(1)
(2)
(3)
They are used directly in the technology and instruments for
monitoring and controlling the production process flow.
They are used in various nuclear technology and devices for
non-destructive testing.
They are used in nuclear analysis technology and instruments
on the production site or for fieldwork.
Most
of
these instruments work on the
interaction
of radiation and material. The
of principle
various physical
the
effects of this
interaction
(absorbtion,
scatterring,
ionization, excitation) form the basis of the
application of
isotopic instruments.
The
three
of
used most economically effective and widely
these instruments are the materials position meter, thickness
gauge and density meter. The neutron water content meter, mud and
sand meter, coal ash meter, alignment devices and various
analysis instruments are also of considerable use.
1.
Materials position meters
These are used for measuring the position of materials
They can be divided into
warehouses and sealed containers.
in
the
following types:
(1) Single material position controller:
of
This is an on/off type
position
of
It is used to maintain the position indicator.
materials within a container at a specified level. When the level
of materials exceeds or falls below the control point, there is a
altered, change in signal and the speed of material feeding is
resulting in the required level being maintained. After this type
the accident rate of meter was adopted in vertical cement kilns,
dropped to a tenth of what it had been previously and output
2
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