| Show ivi I Y OU By n it Bountiful Civil Chil Defense I I A thought thought- When people start waiting wailing in line to get out of or America instead of waiting in line to get in that will willbe willbe willbe be the time to 0 start worrying about our Amer American can way of oC lif life e. e INSIDE SIDE A shelter sheller the chief radiation danger is from the penetrating rays gamma-rays emitted emitted emit emit- ted by fallout particles lying on the ground surface and on the roof Unless these particles particles parti parti- cles Iles can be removed as by spraying ying with jets of water heavy shielding materia malcria 1 s sneed sneed sneed need to be between a person I and the fallout to to absorb I these rays ra s For example a basement below ground level provides shielding from Crom almost all of the thc gamma rays emitted by fallout on the earths earth's surface Thick overhead concrete floors will reduce penetration o 0 f gamma rays from the roof Interior rooms and halls in good radiation protection Sub Sub- Subways w ways s 's and caves make excellent excellent excellent excel excel- lent radiation shelters The approximate effectiveness of shelter in protecting against fallout radiation is listed SHELTER First floor of a brick home 3 1 of outside radiation radiation radiation ra ra- ra- ra typical home basement basement base base- ment 10 1 of oC outside radiation radiation radiation radia radia- tion basement fallout shelter with 8 concrete ceiling and walls 1 1100 of outside radiation radiation radia radia- tion lion underground fallout shelter shelter shel shel- ter tel covered co with 36 of oC earth 1000 1 of outside radiation In the terrible event of a nuclear war knowing how to recognize a good radiation shelter may be the Ule most important important important im im- im- im tl tiling thing ng you ou have ever learned ARRIVAL OF OJ fallout Beyond Beyond Be Be- yond the zones of heat and blast destruction fallout does not arrive in appreciable quantities quantities quan quan- until at least one-half one hour after the nuclear sion Time of arrival depends on the distance and wind ve ve- For example with upper upper upper up up- per air winds of oC 60 miles per por hour it would take ten hours for fallout to travel miles The available a time should be used to get inside the shelter |
