▁React ors ▁Program ▁Research ▁under ▁the ▁DO E ▁( not ▁a ▁National ▁Labor atory ) ▁ ▁National ▁Pet role um ▁Technology ▁Office ▁ ▁Nev ada ▁Test ▁Site ▁ ▁New ▁Brun sw ick ▁Labor atory ▁ ▁Office ▁of ▁F oss il ▁Energy ▁ ▁Office ▁of ▁River ▁Prote ction ▁ ▁P ante x ▁ ▁Rad i ological ▁and ▁Environment al ▁Sciences ▁Labor atory ▁ ▁Y - 1 2 ▁National ▁Security ▁Complex ▁ ▁Yu cca ▁Mountain ▁nuclear ▁waste ▁repository ▁ ▁Other : ▁ ▁P ah ute ▁M esa ▁A irst rip ▁– ▁N ye ▁County , ▁Nev ada , ▁in ▁supporting ▁Nev ada ▁National ▁Security ▁Site ▁ ▁N uc lear ▁weapons ▁sites ▁ ▁The ▁DO E / N NS A ▁has ▁federal ▁responsibility ▁for ▁the ▁design , ▁testing ▁and ▁production ▁of ▁all ▁nuclear ▁weapons . ▁N NS A ▁in ▁turn ▁uses ▁contract ors ▁to ▁carry ▁out ▁its ▁respons ib ilities ▁at ▁the ▁following ▁government ▁owned ▁sites : ▁ ▁Design ▁of ▁the ▁nuclear ▁components ▁of ▁the ▁weapon : ▁Los ▁Al amos ▁National ▁Labor atory ▁and ▁Lawrence ▁Liver more ▁National ▁Labor atory ▁ ▁Engineering ▁of ▁the ▁weapon ▁systems : ▁Sand ia ▁National ▁Labor ator ies ▁ ▁Man ufact uring ▁of ▁key ▁components : ▁Los ▁Al amos ▁National ▁Labor atory , ▁the ▁Kansas ▁City ▁Plant , ▁and ▁Y - 1 2 ▁National ▁Security ▁Complex ▁ ▁Test ing : ▁Nev ada ▁Test ▁Site ▁ ▁Final ▁weapon ▁and ▁war head ▁assemb ling ▁and ▁dis m ant ling : ▁P ante x ▁ ▁Rel ated ▁legisl ation ▁▁▁▁ 1 9 2 0