Nuclear fuel: In 1995, Russia signed a contract to supply a light water reactor for the plant (the contract is believed to be valued between $700,000,000 and $1,200,000,000 USD).[16] Although the agreement calls for the spent fuel rods to be sent back to Russia for reprocessing, the US has expressed concern that Iran would reprocess the rods itself, in order to obtain plutonium for atomic bombs. In March 2007, following Iran's refusal to halt enrichment, Russia announced it will withhold the delivery of nuclear fuel, pretexting overdue payments vis-à-vis the Bushehr reactor even though Iran has denied any late payment.