After Fukushima nuclear sewage treatment, the activity of radioactive material strontium 90 once exceeded the standard

　　China News Service, September 16. According to Kyodo News, Japan’s Tokyo Electric Power Company said on the 15th that after the multi-nuclide removal equipment (ALPS) of the nuclear sewage of the Fukushima Daiichi nuclear power plant was purified, the activity of strontium 90 was high. About 3 times the national standard value.

However, because it was lower than the standard value in subsequent tests, Dongdian believed that it was only a temporary phenomenon, and the reason was not clear.

Data map: Staff of Japan's nuclear regulator wearing protective clothing and masks inspect the sewage storage tanks of the Fukushima Daiichi nuclear power plant.

　　According to Tepco, the activity of strontium-90 in the treated water sampled on July 28 was 93 becquerels per liter, while the national standard value was 30 becquerels.

Because the activity of strontium 90 was declining smoothly in the middle of the treatment process, TEPCO believes that the reason may lie in the latter half of the process.

The activity of strontium 90 in the water sampled on August 4 was 2.7 becquerels.

　　It is reported that the excess water is kept in the storage tank and will be purified again.

ALPS has another 5 sets, and TEPCO said that the purification of polluted water will not be affected.

TEPCO plans to discharge the treated water into the sea starting around next spring.

　　On March 11, 2011, an earthquake with a magnitude of 9.0 occurred in the waters off northeastern Japan and triggered a huge tsunami.

Affected by the earthquake and tsunami, a large amount of radioactive material leaked from the Fukushima Daiichi Nuclear Power Plant.

　　On April 13, 2021, the Japanese government decided to discharge a large amount of nuclear sewage from Fukushima into the sea.

According to the plan, the nuclear sewage will be diluted with sea water and then discharged about 1 km offshore through an undersea tunnel.

The move was strongly opposed by the Fukushima Prefecture Fisheries Association and the National Federation of Fisheries Associations of Japan, as well as the international community.