RADOS RTM644lnc
Large Clearance Monitoring System
CheckPoint:Waste™ family
RADOS RTM644lnc
Large Clearance Monitoring System
Class XL
Typical deployment areas for the members of the
CheckPoint:Waste™ family are the boundaries
between controlled and clean areas of nuclear-
licensed sites. Throughput requirements and typical
size and shape of goods are accommodated by a
number of different CheckPoint:Waste™ models.
FEATURES
•qualied method to release non-radioactive materials
from nuclear facilities on the basis of dened clearance
levels
•means for measurement of large waste amounts from
nuclear facilities
•large measurement chamber
•low detection limits
•display of measurement value in Bq, Bq/g and Bq/cm
•graphic display of activity distribution
•calibration menu for different geometries and densities
•measurement data administration
•fully-automatic or manual feed of measurement material
•24 large area Gamma-plastic detectors to attain
homogeneity judgement
•complete 4π lead shielding
2
Clearance measurement is a proven method to
release materials from nuclear licensed sites for
possible recycling. This provides both an economic
benet as well as a release pathway from the nuclear
licensed site.
The CheckPoint:Waste™ RTM644lnc is a reliable
and fast monitor for release measurement of different
measurement objects such as palettes, waste bags
or grid boxes. User guidance and an easy-to-navigate
menu for materials make work simple and safe.
The RTM644lnc should be operated by instructed
operators only.
health physics
A Mirion Technologies Division
Featuring:
MEASUREMENT PHILOSOPHY
Release strategy and task
Release management allows the recycling of material
(such as machine parts, concrete rubble, cables,
tubing, metal sheets or insulator material). Hereby the
role of clearance measurement stations (CMS) is to
conrm the adherence to clearance criteria for large
quantities of materials.
Job definition fundamentals
It is the responsibility of the regulator in cooperation
with the industry to develop accepted release criteria
depending on the release path and the intended
destination. Clearance measurement provides
conrmation regarding the contamination or activity
of a measured material in the required nuclide
specic limits.
Clearance measurement principle
The correct operation of a clearance measurement
station is based on calibration. Thereby activities in
the measurement material matrix are related to the
measurement response of the system. The shielding
effects and the shape (geometry) of a measurement
item has to be taken into account. The importance
of this subject increases if large masses are to be
handled.
Consideration of all nuclides with their limits, even if
the CMS is capable to measure gamma nuclides only,
is also an important feature of any CMS.
RADOS CMS brief (RTM644lnc)
The RTM644lnc measurement system operates
geometry-oriented. That means the user selects a
measurement object and its lling level. Depending
on this geometry and the weight (provided by
an integrated scale), the RTM644lnc selects the
appropriate calibration for measurement. Material
type and disposal target have to be selected by the
user.
The performance of the RTM644lnc can be
congured to serve customer specic disposal
pathway requirements.
A link-up to a customer specic material control
system is possible.
Waste assignments for nal disposal when
applying release measurements (from 100 % total mass of material)
2 %
Waste for
nal disposal
6 %
Recycling after
reprocessing
92 %
No restrictions
MONITOR DESCRIPTION
The RTM644lnc is a clearance measurement station
consisting of a measurement chamber with motor-
operated swing door(s) and chain conveyor. Materi-
als are checked for gamma radiation in the shielded
measurement chamber. The conveyor system is
used as a carrier for the measurement material. The
evaluation and display of measurements is carried
out by a measurement PC with a real-time operat-
ing system. A PLC is used for the control of the door
as well as of the chain conveyors. The control of the
motors and the signals is realized in dependence to
the inputs from motors and switches on end points.
Layout of the 24 Detectors
The measurement chamber features an array of 24
detectors arranged in a 4π geometry. All detectors
are covered in a robust aluminium housing with their
high voltages and discriminator thresholds controlled
by the computer operating
system
12
12
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Detector-layout
Options
2nd door with additional conveyor, increased shield-
ing, container tted unit, and ofce container are only
a few of many available options for the RTM644lnc.
for material
l rear r
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hol
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hul
hul
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urh
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ulv
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vul
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vul
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vul
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vol
vor
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l front r
l front r
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