Mirion Technologies NGM 204S User Manual
NGM 204S
Particulate, Gas & Iodine Monitors
NGM 204 S
Low Range Noble Gas Monitor
The NGM 204S monitor from the RAMSYS product
line has been developed to sample air in discharge
stacks or ventilation ducts. The dual silicon diode
detector integrated in a 4 π/5 cm (4 π/2 in) lead
shielded sample volume guarantees high reliability of
the measurements. The rst silicon diode detects the
beta/gamma radiation from sample volume and the
gamma ambient radiation (background). The second
one detects gamma radiation from the sample vo-
lume and the gamma ambient radiation. This allows
noble gas beta measurement with dynamic gamma
compensation by the processing algorithm.
FEATURES
● Dynamic gamma radiation compensation
● Calculation of the total released activity through a stack
ow rate signal provided
● Compact and reliable
● 1E quali cation and embedded safety related software
● RG 1.97 compliance
● Available under 10 CFR 50 App. B, IEC 61226 and
ASME NQA-1 programs for safety related application
APPLICATIONS
• Effl uent release monitoring
○ Stacks, etc.
• Radioprotection of workers
○ Containment atmosphere
○ Control room air, etc.
• Post-accident operations
○ Containment atmosphere
○ Stacks, etc.
RELATED MONITORS
• NGM 204L: “light” version
• PING 206S: version with particulate and iodine
• PNG 206S: version with particulate
• PIS 203S: accident range particulate and iodine
sampler
• NGM 203S: high range noble gas monitor
radiation monitoring
systems
A Mirion Technologies Division
Featuring:
NGM 204S
Particulate, Gas & Iodine Monitors
PHYSICAL CHARACTERISTICS
● Radiation detected: beta and gamma
● Detector: dual large area silicon
● Sampling chamber: 300 ml (300 cc)
● Typical energy windows:
○ Beta: 80 keV to 2.5 MeV
○ Gamma: 80 keV to 2.5 MeV
● Typical measurement range:
○ 85
Kr: 3.7 10+4 to 7.4 10
+13
Bq/m3
(10-6 to 2 10+3 μCi/cc)
○ 133
Xe: 3.7 10+4 to 3.7 10
+12
Bq/m3
(10-6 to 10+2 μCi/cc)
ENVIRONMENTAL CHARACTERISTICS
● Long term temperature:
+10°C to +40°C (+50°F to +104°F)
● Periodic temperature:
-5°C to +55°C (+23°F to +131°F)
● MTBF: > 20 000 hours, with preventive maintenance
● TID: 100 Gy (10
+4
rad)
PNEUMATIC CHARACTERISTICS
● Standard ow rate: 35 l/min (1.24 scfm)
● Pressure drop: according to the lter dust loading
MECHANICAL CHARACTERISTICS
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: IEC60761
● Environmental: IEC60780, IEEE323, RG 1.97
● Seismic: IEC60980, IEEE344
● EMC: 2006/95/CE and 2004/108/CE, EPRI 102323,
MIL STD 461 E, IEC61000-6-2 and IEC61000-6-4
VERSIONS
● 230 Vac or 230 Vac + 400 Vac 3Ø or 120 Vac
+ 400 Vac 3Ø
● Solenoid check sources
● PIS sampler
● Dust lter holder
● Gas grab sampler ports
ACCESSORIES
● Local & remote display units
● Calibration tools
● Software
● USB converters
● Dimensions: 1305 mm x 830 mm x 680 mm
(51.4 in x 32.7 in x 26.8 in)
● Weight: ~ 310 kg (~ 684 lb)
● Color: gray RAL 7030 (decontaminable paint)
● Inlet tube connection: Ø 12 mm OD (1/2 in)
● Outlet tube connection: Ø 12 mm OD (1/2 in)
ELECTRICAL CHARACTERISTICS
● Power supply: refer to possible versions
● Data link outputs: 1 RS232 and 2 isolated RS485
● Alarm relays: 3 SPDT relays
● I/O: 2 isolated analog outputs (0/4-20 mA)
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
www.mirion.com
144108EN-F
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
Since norms, speci cations and designs are subject to occasional change, please ask for con rmation of the information given in this publication.
Mirion, Mirion Technologies and MGP Instruments are trademarks and/or registered trademarks of Mirion Technologies, Inc. and/or its a liates in the United States and/or other countries.
All other trademarks are the property of their respective owners.
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