▁which ▁will ▁allow ▁installation ▁of ▁the ▁re actor ' s ▁fuel ing ▁machine . ▁As ▁of ▁February ▁ 2 0 2 0 , ▁assembly ▁continues ▁on ▁the ▁final ▁top ▁most ▁vertical ▁feature ▁of ▁the ▁overall ▁Unit ▁ 3 ▁re actor ▁building , ▁the ▁pass ive ▁contain ment ▁cool ing ▁system ▁storage ▁tank , ▁which ▁will ▁be ▁set ▁on ▁top ▁of ▁the ▁Sh ield ▁Building ▁Ro of . ▁ ▁S urr ounding ▁population ▁The ▁N uc lear ▁Reg ul atory ▁Commission ▁defines ▁two ▁emer gency ▁planning ▁zones ▁around ▁nuclear ▁power ▁plants : ▁a ▁pl ume ▁expos ure ▁path way ▁zone ▁with ▁a ▁radius ▁of ▁, ▁concerned ▁primarily ▁with ▁expos ure ▁to , ▁and ▁in hal ation ▁of , ▁air bor ne ▁radio active ▁cont am ination , ▁and ▁an ▁ing estion ▁path way ▁zone ▁of ▁about ▁, ▁concerned ▁primarily ▁with ▁ing estion ▁of ▁food ▁and ▁liquid ▁cont amin ated ▁by ▁radio activity . ▁ ▁The ▁ 2 0 1 0 ▁U . S . ▁population ▁within ▁ ▁of ▁Vog t le ▁was ▁ 5 , 8 4 5 , ▁a ▁decrease ▁of ▁ 1 6 . 3 ▁percent ▁in ▁a ▁de cade , ▁according ▁to ▁an ▁analysis ▁of ▁U . S . ▁Census ▁data ▁for ▁ms nb c . com . ▁The ▁ 2 0 1 0 ▁U . S . ▁population ▁within ▁ ▁was ▁ 7 2 6 , 6 4 0 , ▁an ▁increase ▁of ▁ 8 . 8 ▁percent ▁since ▁ 2 0 0 0 . ▁C ities ▁within ▁ 5