Table 2— (Continued)
47
Rate of accumulatio: of particles in terms of radioactivity and mass at given
locations in the fallout area
Effect of rainfall on deposition rates and air concentration of particles
Area distribution of the fallout particles
Standard intensity contours (usual fallout pattern expressed in ro :tgens per
hour at 1 hr at 3 ft above an open contaminated area)
Intensity— activity ratios (in roentgens per hour at 1 hr per kiloton per square
mile at various locations in the fallout area
Intensity— area integral and fraction of the device in the fallout area
Fraction of the total radioactivity and mass of particles deposited on the
earth's surface as a function of time after detonation
Surface-density contours (mass of particles deposited per unit area)
Gross fractionation numbers for the fallout deposited at given locations in the
fallout area as a function of particle diameter
Table 3— RADIOLOGIC AL-EXPOSURE-ENVIRONMENT PARAMETERS
Initial contamination of surfaces
Surface wind speeds and directions and relative humidity
Effect of large- and small-scale surface roughness features of terrain on the
airflow over the surface
Shape. size. general orientation, and character of the surface
Impaction and retention efficiency of particles and surfaces as a function of
the above parameters, particle diameter, and surface density of the deposit
Initial contamination factors for plants, animals, and humans
Inhalation of fallout particles during fallout deposition by animals and humans
as a function of particle diameter, wind speed, and related factors
Natural redistribution of deposited fallout particles and radiation sources
Transfer of soluble radionuclides from the fallout particles to surfaces by
dew and rain as a function of time, particle size. and amount of dew and/or
rain
Effect of erosion by wind and rain of the deposited fallout particles from and
onto surfaces on the ionization rate and: particle surface density as a function of particle diameter, type of surface, wind speed, amount of rainfall.
time period over which erosion occurs, and general terrain features
Movement of soluble radionuclides and particles in and over soils due to rainfall as a function of particle diameter, gross deposit surface density, soil
type, number of rain showers, and amount of rainfall
Movement of soluble radionuclides and particles in streams and rivers asa
function of particle size, deposit surface density, water flow rates, and
other stream or river characteristics
Variation of retention efficiencies and contamination factors on meteorological
parameters (wind, rainfall, relative humidity, etc.)
Inhalation of redistributed (wind-blown) particles
Movement of particles by people and vehicular traffic
External gamma-radiation-exposure parameters
Variation of air ionization rates with time after detonation at given locations
in the fallout region (reference geometry: 3 ft above an open contaminated
area)
Gross ionization-rate decay of the radioactivity carried by particles as a
function of particle diameter
Attenuation of gamma rays by terrain-roughness features
Variation of the air ionization rate with altitude over given locations in the
fallout area
(Table 3 continues on page 48)