EXPERIMENTAL AND CALCULATED ESTIMATES OF THE SHIELDING EFFECTIVENESS OF COMPARTMENTED STRUCTURES EXPOSED TO FALLOUT
NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA
Pagination or Media Count:
Exposure reduction factors were measured inside six compartmented steel structures having different wall thicknesses ranging from 14 to 1-12 in. These were exposed to radiation from fallout of varying age from three to nine days. Calculations based upon the Nelms-Cooper gamma-ray spectrum at H 1.12 hours were made for selected compartments in each of the structures following procedures given in the Office of Civil Defense Professional Manual, PM-100-1. Comparison of experiment and calculation reveals a sensitivity to spectral changes and shows that protection is greater during the periods D 3 to D 9 days than at H 1.12 hours. Overall agreement is generally satisfactory. The calculational methods for radiation through floors, however, appear to be inadequate. Spectra measured on site at D 3 and D 9 days are given.
- Structural Engineering and Building Technology
- Nuclear Radiation Shielding, Protection and Safety