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a scale model test rig to ensure that
the appropriate test parameters were
used to test a new design concept.
• The acoustic side branch acoustic
mitigation modification was a creative
design that effectively mitigated
the high pressure oscillations that
developed due to the original standpipe
design.
• This application represents for the
first time a load reducing acoustic
side branch design that has been
successfully tested with in-plant
data to ensure it was a successful
application.
Transferability:
The data collection, benchmarked
scale model testing, and application of
the acoustic side branch modification
are transferable to both BWR and PWR
nuclear power plants.
The current applications of this
groundbreaking work are BWRs that are
planning to increase power and operate
with new steam flow velocities. Every
power uprate application since Quad
Cities has used the data and techniques
to assess the need for mitigation devices
and/or structural reinforcement of critical
steam path components. Three plants
are considering installation of similar
ASB mitigation devices to control high
frequency pressure oscillations at power
uprate conditions.
Exelon has made it a point to inform
and provide the industry with updated
information through the Boiling Water
Reactors Owners Group and the Boiling
Water Reactors Vessels and Internals
Program.
Contact: Keith Moser, Exelon
Nuclear, 4300 Winfi eld Road, Warrenville,
IL 60555; telephone: (630) 657-3878, fax:
(630) 657-4328, email: keith.moser@
exeloncorp.com.
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50 www.nuclearplantjournal.com Nuclear Plant Journal, May-June 2009