elfen
he bess P15 to ow dete is cbhtaimed upon assuming Saab 60-75%
of the fallout is due to Russian tests having a storage time of 6 te
9 months with the remainder coming from Pacific tests vith a storage
time of 4 years.
This proportbionabion appsaved to eonbinus throvghow:
the summer of 2959.
On this besis it is possible to compute the
initial amomt of any isotope in the resevolr at the time of detonation.
For exemple, Sze Csvb? eontent of the ressvoir according to these
data yas 6.0 megecuries in Cctober 1958. For thia same date, sir and
rain sapling indicated 4 megeeuries of Sr? in the resevoir (13).
Using the Cs/Sr ratio of 1.6, one obteins 6.4 megacuries of ca’.
The initial resevoir content of the other fiegion vroducts measured
are in agreement with that of cel?” secording to the fission yielés
of thege isotopes.
Encouraged by the consistancy of these findings, estinates of
the future levels of external radiation and integral dose from such
radiation wers mats under the assumption that testing is not resumed.
T% is to be emphasized that these figures actually vertain only to
the Argorme site and ite immediate surromdings, although the similarity
in Sr70 deposition at Argonne and at other localities throughous the
North Central and Northeastern United States implies that comparable
fallout levels sxist over this area, which contains roughly one half
the population of the country.
Figure 2? indicates the variation of
gamma dose rate from ali fission products, as well as that due to
ce? alone, starting in 1957,
Extrapolation to future levels is doze