According to a report by Kyodo News Agency on June 24, at the Tokyo Electric Power Company ’s Fukushima Daiichi Nuclear Power Plant, contact operations with molten nuclear fuel (fuel debris) were successful, and it is expected that future operations near the reactor will increase. At that time, it is necessary to pay attention to plutonium and other radioactive substances that cause radiation in the body and release alpha rays. The Japan Atomic Energy Research and Development Agency has developed detectors that can control the distribution of such substances. Compared with the gamma rays released by radioactive cesium, etc., alpha rays can reach a short distance and have low penetration, so external radiation is not a big problem. However, alpha rays have a great impact on the human body. If they are deposited in the lungs after inhalation, they may affect health. Plutonium is contained in the nuclear fuel used in the reactor, and the closer to the fuel debris, the greater the risk of exposure. The detector currently used can only measure the intensity of alpha rays, and cannot understand the type and distribution of radioactive materials. Locking its type requires collecting samples on site, bringing it back to the analysis facility and spending a day or two to investigate. The principle of the detector developed this time is the same as that of the conventional instrument, but the film-like detection part has been thinned according to the characteristics of α-rays. Actually, after measuring the paper for wiping the floor in the reactor building of Units 2 and 3 of the Fukushima Daiichi Nuclear Power Plant, we successfully grasped the detailed analysis of plutonium. Since the detector, data collection device, and notebook computer are currently connected to each other, they will be improved to a model that can be used on site in the future. Japan Atomic Energy Research and Development Agency stated that "there are few examples of the development of alpha-ray detectors. The accuracy will be further improved, hoping to play a role in the scrapping of reactors." LED Emergency Light Remote Head Led Emergency Light Remote Head ,Emergency Light Remote Head ,Emergency Exit Light With Remote Head,Led Remote Head Emergency Light NINGBO JIMING ELECTRIC APPLIANCE CO., LTD. , https://www.feituosafety.com