Тип реакторов, использующих в качестве замедлителя и теплоносителя тяжелую воду, а в качестве топлива - природный (необогащенный) уран. Реакторы такого типа эксплуатируются в Канаде, Румынии, Аргентине и ряде других стран.

A heavily shielded container used for the dry storage or shipment (or both) of radioactive materials such as spent nuclear fuel or other high-level radioactive waste. Casks are often made from lead, concrete, or steel. Casks must meet regulatory requirements and are not intended for long-term disposal in a repository. For additional detail, see Dry Cask Storage and Dry Spent Fuel Storage Designs: NRC Approved for General Use.

A positively charged ion.

An ion. An elementary particle (part of an element) carrying a positive or negative electric charge.