▁dead ▁p enn ed ▁up ▁cattle . ▁ ▁Security ▁measures ▁in ▁power ▁plants ▁fail . ▁The ▁equipment ▁in ▁the ▁spent ▁fuel ▁buildings ▁ad jo ining ▁nuclear ▁power ▁plants ▁that ▁maintain ▁the ▁temperature ▁level ▁of ▁the ▁spent ▁nuclear ▁fuel ▁ro ds ▁will ▁shut ▁down . ▁Sp ent ▁nuclear ▁fuel ▁for ▁nuclear ▁power ▁plants ▁is ▁generally ▁stored ▁in ▁po ols ▁in ▁on - site ▁facilities . ▁Because ▁the ▁foss il ▁fuel ▁power ed ▁back ▁up , ▁power ▁gener ators ▁will ▁run ▁out . ▁At ▁that ▁time , ▁the ▁cool ing ▁po ols ▁that ▁prevent ▁the ▁spent ▁nuclear ▁fuel ▁from ▁over he ating ▁will ▁start ▁to ▁bo il ▁since ▁this ▁water ▁is ▁not ▁re pl en ished . ▁ ▁Radio active ▁steam ▁will ▁vent ▁into ▁the ▁atmosphere ▁due ▁to ▁the ▁water ▁eventually ▁ev apor ating . ▁The ▁spent ▁fuel ▁will ▁eventually ▁set ▁fire ▁to ▁the ▁building , ▁and ▁the ▁steam ▁pressure ▁will ▁cause ▁the ▁storage ▁facilities ▁to ▁expl ode , ▁causing ▁a ▁( non ▁nuclear ) ▁explos ion , ▁em itting ▁radiation ▁not ▁only ▁in ▁the ▁immediate ▁area ▁of ▁the ▁plant ▁but ▁around ▁the ▁glo be ▁due ▁to ▁wind s . ▁ ▁The ▁resulting ▁nuclear ▁dis aster s ▁spread ▁fall out ▁over ▁large ▁areas . ▁This ▁is ▁repeated ▁do z ens ▁of ▁times ▁as ▁shut down ▁nuclear ▁plants ▁and ▁spent ▁fuel ▁houses ▁expl ode . ▁Radio active ▁clouds ▁cross ▁the ▁sk ies ▁and ▁rain ▁car ries ▁the ▁radiation ▁to ▁the ▁ground . ▁Most ▁plants ▁and ▁smaller ▁animals ▁within ▁the ▁affected ▁zones ▁die . ▁Lar ger ▁animals