Location; Internal Obstructions - Vega SHLG Operating Instructions Manual

Mounting
5.
Compare the shipment against the packing slip to make certain you
received your complete order.
6.
If you are not installing or mounting the source holder immediately, find a
storage area that is isolated and secure.
Low level radiation fields are always present around a source holder.
!
NOTE
7.
Allow access to authorized personnel only.
8.
Maintain records of the shipping and receipt.
9.
While not required, a survey and leak test provide additional assurance that
the source holder is in safe condition.

4.3 Location

At the time you ordered your equipment, VEGA sized the source holder for
optimal performance for the designated application. If the location of the equipment
has changed or is different from the original order, notify VEGA before installing
the equipment.
Locate the source holder where debris or other material cannot coat
!
it to ensure the continuing proper operation of the source ON/OFF
shutter. Many regulatory agencies, such as your U.S. Agreement
NOTE
State, the U.S. Nuclear Regulatory Commission, or other local and
international nuclear regulatory agencies, require periodic testing
of the ON/OFF mechanism. See the Radiation Safety Manual for
details about current regulations.

Internal Obstructions

If an internal obstruction such as an agitator or a baffle is directly in the path of
the radiation beam, that obstruction can shield the radiation from the detector.
Such an obstruction can diminish performance of the equipment.
If your vessel has a central agitator shaft, the source holder and the
detector can mount to the vessel on a chord other than the
!
diameter. Mounting the source holder and the detector in this
NOTE
manner allows the beam of radiation to avoid the agitator shaft.
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