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Northern Fleet (Murmansk).

Naval nuclear propulsion design, construction, and decommissioning.

No.

Large stocks of naval reactor fuel, including some HEU enriched to 90%.

Unsafeguarded.

Most naval reactor fuel is enriched to between 20-45% U-235. Some submarine reactors, however, use fuel enriched to 90%, as do some Russian icebreakers. Several different sites near Murmansk that store reactor fuel include:

Northern Machine-Building Plant (also known as PO SMP, Sevmash Shipbuilding Plant, or Yard 412), at Severodvinsk, has overall responsibility for the design, construction, and decommissioning of nuclear-propelled ships. Currently the plant is Russia's only shipyard building for refitting nuclear submarines.
Gremikha (also known at the "Yokanga base." Located on the eastern end of the Kola Peninsula on the Barents Sea, Gremikha has been the location of Alfa-and Oscar-class SSNs.
Zapadnaya Litsa Naval Base, is one of five principal storage sites for naval reactor fuel.
Shipyard No. 10, "Shkval," at Polyamy.
Shipyard No. 35, at Sevmorput, is one of five principal storage sites for naval reactor fuel. In August 1993, 1.8 kg of 36% HEU was stolen by two naval servicemen from nuclear submarine fuel assemblies.