Mirion Technologies ULMS - Manual

Featuring:
radiation monitoring
systems
A Mirion Technologies Division
ULMS
Nuclear Island Measurement Systems
ULMS
Ultrasonic Water Level Measuring System
The ultrasonic level measurement channel forms part
of the NIMSYS product line. It is used during the
nuclear power plant outage to monitor the real level
of water in the reactor via the primary pipe.
The main application is to avoid the vortex cavitation
of the pump, and to optimize duration time for main-
tenance of the steam generator for example.
Its design makes it easy to install and limit the instal-
lation time in the reactor building.
Its design is based on the round-trip time of an ultra-
sonic wave which is refl ected from the surface of the
liquid. It can be easily and quickly installed without
any modifi cation of the plant. The high performance
of the ultrasonic measurement channel is ensured
by the measurement stability and immunity to distur-
bances of the liquid surface.
APPLICATIONS
• Operational process monitoring
VERSIONS
• 500 kHz for casted pipe
• 1 MHz for forged or extruded pipe
FEATURES
● Simple and compact installation
● Immunity to liquid disturbances
● Easy operation and maintenance
● All-digital processing
● Automatic calibration