Test Of The Switching On/Off - Vega VEGASOURCE 83 Operating Instructions Manual

Function test
Measure the local dose
rate
VEGASOURCE 83 • Source holder
Warning:
Source containers with corroded locking device or source insert must
be replaced immediately.
7.3

Test of the switching ON/OFF

Test the function of the switching ON/OFF on the source holder at
regular intervals.
Source holder with manual switching ON/OFF
1. Loosen the locking screw (version X and C) and remove the lock
(if present) as described in chapter " Setup".
2. Move the source insert as described in chapter " Setup" several
times from the " ON" to the " OFF" position and vice versa. The
source insert should be easily movable and must have no traces
of corrosion in the visible area.
If the source insert cannot be moved from " ON" to " OFF" posi-
tion, follow the instructions in paragraph " What to do in case of
emergency".
If it is hard to move the source insert or if there are other signs of
a malfunction, the source insert must be locked in position " OFF"
and the responsible radiation safety officer informed.
In case of corrosion: Follow the instructions in chapter " Mainte-
nance/Measures in case of corrosion".
Source holder with pneumatic switching ON/OFF
1. Remove the padlock (see chapter " Setup")
2. Switch the source insert by means of compressed air from the
position " OFF" to position " ON". The source insert should move
without interruption to position " ON".
Caution:
Do not grasp into the display window of the indication plate while the
pneumatic actuator is switching over.
3. Reduce the pressure to below 2.5 bar (36 psi). The source insert
must move back to position " OFF.
If the source insert does not move smoothly or shows signs of a
possible malfunction, the source insert must be locked in position
" OFF" and the responsible radiation safety officer informed.
If the source insert cannot be moved from " ON" to " OFF" posi-
tion, follow the instructions in paragraph " What to do in case of
emergency".
In case of corrosion: Follow the instructions in chapter " Mainte-
nance/Measures in case of corrosion".
Measure the local dose rate of the source holder at regular intervals
and document the measurement results.
The measurement data allow conclusions to be drawn about leaks
and possible changes in radiation power.
7 Maintenance and fault rectification
41