one
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weapons,
For these latter the dose f.:om the radioactivity stiil
te te denesited ts mer2 Loci liin
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ce
be estimates tay che
accumulated dose from thermonuclear weapons is 0,002 to 0,003r
with another 0.027r still to come,
Ail these doses ‘together add
up to about 0.,035r from weapons already explosed.
maximum dose,
This is a
The loss of radioactivity from weathering has not
been taken into account, nor has the protection afforded by
o
buildings in and around which most people in this country spend
-a large part of their lives,
It would be realistic to divide the
dose by three for Weathering and by seven for. protection afforded
as a result of time spent in houses,
The average inhabitant of
this country may therefore receive in the next 50 years between
0.001 and 0,002r from this fallout, or 0,02 to 0.04 percent of
the radiation that he will receive during the same period from
natural surroundings,"
,
ee
The report has this to say about the effects of acontinuing
program of testing:
“----if the firing of both types of bomb
were to continue indefinitely at the same rate as over the past:
few years, there vould be a buildup of activity gradually reaching
@ plateau in about a hundred years time which, on the Same basis.
‘of calculation, would give the average individual a dose over a
period of 30 years of 0,026r or about 0.9 per cent of what he
would receive in the same’ period from natural sources."
An important radioactive componert of fallout material is
Strontiun-90,
“This isotope may be depcsited in the bone and
wnen present in sufficient quantities can cause bone cancer,
United Kingdom Medical Research Ceunci?
The
veport estimates tinau to
Gate about 0.012 curies of Strontive-90 per square mile has fallen
and that future deposits frem past test
may produce a maxinun
of 0,045 curies of Strentiun-90 ner aou.re mile by 1955,
~ 20 f
Tlsiz
enclosure iif
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