URANIUM in NATURE

SUPPLY QUESTİONS
Resources: The quantity of a mineral existing in nature
Reserve: The quantity of a mineral that can be recovered and sold at a profit at any given time Forwrad Cost: a common term in supply evaluation, cost of producing U once an ore supply has been discovered, explored, evaluated. It covers costs of mining and milling doesn't cover exploration, assesment, profit, land or mining-right puchase.

Reasably Assured Resources -> RAR
Estimated Additional Resources -> EAR1-2
Speculative Resources -> SR
RAR(<80$/kgU)=1.5 Mt
EAR1(<80$/kgU)=0.91 Mt
RAR(80-130$/kgU)=0.63 Mt
EAR1(80-130$/kgU)=0.35 Mt
EAR2 and SR (OECD total) 10-22 Mt A rule of thumb a 1000 MWe LWR for 30 years on once through cycle requires ~5000 ton natural U.
Then world's 350 GWe with 3.4 Mt of natural U goes for about 55 years.