TABLE 1 ROUGH ESTIMATE OF REDUCTION IN GAMMA RADIATION WITHIN STRUCTURES ‘v PERCENTAGE OF GUT-OF-DOORS LEVEL TYPE STRUCTURE ONE STORY FRAME HOUSE 50 First Floor 10 Zz 10 Basement (Center) Basement (Side) MULTI STORY REINFORCED CONCRETE 10 Lower Floors (Away from windows) ~ 0.1 Basement SHELTER (equivalent to three feet of earth) ~ 0.1 -37 - i

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