PACKAGE MONITORING SYSTEM Type: PMS 1009
manufactured by NUCLEONIX has been primarily
designed to detect Low level of Radioactive contamination
(RaC) in baggages/packages.
This system could be used to detect radioactive
contamination present in a package comprising of steel /
alloy finished goods, atutomotive component / part / other
precision machained parts, Engineering components etc.,
meant for exports.
Inspection of outgoing packed boxes, for radioactive
contamination, could be carriedout, at the final QA floor
shop/dept.
Package Monitoring System. Type: PMS 1009 is offered
as a following configurations for steel industry.
(a) Twin gamma detector pillar arrangement (1.5 mtr Ht)
The gamma detection system essentially comprises of a
single large volume of plastic scintillation detector housed
inside each detector pillar. A large PVT detectors having a
active volume of 10000cc are housed inside each detector
pillar.
Each gamma detector is provided with necessary lead
shielding to minimize the background and to enhance the
MDA of the system.
The gamma assembly is housed inside a low Z material
based detector pillar.
Two such detector pillars are placed along either side of
the passage where the package is going to pass. This
installed monitor automatically detects the presence of
radioactive material in the package if it exceeds preset
levels. The monitoring system does this by measuring the
radiation level taken while package occupies detection area
and comparing this level to the background radiation level
that is measured and updated while detection area is
unoccupied.
The background radiation levels are continuously
measured and automatic adjustment of alarm thersholds
enables a constant statistical false alarm rate to be
maintained during the system use. Occupancy sensors
are used to detect the presence or absence of packages
as it passes through the monitor to know when to monitor
the background and when to monitor the package.
The sensitivity of detectors is dependent upon the
closeness of the detector and source as well as the
slowness with which they pass each other. For packages
two detector pillars are recommended and maximum
distance between pillars is 2m. Additionally barriers not
obstructing the view of the monitor are to be installed to
protect monitor from being damaged by forklifts.
The performance and effectiveness of the installed
instrument is strongly dependent on its ability to measure
radiation intensity over the search area of interest. As such
based on this requirement detector volumes, geometry
and dimensions have been adopted.
Alarm indications and displays are available locally and
are clearly visible to the officers manning the inspection
point and are also available remotely at the central
monitoring PC.
This system could be installed at various entry/exit points
of the installation and can be under the supervision of
security officer.
|
