CONCRETE DOME COVERING RADIOACTIVE DEBRIS ON RUNIT ISLAND, Defense Nuclear Agency Photo ZNEWETAK “Minute cocunts of gzliztonium are expected to be released through the geclogical formation (dome on Runit Island). These, however, will be small and insignificant compared to the amounts alreaay in the lagoon.” Defense Nuclear Agenc:. =iS, April, 1975. 34