Moisture Separator Reheaters
Always one step ahead:
For many decades now Balcke-Dürr moisture separator reheaters
(MSRs) have been setting benchmarks world-wide in terms of
efficiency, reliability and quality workmanship. As pioneers in
technological development, we supplied the MSRs for one of the
first German nuclear power plants in 1968. Since then most of the
nuclear power plants in Germany as well as numerous international
sites have been equipped with our MSRs.
By fitting out the first European Pressurized Water Reactor
(EPR), we are accomplishing our declared aim of always tailoring
the design of our MSRs to tomorrow‘s requirements. The MSRs
developed for the EPR are therefore not only the world’s largest
and longest-lasting but are also equipped with the most advanced
separation technology, namely “Powervanes”. Upstream “Power
seps” ensure optimal component protection.
Our product range based on proven, practical designs
covers all the conventional types of construction: MSRs
in vertical or horizontal configuration with single or two-stage
reheating system. Our comprehensive spectrum of supplies and
services extends from CFD analyses and model tests to design
engineering, manufacturing, erection and commissioning.
Irrespective of the OEM for the MSRs, we develop turnkey
modernization solutions to extend the service life and raise
efficiency. These are always established in close consultation with
3D model of a vertical MSR
MSR technology based on decades of experience
equipment manufacturer for the EPR (European
Pressurized Water Reactor)
designs for vertical and horizontal MSR configurations
by optimizing and replacing fine separators and
component protection thanks to Powerseps installed
separation rates with considerable design reserves
achieved with Powervanes
parts in contact with wet steam made of stainless steel to
ensure erosion and corrosion protection
compensation of all thermal expansion thanks to
themoelastic connection systems
MSR assemblies during manufacturing
component dimensioning achieves vibration
MSR design is critical in view of its direct effect on plant availability.
The MSRs are also subject to highly complex operating conditions
on account of a corrosive two-phase flow on shell and tube side
and considerable load variations.
To cater for these special requirements, we attach great importance
to our MSR design being based on conservative design criteria and
combining both thermo-hydraulically and mechanically optimum
ensure top separating rates with low pressure drop
and high reliability against water carryover. Independent studies
have demonstrated that this high-performance vane used in the
fine separator is by far the most efficient one on the market.
3D model of a horizontal MSR
plates upstream and downstream of the fine
separators ensure homogeneous flow profiles with constant
separating efficiency locally. Deflectors also contribute to an
even distribution and flow-through of steam.
1,300 MW Biblis B nuclear power plant, Germany:
Replacement and erection of the MSRs as part of the power plant
modernization in 2003.
fact that all components coming into contact with wet
CFD analysis of a moisture separator
steam are stainless steel or stainless steel clad means full
protection against erosion and corrosion.
all loads, flexible connection systems guarantee
compensation of the different thermal expansions between
vessel shell and reheater bundle as well as between reheater
tubes and bundle structure.
high degree of vibration resistance is provided by numerous
support plates arranged in the reheater bundle. The tube holes
have rounded edges and tight drill-hole tolerances.
Installation of a new MSR
1,000 MW Gösgen nuclear power plant, Switzerland:
Replacement of reheater bundles and retrofit with four Powerseps
provide a power gain of more than 5 MW (2005).
accessibility to the interior for testing and maintenance
purposes is provided by manholes and inspection openings.
49(0)21 02 16 69-0
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Reheater bundle in the Neubeckum workshop