What TEPCO Would Like to Convey regarding ALPS Treated Water

Advanced Liquid Processing System


TEPCO is steadily proceeding
with the decommissioning
of the Fukushima Daiichi
Nuclear Power Station
one by one,
prioritizing safety first,
and working to reduce risks.

As part of the
decommissioning process,
ALPS treated water
has been discharged into the sea
upon ensuring safety
under the government basic policy.

TEPCO will convey
regarding ALPS treated water
in easy-to-understand
manner on this site.


The discharge of ALPS treated water
into the sea

Tritium is all around us

Tritium at nuclear facilities
around the world

1/7 of international standards

18 facts TEPCO would like to convey to you

  • ALL
  • The discharge of ALPS treated water
  • ALPS treated water
  • Tritium
  • The discharge method
  • The assessment of reliability
  • ALPS treated water measures  are part of decommissioning to reduce radiation risks
  • ALPS treated water has been discharged into the sea upon ensuring safety
  • The specially designed equipment for removing radioactive materials
  • Removes radioactive materials other than tritium
  • Total amount of pure tritiated water is equivalent to one tube of eye drops
  • Tritiated water exists as a liquid with almost the same properties as water
  • Tritium is also found in things around us and in our bodies
  • Tritium is not accumulated in our bodies
  • The energy of the radiation emitted by tritium is weak
  • Dilute tritium with seawater to ensure that the water is safe
  • Water to be discharged into the sea meets the government’s safety standard
  • Total annual amount of tritium to be discharged is below the target at the time of operation
  • Tritium has been discharged from nuclear facilities in Japan and overseas
  • Tritium concentration is the same as surrounding seawater 2-3 km away from the discharge point
  • Measure and analyze seawater and fish, and analysis results are available on the website
  • The effect of the discharge of ALPS treated water into the sea on the public is minimal
  • The International Atomic Energy  Agency (IAEA) and experts  from around the world review  the safety
  • Rearing fish and shellfish in a visible safety manner and making them available on the website

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