VEGA POINTRAC 31 Foundation Fieldbus - Manual (Page 10)

10
3 Product description
POINTRAC 31 • Foundation Fieldbus
41779-EN-131119
The handling of radioactive substances is regulated by law. The radia-
tion protection rules of the country in which the system is operated
apply first and foremost.
In Germany, for example, the current radiation protection ordinance
(StrlSchV) based on the Atomic Energy Law (AtG) applies.
The following points are important for measurement with radiation-
based methods:
A handling permit is required for operation of a system using gamma
rays. This permit is issued by the respective government office or the
responsible authority (in Germany, for example, offices for environ-
mental protection, trade supervisory boards, etc.)
You can find further instructions in the operating instructions manual
of the source container.
When handling radioactive sources, unnecessary radiation exposure
must be avoided. An unavoidable radiation exposure must be kept as
low as possible. Take note of the following three important measures:
1 2 3
Fig. 2: Measures for protection against radioactive radiation
1 Shielding
2 Time
3 Distance
Shielding: Provide good shielding between the radioactive source
and yourself as well as all other persons. Special source containers
(e.g. VEGASOURCE) as well as all materials with high density (e.g.
lead, iron, concrete, etc.) provide effective shielding.
Time: Stay as short a time as possible in radiation exposed areas.
Distance: Your distance to the source should be as large as possible.
The local dose rate of the radiation decreases in proportion to the
square of the distance to the radiation source.
The plant operator must appoint a radiation safety officer with the
necessary expert knowledge. He is responsible that the radiation
protection ordinance is maintained and that all radiation protection
measures are implemented.
Control areas are areas in which the local dose rate exceeds a certain
value. Only persons who undergo official dose monitoring are allowed
into these control areas. You can find the respectively valid limit values
Handling permit
General instructions for
radiation protection
Radiation safety officer
Control area