🌐EnglishEnglishDeutschEspañolFrançaisРусский日本語EntityQ4391448· pop 6reactivitymeasure of the criticality of a nuclear chain reacting materialAvailable in 6 languagesDeutsch日本語РусскийSlovakUkrainianvia Wikidata sitelinks · CC0Connectionsnuclear reactorEntityphraseEntity