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Detectors and input signals, In-core self-powered neutron detectors, Detector supply: not needed – Mirion Technologies DLK 250 User Manual

Page 2: Immediate step response in the range 0, Simple and rugged algorithm output signals, Calibrated to reactor power, e.g. 0 %pn, Substitute signal for a faulty detector, Mechanical vibrations: < 5 g, 5 hz

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Since norms, specifi cations and designs are subject to occasional change, please ask for confi 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

DLK 250

Neutron Flux Instrumentation

www.mirion.com

144968EN-C

DETECTORS AND INPUT SIGNALS

In-core self-powered neutron detectors

Signal cables to DLK 250: two coaxial cables per
detector, no limitation of length

Detector supply: not needed

Measuring range for the input current: 0,1 μA ... 1 μA
for full scale

Option: integrated transmitter for monitoring the fuel
output temperature

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

FILTER ALGORITHM

Digital fi lter for the suppression of signal fl uctuations

Low pass fi lter 1st order with tolerance-intervall-com-
parator for fast signal response

Signal fi lter with adjustable time constant truly follow-
ing the mean value in the tolerance intervall ± ∆

Immediate step response in the range 0...1-∆

Simple and rugged algorithm

OUTPUT SIGNALS

Neutron fl ux for each detector position and average
neutron fl ux signal

Calibrated to reactor power, e.g. 0 ... 125 %Pn

Substitute signal for a faulty detector

Analog outputs: 0/4 ... 20mA/600 Ω, insulated

Binary outputs: insulated relay 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)

DLK 250

front view