And this ain’t good:

guardian.co.uk

According to documents from Tokyo Electric Power (Tepco), the company repeatedly missed safety checks over a 10-year period up to two weeks before the 11 March disaster, and allowed uranium fuel rods to pile up inside the 40-year-old facility.

When the plant was struck by a huge earthquake and tsunami, its reactors, designed by US scientists 50 years ago, contained the equivalent of almost six years of highly radioactive uranium fuel produced by the facility, according to a presentation Tepco gave to the International Atomic Energy Agency and later posted on the company’s website.

The revelations will add to pressure on Tepco to explain why, under its cost-cutting chief executive Masataka Shimizu, it opted to save money by storing the spent fuel on site rather than invest in safer storage options.

It really didn’t have to be that bad at the reactor plant. They kept the spent fuel there when they should have been storing it off-site.

When disaster struck earlier this month, the plant contained almost 4,000 uranium fuel assemblies kept in pools of circulating water – the equivalent of more than three times the amount of radioactive material usually kept in the active cores of the plant’s reactors.

This is why disposal is one of the most critical issues of nuclear power.