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Normalization to external gamma-ray exposure rate of 1 mR/hr
at 12 hr postshot
The contours of the fallout pattern are drawn with the field
readings corrected to a time 12 hr postshot (Di57).
Therefore, all values, curies and mR/hr, are normalized to an
exposure rate of 1 mR/hr at 12 hr postshot.
The total
exposure rate is given by
T(t) = >, YR(A) 2,18), ;
A
|
where
T(t) = Total mR/hr as a function of time, assuming
debris is uniformly spread over 1 km?,
Normalized values are calculated by the equations that follow.
Normalized mR/hr of each fission product:
NMR (A)
t
where T(12)
MR(A),/T(12),
Total mR/hr at H + 12 hours assuming debris is
uniformly spread over 1 km? (normalization
factor).
Normalized mR/hr of each neutron-induced nuclide:
NIMR(A), = IMR(A),/T(12).
Normalized mR/hr of total external gamma-ray exposure rate:
NMR, = T(t)/T(12).
Normalized fission product curies:
NCI(A), = CI(A),/T(12).