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the uncontrolled increase in reactivity inside a reactor core that is in a critical state, kontrollimatu reaktiivsuse kasv kriitilises olekus tuumareaktori tuumas
reaktiivsusõnnetus . Tuumaenergia ja kiirguskaitse terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//nuk/reaktiivsus%C3%B5nnetus/1/est (20.06.2026)