Source of Resins in Accelerator facilities

["Googins, Shawn (OD)" <sgoogins@exchange.nih.gov>]

Bill,

In case no one has responded to you:

Resins are generated in an accelerator facility when the are used to clean the
cooling water that flows through /cools targets/beam extractors/septum, Dees (in
a cyclotron), etc.  The resins have the opportunity to pick up corrosion
products and dissolved metals (Cu, Fe, Tantalum, Platnum, Tungsten, etc) that
have become activated in the cooling water (like Zn-65, Co-60;57, Re-184; 183,
Ta-182). The main reason for having clean deionized water (free of metals, etc.)
is to avoid corrosion of the cooling piping and subsequent water leaks in the
vacuum system (water leaks don't help in maintaining a vacuum needed for for
both particle acceleration without loss of energy and possible shorting of high
voltage equipment in the machine).

 

Shawn Googins, M.S., CHP
Chief, Technical Services Section, RSB
Deputy Radiation Safety Officer, NIH
sgoogins@exchange.nih.gov
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