The reactors in Hanford used natural uranium with 0.7% U235, not
enriched uranium. A reactor is built to use uranium with a
certain level of U235 and you can not just add some more to

Sure a reactor is built to certain specifications and if you change
specifications you must also change the reactor and that was exactly ehat they
done in Hanford.
Hanford piles were modified from Helium cooling to water cooling piles.This
modification were carried out to make piles uranium enriched.
Similar changes were carried out previously in Oak Ridge pilot reactor to prove
the feasibility of changes.
Only other way to increase output would require a size increase of pile but the
size of piles remained same.
So its very clear after succesful testing in Oak Ridge Hanford used U-235
enriched piles and that u-235 came at the expense of uran bomb.
Why? Because till April 45 MP assumed that 15 kgs of U-235 would be sufficent
for uran bomb.
Thats a reality and stupidty of Manhattan Projecters.
Thanks to their colossal stupidty,in May 1945 they had capacity to build a Uran
bomb but they had no Uran for that.
They had enough Plutonium for bomb but no triggering device for that.
But suddenly US uran production spiked after June 14 and Prof.Alvares at the
last minute learned how to "clean up wires" and saved US plutonium bomb.

What a coincidence?