More on Pavel's calculations

[Elliott Wolin <wolin@jlab.org>]

Hi Elliott,

The result is encouraging: if we make the first 5m above ground of the wall 50
cm
thick, the max. dose rate outside the Hall will be less than 20 urem/h at this
low
level. It will be higher for those who will stay above this 5m level (e.g. roof
of
the counting house, or top of the beam dump outside), but these areas should not
be
occupied that much. The boundary dose has also decreased from 1.5 to 1.0 urem/h
(roof and walls are 10 cm). The dose rate is smaller at the upstream portion of
the
outside Hall, where the counting house is planned to be placed. We may expect
more
or less 'comfortable' 2-5 urem/h inside the building.

Regards,
Pavel
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