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| English | Russian |
| active assay | активная проба (Voledemar) |
| high-assay low-enriched uranium | металлическое высокопробное низкообогащенное урановое топливо (HALEU: It’s what the industry calls high-assay low-enriched uranium, or HALEU for short, and these companies can’t bring their reactors to life without it.  atomic-energy.ru, energy.gov rafail) |
| high-assay low-enriched uranium | уран повышенного обогащения (Boris54) |