Mitsubishi Selected to Provide Water Jet Peening Services at the Callaway and
Wolf Creek Nuclear Power Plants
Arlington, VA, June 19, 2013 - (JCN Newswire) - Mitsubishi Nuclear Energy
Systems, Inc. (MNES) has been awarded contracts at two nuclear power plants to
provide its state-of-the-art water jet peening (WJP) services.
The service will be provided to Wolf Creek Generating Station, located near
Burlington, Kansas, and Ameren Missouri Callaway Energy Center in Callaway
County, Missouri. The WJP service will mitigate the potential for stress
corrosion cracking of essential Alloy 600 components and associated weld
metals, thus providing safety benefits and long-term cost savings to the
ratepayers and utilities.
MNES will be responsible for overall project management, working with its
parent company Mitsubishi Heavy Industries (MHI); with AZZ WSI, a specialty
contractor based in Norcross, Georgia; and with Structural Integrity Associates
Inc. (SI). MHI will provide the specialized tooling and equipment necessary to
complete the projects while AZZ WSI and SI will perform the on-site
implementation work. SI will also provide engineering and licensing support.
The WJP work at both facilities is currently planned for 2016.
"These contracts for water jet peening are indicative of the growing
awareness by U.S. utilities of the effectiveness of the WJP process and its
ability to mitigate stress corrosion cracking," said Makoto Toyama,
President and Chief Executive Officer of MNES. "This contract will draw on
Mitsubishi's experience with this technology and its application. Water
jet peening is a proven technique for prolonging the life of key components at
operating nuclear power plants and will be of great benefit to utilities and
their ratepayers in the United States."
The WJP process is used to modify material stress in important nuclear plant
components and has been used successfully by Mitsubishi in 45 applications on
21 pressurized water reactors in Japan. Mitsubishi has developed the necessary
technologies for testing and for contingency
repairs. Mitsubishi also operates a complete training center in Japan for WJP
A key advantage of WJP is that the entire process can be conducted underwater
and uses only high-pressure water. No foreign materials are introduced into the
reactor and no heat is applied to the material. The easy-to-operate equipment
can be controlled remotely, allowing the procedure to be performed with low
occupational doses. The work will be performed when the reactor is shutdown
during a planned refueling outage.
"The water jet peening process provides an interior surface mitigation
approach for reactorvessel nozzle-dissimilar metal welds," said Rich
Clemens, Vice President Strategic Projects for Wolf Creek. "This is a
preferred approach due to our plant's configuration and radiological
conditions. Working together with Ameren Missouri is logical due to the common
design of the Wolf Creek and Callaway plants. Additionally, we will be able to
concurrently perform, within a reasonable outage schedule, WJP mitigation on
the reactor vessel nozzles as well as on other less susceptible materials and
welds located in the lower region of the reactor vessel. We have confidence
that the process will provide mitigation of potential stress corrosion
"We are excited to pursue application of this innovative water jet
peening process," said Cleve Reasoner, Vice President of Engineering at
the Ameren Missouri Callaway Energy Center. "After extensive review of all
options, we are confident that WJP provides Callaway with the best technically
robust and efficient means to eliminate a known nuclear safety risk. We look
forward to this partnership with Wolf Creek and the MNES team as we improve
nuclear safety while reducing radiological dose, improving reliability, and
increasing shareholder value."
"AZZ WSI is very pleased to be working with MNES / MHI on this important
project," said Doug Jacobs, General Manager and Senior Vice President of
AZZ WSI Nuclear Services. "We are excited about teaming with MNES / MHI on
bringing this established water jet peening technology to the U.S. fleet. This
technology is yet another tool to mitigate Alloy 600 material risk and
complements WSI's Alloy 600 mitigation techniques and specialty services
that we have been providing to the global commercial nuclear fleet."
About Mitsubishi Nuclear Energy Systems
Mitsubishi Nuclear Energy Systems (MNES) is a designer of America's next
generation of clean air nuclear energy generating stations and is an emerging
leader in nuclear energy services. MNES was established in 2006 by Mitsubishi
Heavy Industries, Ltd. (MHI), as the supplier for Mitsubishi nuclear
technologies in the United States. From its headquarters in Arlington, VA, MNES
is leading the way for safer and more reliable nuclear energy. For more
information, please visit www.mnes-us.com.
About Wolf Creek Generating Station
Located in Coffey County, Kansas, Wolf Creek Generating Station is
Kansas' only nuclear power plant. Wolf Creek Generating Station has been
safely providing clean, carbon-free energy to the citizens of Kansas and
Missouri since 1985. The plant generates about 1,200 megawatt of electricity,
which is enough energy for approximately 800,000 homes.
Ameren Missouri has been providing electric and gas service for more than a
century, and the company's electric rates are among the lowest in the
nation. The company serves 1.2 million electric and 127,000 natural gas
customers in central and eastern Missouri with a mission to meet their energy
needs in a safe, reliable, efficient and environmentally responsible manner.
The company's service area covers 63 counties and more than 500 towns,
including the greater St. Louis area. The Ameren Missouri Callaway Energy
Center has been providing safe, clean and affordable electricity since 1984.
The electricity generated by the Callaway Energy Center is enough to meet the
needs of 780,000 average households annually. For more information, visit
About AZZ WSI LLC
AZZ WSI (formerly known as Aquilex WSI) headquartered in Norcross, GA, is a
leading global provider of critical recurring and commonly nondiscretionary
maintenance, repair and overhaul services to a diverse base of customers in the
nuclear, fossil power, refining, chemical processing, pulp and waste-to-energy
industries. AZZ WSI's proprietary processes and highly engineered
technology solutions provide unique life extension options for critical plant
components utilizing automated equipment and a specialized workforce. AZZ WSI
is a whollyowned subsidiary of AZZ Inc., headquartered in Fort Worth, TX.
Structural Integrity Associates Inc. is an internationally recognized
engineering consulting company in the prevention and control of structural and
mechanical failures, with a strong presence in the power generation industry.
With headquarters in San Jose, CA, Structural Integrity serves clients
worldwide through branch offices located throughout the United States and
Canada, as well as through affiliates located in China, Japan, Korea, and
Spain. Structural Integrity's engineering expertise encompasses a broad
range of issues critical to the success of nuclear, fossil and combined cycle
power plants, as well as oil and gas pipelines.
Copyright 2013 JCN Newswire. All rights reserved. www.japancorp.net
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