Mirion Technologies NIM 201K User Manual
Featuring:
radiation monitoring
systems
A Mirion Technologies Division
NIM 201K
Gamma & Neutronic Monitors
NIM 201K
Neutron Irradiation Dose Rate Monitor
The NIM 201K forms part of the RAMSYS product
line. It has been developed to monitor in real time the
ambient dose equivalent rate. It provides operatio-
nal dose rate in units of H*(10) derived from neutron
uence according to ICRU 57 recommendations. The
helium-3 proportional counter (cylindrical tube) pla-
ced inside a polyethylene sphere facilitates detection
of thermal and fast neutrons. Its large energy range,
associated with modular design makes it ef cient,
reliable and very sensitive. It is used effectively in nu-
clear reactors, subcritical stacks, neutron generators
and irradiators, and in accelerator facilities.
APPLICATIONS
• Radioprotection of workers
RELATED MONITORS
• Complement to the entire GIM range
FEATURES
● Detector for indoor and outdoor applications
● H*(10) measurement
● Available with or without display and local signaling
● Wide and high neutron energy range (2.5 10
-8
to 16 MeV)
● Compact and reliable
Since norms, speci cations and designs are subject to occasional change, please ask for con rmation of the information given in this publication.
Mirion Technologies (MGPI) SA
Route d’Eyguières
FR-13113 Lamanon
France
T +33 (0) 4 90 59 59 59
F +33 (0) 4 90 59 55 18
Mirion Technologies (MGPI) Inc
5000 Highlands Parkway
Suite 150
Smyrna, GA 30082
USA
T +1 770 432 2744
F +1 770 432 9179
Mirion Technologies (MGPI H&B) GmbH
Landsberger Strasse 328a
DE-80687 Munich
Germany
T +49 (0) 89515 13-0
F +49 (0) 89515 13 169
Mirion Commercial (Beijing) Co., Ltd.
Shanghai Jiangchang Commercial Branch
Room 801, 78 Jiangchang SanLu
Zhabei District, Shanghai 200436
PR of China
T +86 21 6180 6920
F +86 21 6180 6924
NIM 201K
Gamma & Neutronic Monitors
PHYSICAL CHARACTERISTICS
● Radiation detected: neutron
● Detector: He3 proportional counter
● Energy range: 2.5 10
-8
(thermal) to 16 MeV
● Typical measurement range: 10
-6
to 0.1 Sv/h
(10-4 to 10 rem/h)
● Measurement capability: 10
-7
to 0.3 Sv/h
(10-5 to 30 rem/h)
ENVIRONMENTAL CHARACTERISTICS
● Long term temperature:
+10°C to +40°C (+50°F to +104°F)
● Periodic temperature (processing unit):
-5°C to +55°C (+23°F to +131°F)
● Periodic temperature (detector):
-5°C to +70°C (+23°F to +158°F)
● MTBF: > 20 000 hours
● TID (processing unit): 100 Gy (10
+4
rad)
● TID (detector): 5 10
+3
Gy (5 10+5 rad)
● Protection index: IP65 and IK07
MECHANICAL CHARACTERISTICS
● Dimensions:
○ Processing unit: 390 mm x 196 mm x 187 mm
(15.3 in x 7.7 in x 7.3 in)
○ Detector: 817 mm x 312 mm x 310 mm
(32.2 in x 12.3 in x 12.2 in)
● Weight:
○ Processing unit: 8.5 kg (18.7 lb)
○ Detector: ~ 31 kg (~ 68.3 lb)
● Color: gray RAL 7030 (decontaminable paint)
ELECTRICAL CHARACTERISTICS
● Power supply: 230 Vac – 50 Hz or 120 Vac – 60 Hz
● Data link outputs: 1 RS232 and 2 isolated RS485
● Alarm relays: 3 SPDT relays
● I/O: 2 isolated analog outputs and 1 isolated analog
input (0/4-20 mA)
SIGNALING (Applicable to LPDU only)
● Alphanumeric display: measurement, status…
● Sound alarm: buzzer 90 dBA at 1 meter
● Visual alarm: 3 lights (red, yellow, green)
REFERENCE STANDARDS
● Nuclear: IEC61005 and IEC61322, ICRU 57
● EMC: 2006/95/CE and 2004/108/CE, IEC61000-6-2
and IEC61000-6-4
VERSIONS
● 230 Vac or 120 Vac
● LPDU or LPU
● With or without RS485 junction box
● Detector cable length: 2 m (6.5 ft) to 5 m (16.4 ft)
● Junction box cable length: 2 m (6.56 ft), 5 m (16.4 ft)
or 10 m (32.8 ft)
ACCESSORIES
● Calibration tools
● Software
● USB converters
www.mirion.com
144423EN-E
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