159
of the fallout for a building forty feet high
is less important than it is at twenty feet
and 4t should be.
By the way, we have expressed every=
thing in terms of per cent of infinite plane
@ose and we have assumed an infinite plane
dose rate of 1000R per hour and on the basis of
a Brookhaven experiment we utilised 22 per cent
of this as being attributatle to scatter -80 and 20 roughly.
Here again,:is the same kind of data
exploring the per cent of infinite plane dose
rate as a function of the radius of the build-
ing at the center of the celler floor,
This is a rather extreme kind of
condition, that ts it is a limit to the problem
because in terme of the scatter contribution
one is looking at the maximum poscible solid
action.
There is protection to be afforded
of course, by moving to the side of the building,
Again, in terms of our infinite plane
dose rate, that means the dose rate at three
feet over infinite plane with no attenuation
mechanism whatsoever,
this chows relative
contribution from scatter and from the roof,