TEPCO will not measure activity before discharging nuclear sewage and only use calculations to determine whether it meets the standard

　　China News Service, June 10. According to Kyodo News on the 10th, Japan’s Tokyo Electric Power Company expects to discharge nuclear sewage from the Fukushima Daiichi Nuclear Power Plant into the sea in approximately two years. If it falls below the standard value, seawater will be used for dilution, but the policy is not to measure the activity before discharge, but to judge whether it meets the standard only by calculation.

On April 13, the Japanese government officially decided that the nuclear sewage from the Fukushima Daiichi Nuclear Power Plant will be discharged into the sea after being filtered and diluted.

The picture shows the nuclear sewage storage tank of the Fukushima Daiichi Nuclear Power Plant in Japan on February 13.

　　According to reports, the Japanese national standard for tritium activity is 60,000 becquerels per liter, and TEPCO has set a unique standard of "less than 1,500 becquerels".

TEPCO stated that it will dilute nuclear sewage by more than 100 times with sea water before discharging it.

　　In view of the fact that the Japanese government has decided to discharge into the sea, Tepco’s plan presented in April stated that nuclear sewage will be injected into storage tanks for analysis and the activity of tritium and other radioactive materials will be measured.

After that, instead of mixing and diluting nuclear sewage and seawater in a storage tank, etc., it mixes with the seawater flow drawn up by a pump and flows into the ocean.

However, Tepco does not intend to measure the tritium activity of the water.

　　At the meeting of the Atomic Energy Regulatory Commission, some experts proposed that "in order to demonstrate safety, it should also be discharged after measurement."

In the future, we will discuss whether TEPCO’s policy is appropriate.

　　According to the report, TEPCO stated that it would regularly collect water from the drainage outlet and confirm its activity, but the measurement takes half a day to a day. Therefore, "even if it is found to exceed the standard, it has been discharged into the sea at that time. We will often test and pump it up. When the seawater flow rate is insufficient, the discharge will be stopped urgently", requiring understanding.