To check (1) the validity of the fallout protection factor calculations for residential structures given in British Home Office and U.S. OCD Engineering Manuals and (2) the validity of radiation scale modeling, the United States and the United Kingdom in a joint effort tested one full-scale typical residence (100 psf exterior walls) and two models thereof (50 and 100 psf exterior walls). Each house was tested empty and with various shelter configurations installed. Fallout contamination was simulated by pumping a multicurie encapsulated cobalt-60 source through plastic tubing surrounding the houses. The United States calculations agree with measured dose rates in the 50-psf wall house, while British calculations are slightly lower. Agreement between dose rates measured in the 100-psf wall full-scale and model houses was good at locations away from apertures. Full- scale and model experimental results are generally con¬sistent with both British and U.S. calculations, which show a rectangular shelter to offer maximum protection.
展开▼
