Product category:
Energy management; Boiler plant
News Release from: Fluid Conditioning Systems | Subject: Magnom module
Edited by the Processingtalk Editorial
Team on 14 October 2004
Removing micron particles from water
feed lines
A stainless-steel Magnom module introduced at a Westinghouse managed nuclear power plant in the Czech Republic has improved system reliability by removing micron sized solids from the steam feed lines
A stainless-steel Magnom module has improved system reliability in a Westinghouse managed nuclear power station in the Czech Republic The unit was introduced to reduce the failure of various mechanical devices such as valves in the steam line
This article was originally published on Processingtalk on 21 Nov 2005 at 8.00am (UK)
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The Magnom has been installed in the Steam Generator Blow Down sample line at steam generator number 4, in the Temelin Nuclear Power Plant.
The parameters of the water flow in this line are: flow: 12 to 20 l/min, temperature: about 100C; flow pressure: 6.4 to 6.8 Mpa.
The core analysed after a period of service demonstrated that the Magnom had removed a large quantity of debris from the system: prior to the installation of the Magnom this debris (much of it less than a micron in size) would have continued to circulate through the conventional filtration.
This hard and sharp particulate would have been responsible for a chain reaction of wear that would cause erosive wear on all valves and static parts of the system.
The engineer manager of this section of the plant believes that the Magnom has substantially improved the operation of the specified sample line.
Many power plants have boilers (steam generators) to convert water to steam.
The steam passes through the steam turbine that drives the electrical generator, then is condensed back to water and returned to the steam generator to be converted to steam again.
The water has high quality chemistry, but inevitably builds up dissolved solids during the process.
If the level of total dissolved solids (TDS) exceeds the recommended level, sludge and scale can be precipitated in the steam generator.
Also water foaming can occur in the steam generator and water can carry over into the process.
To keep the TDS within limits, part of the water is "blown down" (drained) from the steam generator (periodically in some plant, continuously in others) and the water is made-up with high quality water.
This is an area of great interest to power plant owners and operators on the grounds of efficiency (energy is wasted by the blow down process, but the steam generator then operates more efficiently) and safety (particularly in nuclear plants, where the whole steam generation process is strictly controlled).
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