More on radiation shielding

[Elliott Wolin <wolin@jlab.org>]

Hi Elliott,

40 cm thick, 5m high retainer wall makes the boundary dose rate 1.8+/-0.2
urem/h, and
max. dose outside the Hall 30-50 urem/h. Counting house will have 5-10 urem/h.
All this
with roof and upper wall 10 cm thick (all concrete). No lead and no beam
dumpline.
I think I've completed what we decided to do for now. Over to you...

Regards,
Pavel
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