William Brown comments

They could have gotten rid of the Tritium completely and safely. Electrolyze the water, release the O2 and H2 separately, at night. The H2 including the Tritium will migrate up through the atmosphere are about 20m/s. Doing it at night minimizes the amount of recombination with O2 in the atmosphere. My only question would be could you somehow use the waste heat at the plant to run the electrolyzers!

Wait... I can't believe it didn't hit me until now!!!! Covid is being used to reverse the Perry Black ships opening Japan up to the world by force! What an elegant solution!!!!! ;-) Just kidding. I visit have visited Japan about every 2 years since 2003. I really really miss it and it's people. :-(

Though, I can't imagine having to try and keep up with am escorted tour. I'm not a tourist, I'm a vacationer.

When I go on vacation, I go on VACATION! [rest, relaxation... Bars, restaurants, temples, long walks though the city looking at and visiting shops.. Matsuri!!!! how can you do an escorted tour and go to a Festival!!! ]

I go to see the REAL Japan!

There is a safe way of disposing of tritium. You need to electrolyze it out of the water, release the tritium as just the hydrogen it is. it will migrate up through the atmosphere and in to space. It rises at the incredible rate of 20 m/s! in seven hours it is clear of the atmosphere, never to return to earth. Probably needs to be done at night to stop solar radiation from causing an excess of recombination. And it would cost a lot for the electricity to do it with.... They could just put up a windmill and use the power from it to do all the work. it might take 10 or 15 years, but so what. It's already been 10 years.

I'm just sayin, probably 10 times cheaper than the existing plan, and 50 times safer.

It should be called Regolith. Same as the moon's surface. I think so anyway.