoring systems are divided into two categories. *Category 1: Design of the monitoring system has to fit S-class seismic criteria and have diversity and independence in the channels that constitute the system. *Category 2: These detectors are connected to the plant emergency power system. Additionally, a condition for both categories is that it have the ability to monitor continuously and record its results.〔Nuclear Safety Commission. (Regulatory Guide: Regulatory Guide for Reviewing Radiation Monitoring in Accidents of Light Water Nuclear Power Reactor Facilities ). September 2006.〕 During normal operation, plants have to monitor gas and liquid radioactive effluent releases. The only type that requires continuous monitoring is radioactive noble gasses, although some require monitoring only for every discharge. Other types of radiation must be monitored weekly or monthly according to the regulations.〔Nuclear Safety Commission. NSCRG: L-RE-I.02. (Guide for Radiation Monitoring of Effluent Released from Light Water Nuclear Power Reactor Facilities ). September 1978.〕 Operating power plant sites stream readings from environmental radiation detectors located around or on periphery of the site, detectors measuring radiation levels leaving the plant stack (gaseous effluents), and detectors monitoring the radiation of the discharged waste heat water. Official monitoring websites of nuclear power plants in Japan are listed below. *(Fukushima Daini ) *(Fukushima Daiichi ) *(Kashiwazaki-Kariwa ) *(Shika ) *(Onagawa ) *(Higashidori ) *(Tomari ) *(Hamaoka ) *(Mihama ) *(Takahama ) *(Ooi ) *(Shimane ) *(Tsuruga ) *(Genkai ) *(Sendai ) *(Ikata ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Radiation monitoring in Japan」の詳細全文を読む スポンサード リンク
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