[ RadSafe ] Removing ductwork

NORTH, Ralph RNORTH at fpm.wisc.edu
Thu Apr 6 07:45:20 CDT 2006

What is your policy regarding allowing sheet metal workers to disconnect
ventilation ductwork/pipes with residual radioactive contamination (100
- 2000 cpm) on the inside (outside surface of ductwork is clean) from
contamination-free fume hood or ceiling? Isotopes are H-3, C-14 or

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