Accelerator vs. X-ray unit

[steven t hand <hand@wam.umd.edu>]

Does anyone have a state or federal regulation which defines accelerators
and x-ray units.  In our state regulations we have definitions for 
Analytical X-ray units - x-ray diffraction and fluorescence, and
Analytical X-ray systems - components utilizing x or gamma rays to
determine elemental composition or microstructure analysis, but we do not
have a defintion of any other type of unit (exclude medical) such as the
broad category of "research accelerator which produced X-rays incident to
its operation."  Specifically I have a 300 kev at 6uA unit that is an
accelerator, right now for hydrogen ions.  This is an accelerator but it
will not need all the bells and whistles that our 1 Mev+ units need to
have.  It is overkill to apply all the precautions of an accelerator to
this unit.

Exposure measurements are background on the unit at all places along the
beam line with the exception of one spot at the beginning of the line.
Though here the exposure is only .5 mr/hr on contact.  An x-ray tube unit
limit it 2.5 mr in an hour under our state regulations.

How do other places handle their accelerator and x-ray units that do not
match the exact definition in their regulations ?  Does your state
licensing board issue guidelines on this ?

thank you, you may reply to my email address below or to the radsafe
listserver for the benefit of others.

steve hand
UMCP
hand@wam.umd.edu