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You see after Castle again, this
happeng to be a mean of the six months period
from March through August,
Then it slumped
off here and runs along at a nice old level
for the total,
We did not get too much effect from the-
Russian shots and that Teapot affects the
US quite strongly.
And here you see the
strontium rise is so great because this is
fairly fresh stuff and the strontium contri-
bution isn't too high,
ZX think the more interesting thing
rather than these sort of monthly figures,
is the basis data on the cumulation, This
{e the world —- is the strontium 90 data,
What we did was to take this 6,6 megaouries
of strontium 90 suppoced to be produced in
Castle, and take our measured figures and see
what percentage of Castle we were aocounting
for in this worlwide network.
,
If we take the first six months or
so after Castle and draw a straight line we
get something like this,
This shows some tendency to fall off,
That 1s coming down at a slower rate which you’
hope it will do eventually,
A
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