Subj: Radiological Hazards From An ASD, Neutrons
CONCLUSIONS
(Cont'd):
Neutron biological effects appear to be
very sensitive to |
the noutron spectrum, end it is clear that biological
systems sre good indicators of the integrated effect of
a ncutron spectrum, but good correlation is hampered by
lack of physical data.
The mouse data shows that neutron biological effects are
important only in those circumstances where weupon yield
end configuration favors neutron release and that in these
instances the neutron effect may be roughly comparable
to the gamma effect with distance, perhaps being even
greater at distances less than that where mid-lethzal gamma
cose is delivered.
Foxhole
shielding appears to be less effective in protect-
ing against neutrons then against gammas.
The RBE of neutrons for cataract formation is high.
At high altitudes the range of neutrons relutive to other
effects becomes increasingly important.
To predict neutron response in man;
a.
More experimental data is required;
(1)
(2)
b.
—.-
One
on tne response of mammalian species to
neutrons of different energies,
on the response of enimals of different size
ana species.
Calculations of neutron penctration in tissue
should be made.
more field test should be
performed
to obtain
good physics] data outside and inside the hemisphcres
to tie in previous biological data with good physical
mcasurements.
a.
b.
3.
Studies of physical spectrum to be correlated with
biological data,
Data should be obtained on the effect of the lead
hcmisvheres on the neutron spectrum.
Studies of high doses of neutrons with larger animals
when delivered at very high dose rates.
4.
Participetion in high altitude testis if programned.
egyae
i.
TN oe nee
Lise
+
RECOMMENDA
TIONS:
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