Evidence of nuclear technology before antiquity

1) Archaeological site of Mohenjo-Daro, have a numerous remains
of people apparently taken by surprise by the explosion
(https://bit.ly/3qmMAB5). There is also an increase in the number
of victims from the periphery to the epicenter of the explosion.
The fact that the explosion was of nuclear origin is evidenced by
the increased radiation background of the remains of the dead and
melted stones of buildings.
2) In India, there is a Siddhars temple (https://bit.ly/3tonl3d) with
healing water from a well-mine. Previously, there was a certain
basalt cylinder in it, which charged the water in antiquity. Judging
by the properties of the water, the cylinder clearly contained
radioactive elements.
3)In the 20th century, the French found huge deposits of uranium ore
in Gabon (https://bit.ly/3udawbj). The development of the proposed
uranium deposit showed that the percentage of uranium-235 found
as a working substance is very small, but there is a lot of
uranium-238. The thing is that uranium-238 is a decay product.
That is, someone once "buried" enriched uranium-235. In 1975,
a conference was convened on this occasion to find out how it
happened that the mine was filled with spent nuclear fuel. After
all, it takes 500000 years to turn uranium-235 into uranium-238!