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TEPCO announces method for measuring concentration of radioactive materials to be discharged into the ocean, targeting 31 species to be discharged from next spring

The radioactive polluting of our Pacific ocean is just a too important issue for us to trust Tepco, a company which has never been honest in the past 10 years with its announced facts and numbers.

November 14, 2022

Tokyo Electric Power Company (TEPCO) announced on April 14 that it will measure the concentrations of 30 types of radioactive materials, including tritium, which cannot be removed by the purification facilities, to determine whether or not to discharge contaminated water from the Fukushima Daiichi Nuclear Power Plant (Okuma and Futaba, Fukushima Prefecture) after purifying and treating it, immediately prior to its discharge into the ocean. The purification system removes 62 types of radioactive materials, but radioactive materials with short half-lives were excluded from the evaluation because they have decayed.

 According to TEPCO, radioactive materials that are expected to be reduced by half in less than one year and that were determined to be almost nonexistent in the treated water were excluded from the evaluation. TEPCO will continue to measure the excluded substances before they are discharged.

 At a press conference on the same day, Junichi Matsumoto, head of the TEPCO’s Fukushima Daiichi Decommissioning Promotion Company, explained that the reason for reducing the number of substances to be evaluated compared to the radioactive substances to be removed by the ALPS is “to prevent unrealistic evaluations under excessively strict conditions. The measurement details will be submitted to the Nuclear Regulation Commission, and the Commission will review whether they are appropriate or not.

 The evaluation targets include radioactive cesium and strontium. It was confirmed that the total concentration of 30 types of radioactive substances other than tritium was below the government’s standard for release. Then, a large amount of seawater will be mixed with the treated water, which still contains tritium, to dilute the tritium concentration to less than 1/40th of the standard level, and the water will be discharged from the seafloor about 1 km offshore.

 TEPCO is now digging undersea tunnels with the aim of starting tritium discharge in or after next spring.


November 20, 2022 - Posted by | Fuk 2022 | , , ,

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