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One of our building managers approached our HVAC
Supervisor with some small portable household-type dehumidifiers. We had
been told that the equipment had spent some time in the accelerator
tunnels. The dehumidifiers have been surveyed and are considered to be
radioactive. This poses some interesting problems (sampling, recycling,
decontamination of recovery units, storage, etc.). As we asked additional
questions, we learned that a long time ago, several larger dehumidifiers were
intentionally installed in the tunnels. So it looks like this is not just
a one-time issue for us.
Right now, we are holding on to the units. I
have asked that we not extract the refrigerant until we have an idea as to how
to handle it so that we don't get caught with non-compliances with the EPA
regulations regarding CFCs and HCFCs. The units aren't leaking at
present.
Has anyone else had to deal with potentially
radioactive refrigerant? How does one analyze this for tritium and other
radionuclides? Any insight that anyone can offer would be most
appreciated? Thanks!
+++++++++++++++++++++++++++++++++++
+ Elaine T. Marshall + Fermi National Accelerator Laboratory + Facilities Engineering Services Section + Administration/Safety + Voice: (630 840-8756/Fax: (630) 840-4980 + E-Mail: EMarshall@fnal.gov +++++++++++++++++++++++++++++++++++ |