TNAG-1508-FCO40-2066-Guangdong-nuclear-power-station-project-at-Daya-Bay-safety-c-1987 — Page 73

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RADIATION DETECTION AND INSTRUMENTS

as

a

Nuclear monitoring and control instruments (also known isotopic instruments) generally consist of a radiation source,

electronic circuits and a mechanical nuclear radiation detector,

device.

important

Isotopic instruments are playing an increasingly role in modern industry. They are widely employed in the machine-

mining, chemical, metallurgy, petroleum,

building,

materials industries and in light industries,

building

glass and paper manufacture.

production process

geology, food and

They are particularly used in

for stabilising parameters,

the

controlling

product quality, raising efficiency and lowering costs, improving working conditions and achieving automation. They have given rise

to a new category of automation instruments.

In

monitoring,

and controlling

analysing,

isotopic

instruments

have the following

advantages

over non-nuclear

instruments:

(1)

They

measure

without contact,

the not damaging

measured

object.

(2)

They do not affect the production flow process. They are not affected by temperature, pressure or corrosion.

They are very sensitive, reliable and highly cost effective.

(3)

(4)

They are

capable

of automatic

continuous and

control,

control

and

on analysis

the

production

line,

thus

contributing to the achievement of production automation.

There are three main ways that isotopic instruments are used

in modern industry:

1