One of the problems of Fukushima was that one of the meltdowns was reprocessing nuclear weapons grade plutonium

Since the accidental meltdown that one of the meltdowns was reprocessing weapons grade plutonium which has a half life of 24,100 years it means that the water and earth there in Fukushima will be contaminated for 24,100 years (half life) or around 50,000 years total. So, no one can safely live there or drink any water there or grow food there for the next 24,100 years to 50,000 years now. This is a mind boggling statement which is true. The other problem is there is no technical or physical way since the weapons grade plutonium melted down deep into the earth which will for at least 25,000 to 50,000 years keep radiating both the earth there under Fukushima but also the water table of rain returning to the ocean and keep radiating all animals and birds in this area and affect all sea life because Fukushima was water cooled from the ocean as a nuclear power plant too. So, this is a bigger mess and longer lasting in some ways than even Chernobyl in this sense because it is right on the ocean which is problematic for everyone there for 25,000 to 50,000 years regarding eating sea life caught off the coast of Fukushima. Not only that many fish species migrate to other locations after being radiated in the ocean there. And birds from Fukushima might migrate all over carrying radiation to other localities too. so, this is an ongoing problem people and animals are facing there for the next 25,000 to 50,000 years. 

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The half-life of weapons-grade plutonium, which consists primarily of the isotope Plutonium-239 (

Pu), is approximately 24,100 years. While this long half-life means it remains hazardous for millennia, the isotope is highly effective for nuclear weapons due to its low rate of spontaneous fission. 

Key details about weapons-grade plutonium:

• Decay Product:
  

Pu is the main component, weapons-grade material can contain small amounts of other plutonium isotopes with different half-lives, such as

Pu (

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• U.S. Weapons Plutonium Aging Gracefu

  Although plutonium-239 has a half-life of 24,000 years, its decay rate is high enough to produce a significant amount of damage af...

  

  Lawrence Livermore National Laboratory (.gov)

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Pu decays into Uranium-235 via alpha decay.

Composition: Although often cited as 24,100 years, specific estimates range between 24,000 and 24,390 years.

Other Isotopes: While

years).

Significance: Because of this long half-life, the material does not need frequent replacement in weapons, although its radioactivity is sufficient to cause significant damage and require management. 

Plutonium - World Nuclear Association

Aug 16, 2023 — Pu-238, (half-lifea 88 years, alpha decay to U-234, releasing 5.6 MeV) Pu-239, fissile (half-life 24,000 years, alpha decay to U-2...

World Nuclear Association

Plutonium-239 - Wikipedia

Pu or Pu-239) is an isotope of plutonium. Plutonium-239 is the primary fissile isotope used for the production of nuclear weapons,

Wikipedia