![](https://fas.org/wp-content/uploads/2023/04/3d-map-of-Iran.jpg)
Calculating the Capacity at Fordow
While the construction and the announcement of Iran’s Fordow Fuel Enrichment Plant, does not prove an intention to deceive the International Atomic Energy Agency (IAEA), it raises troubling questions. The facility is too small for a commercial enrichment facility, raising concerns that it might be intended as a covert facility to produce highly enriched uranium for weapons.
The SIPRI chapter describes the nuclear weapon modernization programs underway in each nuclear-armed state and provides estimates for how many nuclear warheads each country possesses.
FAS researchers Hans Kristensen and Matt Korda with the Nuclear Information Project write in the new SIPRI Yearbook 2024, released today.
The total number of U.S. nuclear warheads are now estimated to include 1,770 deployed warheads, 1,938 reserved for operational forces. An additional 1,336 retired warheads are awaiting dismantlement, for a total inventory of 5,044 warheads.
A military depot in central Belarus has recently been upgraded with additional security perimeters and an access point that indicate it could be intended for housing Russian nuclear warheads for Belarus’ Russia-supplied Iskander missile launchers.