Automated Welding System
leading developer and provider of flexible automation solutions to applications as
diverse as nuclear welding and semiconductor wafer handling. Throughout its 25 year history, Berkeley has
approached machine control as a discipline. Company capabilities include multidisciplinary engineering expertise
to deliver motion, process, and turnkey machine solutions. To learn more, visit http://www.berkeleyprocess.com/
Automated Welding System
dry storage container
2007 Reference
Automated Welding System
Automated Welding System
Monitored by a qualified welding operator, the Berkeley
Automated Welding System (AWS) performs tungsten inert gas
(TIG) weldingoptionally hot wire TIG weldingand plasma cutting,
as part of a system for nuclear dry fuel storage (DFS). Unique
among dry storage container (DSC) welding systems, the AWS
integrates comprehensive machine and welding process automation
to reduce radiation exposure of personnel, deliver weld quality and
consistency, and enhance productivity.
The AWS enables workers to efficiently perform all normal DSC
welding steps remotelyup to 100 feet from the container, and
clear of radiation exposure hazards. Importantly, AWS capabilities
include noncircumference weldsincluding straight test coupons,
keyways, linear seams, and vent and siphon portsdramatically
reducing personnel time and exposure at the container.
The AWS brings a high degree of automation to the tasks of
DSC weld closure. The welding engineer, addressing container
specific welding requirements and personal preferences, readily
optimizes AWS factory preprogrammed parameters, operational
steps, welding sequences, and welding recipes. The optimized
parameters are stored within the AWS, for fast and accurate reuse.
Captured best practice expertise and what worked well are the
starting point for the next DSCweld consistency and quality are
enhanced.
With advanced realtime welding process control, the AWS
performs the welding. It automatically tracks the weld pathwith
the operator monitoring, and making only small on the fly adjust
ments for weldinggenerated distortions or DSC manufacturing
variances.
A staff of just twoan operator and helperefficiently seal dry
storage containers with the AWS. AWS realtime machine and
welding process control, implementing onboard recipebased
welding routines, reliably and repeatably produce welds of the
highest quality. Welding with the AWS is very efficient, and therefore
fast. And automation reduces the risk of costly human errors.
Greatly reduces worker radiation exposure
uniquely supporting the ALARA principle
Leverages skills of welding staff to produce
the highest quality dry storage container
(DSC) weld closurestime and time again
Improves productivity
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Seven Key Advantages
of the Berkeley Automated Welding System
fewer operators
·
Only two individualsone operator and one helperare
needed to effectively utilize the Berkeley Automated Welding
System.
reduced exposures
·
The AWS need only be placed within a few inches of the center
of the dry storage container (DSC) cover. This is achieved by
remote crane. Worker radiation exposure is minimized.
·
Supported by comprehensive automation and twocamera weld
viewing, AWS operators have no need to be within sight of the
DSC during setup or welding operations. Theyre safely up to
100 feet away, monitoring AWS operation.
increased process automation
·
The Berkeley AWS is highly automatedthe operator monitors
automated welding, needing only to provide small realtime
adjustments to deal with distortions caused by the welding
process or DSC manufacturing variances.
·
A uniquely powerful set of capabilities is enabled by the AWS
comprehensive automation. They include:
·
Teaching all weld seam pathsa no dose alternative
to exact physical centering of the welder on DSC cover. It
enables handsfree automated welding.
·
Welding straight test coupons, and all seams on Holtec
MPC and other major DSC types.
·
Preprogrammed steps: tack, root, fill, penetrations, visual
inspections.
·
Preprogrammed operations: weld test coupons, dry runs,
inner cover, siphon and vent, outer cover.
·
Short time to start next weld passonly seconds.
·
Welds automatically tieroot pass to tack, passtopass.
·
Oscillation with precisely coordinated, programmable
current, pulsing.
·
Automated error and exception handling, and recovery.
recipebased welding
·
Numerous parameterssuch as those dealing with weld start
sequence, wire feed schedule, weld and process values, and
oscillationare userconfigurable, and are stored in the AWS
as part of a complete recipe for DSC closure.
·
Functional DSC welding recipes supplied with the AWS provide
a starting point for local welding engineer preference expres
sion and optimization.
·
The AWS recipebased welding enables the development of
welding engineer optimized, local needs optimized, DSC
closure processes. Recipes may be precisely tuned, then
precisely repeated from DSC to DSC.
·
Precisely repeated welding parameters result in repeatable
shell shrinkagecovers are easily installed, and fitup grinding
is reduced.
·
The welding operator needs only to progress through and
complete each of the preprogrammed steps within a welding
program to seal a DSC.
greater weld quality, consistency
·
Look to any industrial process where quality and consistency
are critical and you will find high levels of process automation. It
takes human experts to develop and refine a process, but auto
mated machines are better at flawlessly repeating that process.
The closure of spent fuel DSCs is an industrial process that
requires quality and consistency.
·
Through comprehensive machine and welding process automa
tion, born from Berkeleys breadth of controls and automation
experience, the AWS brings high levels of welding process
control to DSC closure. That process control drives quality and
consistency.
greater productivity
·
Only a staff of two are needed to efficiently utilize the Berkeley
AWS.
·
The AWS is highly automatedoperators remotely monitor its
automated welding.
·
The AWS seamlessly integrates welding machine and process
automation to provide superior welding process control.
·
The AWS features onboard recipebased welding. A proven
DSC welding recipe can be repeatedly employed.
·
AWS automation reduces the risk of costly human errors.
robust and reliable
·
The AWS reflects Berkeleys automation design approach and
considerable industrial automation control experience. Me
chanical designs reflect a thorough understanding of automa
tion controlshow they can be utilized to simplify mechanisms,
making them more reliable, while enhancing capabilities.
·
Simple, robust design virtually eliminates hardware failures and
the subsequent exposures associated with repairs.
·
The AWS has earned an industry reputation for exceptional
reliability, backed by responsive Berkeley support.
The AWS consists of:
The control console provides the AWS system interface to the welding
operator, and can be located up to 100 feet from the welding machinekeeping
the operator safely remote from radiation and welding health hazards.
All machine setup and machine operation is performed from the control
consoles touchscreen display, and its taskoptimized displays and controls.
Dedicated safety switches, and torch and wire positioning switches, provide
additional operator control input.
Two video monitors continuously display torch tipleading and tiptrailing
CCD camera videofor setup, welding, and inspection.
The TIG welding power supply rides on a cart that also carries the inert
shielding gas cylinder (customer supplied), and camera/torch water
cooler. The welding power supply is entirely controlled from the control
console via a single cable connection. The water cooler provides cooling for
the torch and both CCD cameras.
Welding machine shown with optional
Hot Wire TIG welding capability and
remotely controlled wire manipulator.
The robustly built welding machine provides precise 5axes robotic torch positioning,
wire feed control, and wire position manipulation (optional). Thanks to AWS weld path
teaching capabilities it need be only approximately centered on the DSC coverreducing
operator time in proximity to the DSC, and consequent exposure.
Highquality leading and trailing CCD cameras, with associated highintensity lighting,
provide excellent electrode/puddle images to the welding operator at the remote control
console. Camera operation is fully automatic, requiring no operator adjustment.
AWS Hot Wire TIG welding dramatically increases deposition
rate, without compromising the ability to produce welds of
meticulous quality. This new option enables the Berkeley AWS to
rapidly weld all common dry fuel storage DSC typeswhile still
requiring only a single operator and a helper.
In hot wire operation, the AWS energizes and preheats the filler
wire prior to its contact with the weld puddle. Taking place in an
inert gas (argon) environment, the hot wire enters the puddle
cleanfree of hydrogen and oxides. This enables operators to
produce strikingly clean looking welds.
The AWS Hot Wire design uniquely avoids a deficiency com
mon in other hot