Level & Flow instruments comply with highest nuclear spec
06 January 2010
The interest in Nuclear Power as a competitive and viable energy source has focused the attention of design engineers, plant engineers and operators in improving plant performance for new, existing and re-licensed nuclear power facilities worldwide.
The next generation of nuclear power plants will achieve even greater efficiencies, lower operational costs, reduced maintenance and most importantly, improved safety.Among the key components playing an important role in improved safety and greater efficiency in these plants are flow and level instruments and these need to meet the unique and challenging demands associated with nuclear power generation. To meet these demands Allison Engineering offer a range of FCI thermal dispersion flow and level instruments which are claimed to be the only thermal dispersion devices with both the Nuclear IEEE Cat.1E accreditation and SIL2 compliance.
In the UK, Allison Engineering has supplied FCI level solutions for both Radwaste interface (radioactive waste slurry interface) and sump level applications. Worldwide, FCI level and flow instruments are installed in over 115 nuclear power plants and these are operating on over 30 different applications including, analyser sampling systems, flood alarm, turbine water level, chemical injection, pump protection, condenser off gas flow and reactor core coolant.
With their experience and the ongoing commitment to the nuclear qualifications of their instruments, Allison offer flow and level solutions for a variety of new-build and decommissioning applications.
Fundamental to FCIs' thermal dispersion technology is a probe which has two thermowell protected platinum RTD temperature sensors in the process stream. One RTD is heated while the other senses the actual process temperature. The temperature difference between these sensors is measured, which is directly proportional to mass flow. From this reading, a variety of outputs can be provided, including simple level/flow switching, multi-point level and gas mass-flow.
The FCI Thermal dispersion design offers fast response, high accuracy and repeatability. With no moving parts, it is virtually maintenance free, saving time and money and is inherently multivariable, measuring both flow/level and temperature.
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