Featuring:
radiation monitoring
systems
A Mirion Technologies Division
SGLM 201K
Special Monitors
SGLM 201K
Steam Generator Leak Rate Monitor
The SGLM 201K forms part of the RAMSYS product
line. It has been developed for steam generator leak
rate monitoring. The 16N count rate is measured by a
scintillation detector (NaI).
The detector is installed in close proximity to the main
steam line and it is thermally insulated to protect it
from sharp temperature transients. The conversion
from 16N count rate to volumetric activity is done
utilizing coef cient established through Monte Carlo
analysis.
The conversion from 16N volumetric activity to leak
rate (in GPD) is calculated using four correlations. The
correlations are derived by thermohydraulic transport
analysis based upon data provided by the user.
APPLICATIONS
• Barrier leak control
○ Secondary circuit monitoring
RELATED MONITORS
• SGLM 202K: version with lead shield for WWER
nuclear power plants
FEATURES
●
16
N monitoring when reactor power exceeds 25%
● Gross gamma energy monitoring when reactor
power < 25%
● Spectrum stabilization against temperature and aging
drifts
● 16 con gurable windows over the measurement range
● 1024 channels analysis
● Available with or without display and local signaling
● Seismically quali ed
● More than 500 SGLM channels in operation worldwide
● De ned for mild environment conditions
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
SGLM 201K
Special Monitors
PHYSICAL CHARACTERISTICS
● Radiation detected: gamma
● Detector: 3”x2” NaI(TI) scintillator + PMT
● Energy range:
○ 16
N window: 4.5 MeV to 7 MeV
○ Gamma window: 0.2 MeV to 2.2 MeV
● Measurement range:
○ Leak rate: 1 to 5 000 l/h
(6 to 31 700 GPD)
○ Gamma: 0.5 to 100 000 cps
● Spectrum analysis: 1024 channels
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
● TID: 100 Gy (10
+4
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: 305 mm x 270 mm x 452 mm
(12 in x 10.6 in x 17.8 in)
● Weight:
○ Processing unit: 8 kg (17.6 lb)
○ Detector: 17 kg (37.5 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
● Seismic: IEEE344 and IEC60980
● EMC: 2006/95/CE, 2004/108/CE, EPRI 102323, MIL
STD 461 E, 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: from 20 m (65.6 ft)
to 100 m (328 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
● Seismic quali ed wall mounting bracket for LP(D)U
● Seismic quali ed detector support
www.mirion.com
144429EN-F
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