Mirion Technologies DWK 250 User Manual
Featuring:
radiation monitoring
systems
A Mirion Technologies Division
DWK 250
Neutron Flux Instrumentation
DWK 250
Digital Wide Range Channel
The DWK 250 digital wide range channel forms part
of the proTK™ product line. It has been designed for
neutron ux monitoring combining pulse and inter-
mediate range in combination with only one detector,
e.g. in-core or ex-core wide range ssion chamber.
Hardware and software of the DWK 250 are designed
and quali ed for applications at the level of the reac-
tor protection system.
APPLICATIONS
• Operational process monitoring
○ Safety related signal processing for neutron ux
monitoring combining pulse range and intermediate
range
RELATED PRODUCTS
• Neutron detectors: e.g. wide range ssion
chambers
• Digital signal processing channels: e.g. for pulse
range or power range monitoring
FEATURES
● 10 to 12 decades of measurement range with one
detector only
● Calibration into neutron ux units (nv, P/Pn)
● Filtering of the signal with an adaptive time constant
● Calculation of the relative ux change rate (reciprocal of
the reactor period) for the whole wide range
● Generation of analog and binary signals for the reactor
protection system
● Remote test signal generators, even in the preampli er
● The correct function of all signal pathes can be tested
before start-up
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
DWK 250
Neutron Flux Instrumentation
www.mirion.com
144970EN-C
DETECTORS
● Wide range ssion chambers, e.g. WSK 61 (AREVA
NP), or CFUG 08 (Photonis)
● Cable length to the preampli er: up to 100 m (328 ft)
● Detector supply: 0 ... 500V/4mA or 0 ... 800V/30mA
PREAMPLIFIER
● Input and output impedance matched to the cable
impedance
● Remote operated test signal generator
● Short term operation (max. 3 h) up to 100°C (212°F)
DIGITAL SIGNAL PROCESSING
● 80C31/32 multi-processor system
● Program memory: EPROM
● Parameter memory: CMOS-RAM with integrated
Li-battery
● Data interface: RS232 and/or RS485
● Internal LC-display: 2 x 16 characters
OUTPUT SIGNALS
● Linear pulse count rate, e.g. 0 ... 5e5 cps
● Linear RMS signal with automatic range selection,
e.g. 0 ... 40/125 %Pn
● Logarithmic wide range signal, e.g. 1e3 ... 1e13 nv
● Neutron ux change rate = 1 / reactor period,
e.g. -1.25 ... 0 ... 12.5 %/s corresponding to
-80 ... ∞ ... +8 s reactor period
● Analog outputs: 0/4 ... 20mA/600 Ω, insulated
● Binary outputs: insulated relays change overs
60V/0.5A or 125V/1A
OTHER CHARACTERISTICS
● DC power supply: 18 ... 33 VDC, approx. 1.6A at 24 V
● Optional: AC power supply: 230 VAC or 115 VAC
+10%/-15%, approx. 40 VA
● Operating temperature: 0 ... 70°C (32 ... 158°F) for the
main electronics
● Mechanical vibrations: < 5 g, 5 ... 100 Hz
● 19” modular system according to IEC 60297
● Rack size (W×H×D): 483 mm × 133 mm × 280 mm
(19 in x 5.2 in x 11 in)
● Plug-in boards: 100 mm × 160 mm (3.9 in x 6.3 in)
DWK 250 schematic diagram
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