Spent fuel of the BN-350 reactor moved to secure storage

The United States and Kazakhstan announced today the completion of a shut-down of the BN-350 reactor that operated in Aktau, Kazakhstan from 1973 to 1999. The last phase of the project involved transfer of casks that contained spent fuel of the reactor to a secured facility in Eastern Kazakhstan. The transfer took place in 12 shipments conducted over the last 12 months.

The spent fuel that was put into storage was reported to contain "about 3,000 kg of weapon-grade plutonium and 10,000 kg of HEU (with enrichment less than 33%)" The reactor used fuel with uranium enriched to 17%, 21%, and 26% of U-235. The material has been placed under IAEA safeguards. 

UPDATE: The facility, Baikal-1, is located in Northeastern Kazakhstan, near the former Soviet nuclear test site in Semipalatisk. Here is the facility on Google Maps.

UPDATE: NNSA posted a set of photos from the event.