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Featuring:
radiation monitoring
systems
A Mirion Technologies Division
SGLM 202K
Special Monitors
SGLM 202K
Steam Generator Leak Rate Monitor
The SGLM 202K from the RAMSYS product line has
been developed for steam generator leak rate
monitoring in WWER nuclear power plants.
The 16N volume activity (in counts per second/Cps)
measured by a NaI scintillation detector inside a lead
shielding facing the live steam line is converted to
Bq/m3 (or µci/cc) through a coef cient calculated
from Monte Carlo analysis on the basis of relevant
data provided by the user. An algorithm which is
based upon thermal hydraulic transport phenomena
modeling uses the measured 16N activity, the reactor
power, the steam ow rate and the transport time
(in the primary and in the secondary loop) to assess
the steam generator leak rate.
APPLICATIONS
• Barrier leak control
○ Secondary circuit monitoring
RELATED MONITORS
• SGLM 201K: version for PWR 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 selectable windows over the range covered
● 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
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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 202K
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
● Lead shield: 2 π / 5 cm (2 π / 2 in)
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: Ø 402 mm x 429 mm (Ø 15.8 in x 16.9 in)
● Weight:
○ Processing unit: 8 kg (17.6 lb)
○ Detector: 226 kg (498 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
● Detection sub-assembly support
www.mirion.com
144430EN-F
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