The Advanced Liquid Processing System (ALPS), a multi-nuclide removal system, removes various radioactive materials from contaminated water.

Outline of ALPS treated water

Status of studies on the handling of ALPS treated water

Team for Contaminated Water and Decommissioning Issues

The Subcommittee on Handling ALPS treated water (Japanese)


Tritiated Water Task Force (2013-2016)

ALPS treated water Q&A

Here, we will answer the questions of ALPS treated water.
If you have questions, please check the answer!

“Treated water” and “contaminated water”
Q1: What is “treated water”?
Q2: What is “contaminated water”?

<Handling of the treated water>
Q3: Why is disposal of ALPS treated water needed?
Q4: Why are two options suggested by the expert committee feasible?
Q5: Is it possible to store or discharge treated water outside of Fukushima Daiichi NPS (FDNPS)?
Q6: Is it possible to store in intermediate storage facilities?
Q7: What are the steps toward the handling of treated water?

<Characteristics of the treated water>
Q8: What is tritium?
Q9: Can tritium be removed?
Q10: Does the treated water contain radioactive materials other than tritium?

<Radiation impact of the treated water>
Q11: How much is the radiation impact of treated water release?
Q12: What regulatory standards are applicable to the discharge from Fukushima Daiichi NPS (FDNPS)?

<Countermeasures for possible reputational damage>
Q13: What kind of countermeasures will be taken for possible reputational damage?

※For more detailed information, please check the following material.

ANRE Special Contents - article on ALPS treated water -

Related Links

Division in Charge

Nuclear Accident Response Office, Electricity and Gas Industry Department, Agency for Natural Resources and Energy

Last updated:2021-02-25