初年度の処理水放出終了　東電福島第１原発

　東京電力は１７日、福島第１原発にたまる処理水の４回目の海洋放出を終えたと発表した。これで初年度に予定していた放射性物質トリチウムを含む処理水計約３万１２００トンは全て海に流した。
　処理水放出は２０２３年８月から開始。１回当たり約７８００トンの処理水を大量の海水で薄め、２週間余りかけて海底トンネルから沖合に放出する作業を４回実施した。東電や国などは海水や水産物のトリチウム濃度の測定を実施しているが、いずれも国の基準値を大幅に下回っている。（2024/03/17-16:37）

Tokyo Electric Power Company Holdings Inc. said Sunday that its Fukushima No. 1 nuclear power plant has completed its fourth and final round of treated water release into the ocean for the initial year.
   The tsunami-crippled nuclear plant discharged about 31,200 tons of treated water, which contains small amounts of radioactive tritium, into the ocean in the initial year as planned.
   The discharge of treated water started in August 2023. About 7,800 tons of treated water was diluted with a large amount of seawater each time and discharged offshore from an undersea tunnel over a two-week period four times.
   Tritium levels in seawater and fishery products measured by TEPCO and the Japanese government have been below national standards.
   In the fourth round that began on Feb. 28, the discharge was suspended for over 15 hours to confirm safety on Friday when a strong earthquake struck Fukushima Prefecture, home to the nuclear plant.