materjal või materjali kogum, mis peegeldab tagasi temale langenud kiirgust
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tuumareaktorite tehnoloogias tähendab see termin tavaliselt reaktori osa, mis asetseb reaktorituuma ümber ja peegeldab reaktorituuma tagasi osa sealt tulnud neutronitest
material or a body of material which reflects incident radiation
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in nuclear reactor technology, this term is usually restricted to designate part of a reactor placed adjacent to the core to scatter some of the escaping neutrons back into the score
