BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 115 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 115
Volume 1 9 Radiation Protection
1
9.2
Mounting the Shielding
9.2.1 Safety Instructions
The shielding container consists of a lead-filled, stable cast housing.
A rotary shutter is installed to close the radiation exit channel.
Operation is carried out from behind by a T-handle, which is secured
by a padlock in open as well as in closed position. The locking pre-
vents that the radiation path can be closed or opened by unautho-
rized persons. Also is prevents that unauthorized persons can
remove the source.
Radiation exposure during
installation
To keep the radiation exposure of the assembling personnel as low
as possible, only licensed personnel who have been trained on how
to handle radioactive substances are allowed to assemble or disas-
semble the shielding with the source. The work is performed
according to the instructions and under the supervision of the Radi-
ation Safety Manager. It has to be ensured that the lock of the
shielding is closed and secured, so that no unshielded radiation can
exit. Make sure the shielding is not modified or damaged.
Vibrations
Constant vibrations can loosen the lead in the shielding and grind
up lead in extreme cases. In this case, the shielding effect and the
function of the shielding are no longer guaranteed. In the worst
case, the radioactive substance may leak out. Also, constant vibra-
tions can loosen the source holder or the source, which also would
impair both the function and the shielding effect.
A corrosive atmosphere requires an additional protective covering
made from a suitable material, such as stainless steel sheet, or the
shielding itself must be made from a suitable stainless steel. Corre-
sponding versions are available on request from BERTHOLD
TECHNOLOGIES.
Depending on the operation conditions, the function check has to
be repeated at appropriate intervals, at least once a year.