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HENNIGAN ENGINEERING COMPANY, INC.
Locations Safety Clients Media
55 Industrial Park Road, Hingham, MA 02043-4306 / Boston, MA FAX (781) 740-8738  (800) 472-8484  (781) 749-0220
Hennigan Engineering is a certified Woman Owned USA based company that is
a leader in providing Hydroblasting, Video Inspection, Vacuuming and other
complex Specialty Services to the Nuclear, Fossil Fuel Energy, Marine,
Industrial Infrastructure and other core Industries across the nation and abroad.
The firm was established in 1967 and continues to deliver our Clients the
highest quality and diversity of services in the industry.
Industries Services
Infrastructure inspections are performed by our
TUNNEL VISION division while our affiliate,
HEPCO, supplies specialty Heat Exchanger
Products to the Energy Industry world-wide.
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Industries
Hennigan Engineering provides specialty Services to all
types of industries. Our highly skilled staff utilizes the
State-of-the-Art equipment necessary to deliver our services
but more importantly, to solve unique and complex
problems that do not always fit into a service category
“box”. Our unique ability to design and implement
solutions to complex problems for our Clients is what sets
Hennigan Engineering apart and above other industrial
service companies.
Safety and teamwork in our operations and with our clients
in Locations within the USA and abroad remain the keys to
our success since 1967.
Nuclear
Fossil
Government
Industrial
Marine
Construction
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Services
Heat Exchangers / Chillers
Boiler Cleaning
Pipe & Tank Hydrolase Cleaning
Water Intrusion / Concrete Repair
Surface Cleaning & Coatings
Video Inspection
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Hennigan Engineering provides a variety of services
to all types of Clients and Industries. Most of our staff
is experienced and trained at the Nuclear Power Plant
access level and as such; perform in the field with the
highest degree of operational on-site Safety in the
industry at all times. In addition to our core services,
clients often call upon Hennigan Engineering to
design and implement solutions to problems that are
particularly unique, challenging and complex. It is
this ability that defines the value of our services to our
clients.
Hydrostatic Testing
Tube Plugging
Consulting & Reporting
Hydro-demolition

Project Locations
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U.S. Project Locations
Global Project
Locations
USA Canada Peru Guatemala Puerto Rico
Corporate Office:
55 Industrial Park Road
Hingham, MA 02043-4306
PH: 800-472-8484
info@henniganengineering.com
Canada
Peru
Guatemala
Puerto Rico

Hennigan Engineering understands the
complexity of working in the energy
infrastructure industry, the inherent
dangers that exist and most
importantly; that our employees are our
most important asset. Safety is our #1
focus that resulted in “Zero” OSHA
recordable accidents in the last five
years. We maintain a “zero tolerance”
policy for safety rule violations and we
continue to implement steps to improve
our focus on the “safety attitude”
thereby improving safety records with
regards to OSHA recordable and lost
time accidents.
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Safety
Industries Services
Hennigan Engineering controls our work sites to ensure that unsafe
acts and conditions are minimized. These systems include job-
specific health & safety plans; daily toolbox safety meetings;
weekly safety meetings; safety observer program; periodic audits
done by on-site supervisors, off-site managers and safety staff,
task-specific job analysis and safety improvement branch meetings.

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Locations Safety Clients Media GalleryIndustries Services
Hennigan Engineering has provided significant and specialized infrastructure maintenance, repair and
related Services to a broad spectrum of clients since 1967. To be a successful business for so many years
means that we understand the need to not just establish; but to maintain, cultivate and grow client
relationships. It all begins and ends by understanding our client’s needs and performing to solve their
problems above their expectations of quality, cost and schedule.
“Coming together is a beginning; Keeping together is progress; working together is success”.
Henry Ford
Client Listing

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Publications
Newsletter
Testimonials
Media
“Your crew was perhaps one of the most motivated and well informed contractors of which it has been my
pleasure to work with. Each member of your crew was genuinely concerned about each and every tube.
They understood the scope of the cleaning, the importance of following the cleaning plan and did it with a
degree of professionalism that was truly refreshing…”-PSNH (Public Service of New Hampshire)

Nuclear
Hennigan Engineering Co., Inc. has provided the nuclear industry with the personnel and
specialized equipment necessary to maintain their performance-related equipment at
optimum efficiency since the 1970’s. We work closely with all of our Clients in Locations
throughout the United States and abroad, focusing on preplanning and detail in a
cooperative effort to achieve desired project results with demanding schedules.
Services Gallery
Locations Safety Clients
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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Fossil
Services Gallery
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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As cost control mandates efficiency
at every level of operations, we
augment the needs of the industry
by designing and implementing
innovative cleaning systems, which
employ state of the art equipment to
extract the maximum efficiency out
of every component we service.
Teamwork remains a key factor in
our success, not merely teamwork
within our operation, but teamwork
with our Clients.

Government
Services Gallery
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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We are proud to be a USA Woman Owned business delivering our services to various
branches of the military and other government and municipal entities. We have provided
Services under direct contract with government agencies or as a subcontractor to
consulting firms that have operations all over the globe. We understand that working for a
government agency ultimately means that we are working for tax payers. We understand
what this means to our Clients, do not take these opportunities for granted and we are
proud to serve.

Construction
Services Gallery
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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Hennigan Engineering delivers Services to a wide range of Federal and State
agencies as well as design/build contractor Clients with cost effective surface
preparation, hydrodemolition and coating application services. As our ultra high
pressure water jetting and water blasting process is environmentally responsible and
safe. We have customized our equipment to handle high production jobs where
schedule compliance is critical. 300-800+ horsepower water blast pumping systems
can be accurately dialed in to provide 0-10,000 psi for surface cleaning and
decontamination, 10,000-20,000 psi for concrete cutting and hydrodemolition or
20,000-40,000 psi for coating removal and surface preparation prior to recoating.

Marine
Services Gallery
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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Hennigan Engineering provides specialized marine
Services to Clients that include construction firms,
shipyards, the US Navy and the US Coast Guard. Our
services range from underwater concrete
hydrodemolition to dry dock sheet pile surface prep and
repair. We have supported a wide variety of rehabilitation
and new construction projects. We were honored to
provide surface preparation services (40,000 psi ultra
high pressure water jetting) for the two-time America's
Cup winning 12-meter sailing sloop "Courageous," and
turnkey prep and painting services of the 950' long,
700,000 square foot, heavy sealift vessel USNS Gordon.

Industrial
Services Gallery
Nuclear
Fossil
Government
Industrial
Marine
Construction
MediaIndustries
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Efficiency equals Revenue and cost control mandates efficiency at every level
of industrial operations. Restoring peak equipment performance for our
Clients has always been our standard.
From paper mills to pharmaceuticals and virtually every industry in between,
our Services enable our clients to prosper in a competitive environment. Since
1967, Hennigan Engineering Co., Inc. has provided industry with the
personnel and specialized equipment necessary to maintain their performance
related equipment at optimum efficiency.

Heat Exchangers / Chillers
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Our main focus is to restore and maintain maximum operating Efficiency for every
condenser and heat exchanger we clean. Based on application, condition and
circumstance, we implement cleaning operations by way of high pressure water jetting,
brushes, metal/plastic scrapers or abrasive balls. Based on many years of experience; we
have custom designed our high pressure water jetting systems to perform far beyond the
capability of off-the-shelf equipment. The net result is a package designed to provide
complete 360 I.D. tube cleaning without harming tube base metal. With operating
pressures typically ranging from 10,000 - 20,000 psi, we can effectively remove all
foreign debris, from biological films to calcium/silica or other types of scales. Heat
Exchanger tube plug products are supplied by our sister company, HEPCO (Heat
Exchanger Products Corporation).
Heat Exchangers/ Chillers
Boiler Cleaning
Pipe & Tank Cleaning
Hydrodemolition
Surface Cleaning Coatings
Radiological Decontamination
Video Inspection
Hydrostatic Testing
Tube Plugging
Locations Safety Clients MediaServicesIndustries

Boiler Cleaning
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The use of high pressure water
jetting tools has become standard
practice for thorough furnace
cleaning. Manual and remotely
operated hydrolasing accessories are
utilized at pressures of 8,000 -20,000
psi for the removal of scale, slag and
ash from Superheaters, Water Walls,
Economizers, and Air Preheaters.
Where applicable, water tube
internals can be effectively cleaned
free of chemical and scale deposit
build-up in a manner similar to that
used in our heat exchanger cleaning
process. For safety and insurance
inspections, the use of 30,000 -
40,000 psi rotary water jetting guns
are used to clean water wall welds
and ligaments to white metal for UT
testing (without using abrasive blast
media).
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

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Maintaining the supply and return piping associated with all phases of facility operations
operation is an important task. Innovations in the design of semi-automated high
pressure rotary cleaning nozzles enables Hennigan Engineering to custom build versatile
cleaning systems perfectly suited for the cleaning of any diameter piping. Traditional
pipeline cleaning methods exhibit inherent drawbacks ranging from poor results and low
productivity levels to high cost and environmental concerns. Even hydroblasting methods
utilizing multiple, stationary jets have produced unacceptable levels of "streaking". Our
state-of-the-art self-rotating cleaning nozzles can produce "white metal" levels of
cleanliness (when necessary) from even the most highly fouled conditions, at pressures up
to 20,000 psi. Experienced Hennigan Engineering personnel can "dial in" the optimal
rotation and traverse speeds of our rotary cleaning heads to allow for uniform, full surface
coverage at high productivity rates.
Before After
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

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Hennigan Engineering has enhanced the efficiency of manually operated surface
decontamination operations and developed partial remotely-operated decontamination
systems for work in High Rad areas. We have developed and implemented specialized ICI
Guide Tube flushing equipment, remotely operated Steam Generator Channelhead Decon
systems and designed Cavity Upender Fixture Decon tools. Our specialized equipment
can also be used for tube decon, pipe decon, RHR tube and head cleaning, coating
removal and surface preparation on concrete and steel. Our systems can reduce the
volume of effluent water by 50 percent.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Surface Cleaning & Coatings
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Traditional abrasive blast preparation is becoming
a thing of the past. State and Federal
environmental regulations have created the push
away from abrasive blasting. With the cost of
constructing environmentally sound containment
structures, and disposal cost of abrasive blast
media, alternative techniques are growing in
popularity. Even the United States Navy has
joined in this campaign with the adoption of
written and visual standards for high pressure
water jet surface preparation. The acceptance of
water jetting (10,000 - 40,000 psi) as a preferred
surface preparation technique is not solely a
financial move. Hennigan Engineering Co., Inc.
has the expertise and the specialized equipment to
remove product build-up, dirt, oil, corrosion scale,
and failed coatings down to the substrate and
follow-up with a recommended coating system
application for steel and concrete surfaces.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Hydrodemolition
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Renovation and replacement of deteriorated concrete
bridges, substructures, and roadways are of vital concern
to highway and bridge maintenance personnel. As the
demand for safe and efficient selective demolition work
increases, so does the demand for better methods to
expedite the demolition process. Conventional methods
for removal of deteriorated concrete traditionally include
jack hammering. There are obvious disadvantages to
using jack hammers in concrete demolition; the jack
hammer method is time consuming and, therefore, costly.
Excessive dust, noise pollution, as well as other obvious
safety factors are a constant concern for all involved. Not
so obvious disadvantages to jack hammering include:
• Unnecessary removal of sound concrete
• Micro fracturing of sound concrete due to vibration
• Unintentional damage to rebar.
• Uncertainty as to complete removal of deteriorated
concrete and corrosive chlorides
Our 10,000 - 40,000 psi waterjet systems provide a cost
effective and environmentally sound solution.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Video Inspection
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Hennigan Engineering's Tunnel Vision
Division provides comprehensive
infrastructure video investigation and
low pressure hydrojet cleaning services.
We are outfitted with every type of
camera required for video inspection of
pipes from 1 1/2-inch up to 120-inches
in diameter. In addition to this; we have
been call upon by our clients to design,
build and operate specialized, on-of-a-
kind pieces of video equipment to
inspect infrastructure situations that are
unusually complicated and require
custom equipment. Tunnel Vision has
service capabilities that include waterjet
cleaning up to 4,200 psi and vacuum
truck / jet rodder services.
A DIVISION OF HENNIGAN ENGINEERING.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

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Engineering Co., Inc. employs trained ,
licensed, professionals who have experience
in mitigating the effects of problematic water
intrusion conditions. A proven track record
with NRC program oversight further
strengthens our leadership position with these
technologies. Specialized hardware, sealing
materials and chemicals are used to diagnose
and design system to prevent and / or arrest
active water in-leakage. We can instruct/train
client employees or provide water intrusion
specialty teams to accomplish the optimum
sealing solution for the customers application.
For nuclear facilities, we use our experienced
materiel condition specialist to work with site
personnel to maintain the "best of best"
standard during our work evolution. We are
familiar with procedure creation and
adherence criteria. Hennigan Engineering is
competent eliminate the worst intrusion water
problems.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Hydrostatic Testing
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"Hydrostatic testing" is a diagnostic technique to check pressure
vessels, pipes, and boilers for leaks or defects. The devise to be
tested is filled with an incompressible liquid, usually water or
oil. With the assistance of a positive displacement pump
incorporating appropriate safety relief's and controls, the
pressure of the test component is slowly increased to a
predetermined set point and held for a predetermined time.
Visual inspection is subsequently performed to determine if any
leakage exists and if the pressure set point reduces.
Hennigan Engineering deploys the appropriate Electric, Air or
Diesel driven positive displacement pump system as well as
experienced personnel to perform our testing. Normal testing
utilizes a low volume, medium-pressure (20 psi to 2,000
psi), hydrostatic test pump designed to testing small water line
or pressure systems. Larger capacity diesel driven pumps are
also available to test large systems or vessels to pressures up to
60,000 psi. The test pump assemblies are complete with a an
unloader valve or pressure regulator to regulate pressure, a high-
pressure discharge valve to isolate the device being tested and a
pressure gauge that is traceable to the National Bureau of
Standards for certification of the test.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Tube Plugging
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Our sister company HEPCO, Heat Exchanger Products Corporation, manufactures high
quality specialty tools and high quality, long lasting, silicone tube plugs in Brass, 316
Stainless Steel, Titanium and Ultem. The sizes range to fit 5/8", 3/4", 7/8",1", 1 1/8", 1
1/4" O.D. tubes. Custom sized plugs are also available upon request.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

Consulting & ReportingBack to Home
Hennigan Engineering is a unique resource for our clients in that we are often consulted to
design and implement solutions to problems that are particularly unique, challenging and
complex. It is this ability that defines the value of our services to our clients. In many
cases, it is important to develop technical reports to document a particular project and / or
provide project implementation consult services acting as an agent for clients on projects
with special oversight and management needs. Hennigan Engineering provides project
oversight and can prepare / deliver project planning presentations, project reporting and
related services for all of our clients; regardless of industry type.
Boiler Cleaning
Hydrodemolition
Video Inspection
Hydrostatic Testing
Tube Plugging

TestimonialsBack to Home
Tim,
I want to express my appreciation for your timely response to Electric Boat's urgent need for your heat exchanger
cleaning service.
Your team of about a dozen personnel arrived on short notice and worked around the clock to complete the cleaning
operation to the highest standards within 5 days. This effort was critical to support the completion schedule for this
ship.
Many thanks for your excellent timely service.
Thanks,
F.J. Harris
Sr. Vice President, Programs
General Dynamics Electric Boat11
South Carolina Power
Calpine Tiverton Power
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Boston Ship Repair, Inc
Mirant Canal, LLC
Providence Water Board
General Dynamics

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Sole Source Justification - South Carolina Electric & Gas
ENGINEERS TECHNICAL WORK RECORD
Project Title Sole source justification for HX cleaning Page 1 of 1
Hennigan Engineering is recommended to be the sole source to high pressure water clean heat exchangers and
piping as specified in RF 9. It is justified to consider only Hennigan to perform this work for the following reasons:
1. Hennigan has performed this type of work for the previous three outages. Each of the previous jobs were put out
for bid and Hennigan was awarded the job each time based on the industry wide well known quality of their work.
At VC Summer, the results of Hennigan’s work has been excellent.
2. The decision to high pressure water clean a number of the components scheduled for RF 9 was based on recent
performance. Because the time to the outage is short, Hennigan is the best choice to perform this work based on
their familiarity with the requirements at VC Summer.

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Dear Tim,
Calpine Tiverton Power is a 265 megawatt combined cycle generating station located in Tiverton, Rhode Island.
During our recent scheduled maintenance outage, we discovered that the coating in our steam turbine lube oil tank
has failed to the point that corrective action was necessary before the plant could return to service. The Hennigan
Engineering Company, Inc. was selected through our maintenance contractor, General Electric, to prepare and
recoat the tank. As the plant was scheduled for imminent restart, rapid turn around of the tank surface cleaning,
preparation, metal profiling, and coating application were critical. You included forced curing of the selected
coatings product in order to avoid an additional eight days of ambient temperature cure. Calpine Tiverton Power
was included in the project planning and implementation. Your safety awareness on this fast track repair was
impressive and complied with Calpine's outside contractor standards.
Thank you for your quick response and sensitivity to providing a solution to our tank coating failure, safely and
within the limited time available.
Please feel free to use this correspondence as a recommendation to any potential clients.
Wishing you, your family and employees the best for the holiday season.
Robert C. O'Brien
Plant Manager

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
ALABAMA POWER
A SOUTHERN COMPANY
To Whom It May Concern:
Subject: Hennigan Engineering
Plant Gorgas Unit 9 began experiencing a Manganese scale buildup on our recently installed 304 Stainless Steel
condenser tubes. This buildup was having a detrimental effect on our condenser cleanliness factor, therefore driving
our unit heat rate up. We unsuccessfully tried several processes, including various mechanical scraper designs, to
remove the Manganese buildup.
Hennigan Engineering was brought in to demonstrate their "Hydrolasing" technique in January 1998. Their
process worked better than we expected and cleaned the condenser tubes to an almost new semblance. They worked
well with our personnel, and cleaned our condenser with the unit still on line so we did not have to suffer a full
derating.
We were well pleased with the results of their work as well as the professionalism of their crew. We have used
Hennigan Engineering again during our fall 1998 outage on Unit 9 and have been just as pleased with the results.
Until we find a more cost acceptable means of controlling our Manganese problem, we will continue to utilize
Hennigan Engineering’s expertise in this area.
Team Leader - Operations
Alabama Power Company Plant Gorgas

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Beloit/PEOC
85 Princeton Road
Fitchburg, MA 01420
Dear Mr. Hennigan:
I contracted your company to perform a particularly difficult Air PreHeater hydrolase cleaning.
The majority of the 2"O.D. tubes in the lower tube bundle of the Air PreHeater were plugged with a coal ash material that
had formed during several previous fire hose washdowns in the air heater. This material had solidified into a very hard
concrete-like substance that plugged the full length of many of the tubes. The situation resulted in unit inefficiencies,
increased fuel consumption, and lack of O2 to the boiler which limited our power output.
In the past we have had competitors of yours come in to hydroblast and mechanically clean the Air PreHeater tubes. With no
significant success. Our last option (excluding tube replacement) was to hire Hennigan Engineering. Had you not been able
to get through we were prepared to cut out the airheater tubes and replace them.
I am writing to acknowledge the success of your personnel and equipment. The specialized hydrolase equipment your people
designed for this job unplugged 100% of the Air PreHeater tubes. The boiler is now running at 105%. Thank you.
Sincerely,
Chief Engineer

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
PSNH
Public Service Of New Hampshire
Hennigan Engineering
55 Industrial Park Road
Hingham, MA 02043
Attention: Mr. Hennigan
Dear Mr. Hennigan,
I am writing to compliment you on a job well done. After the main condenser sleeving project and
having followed that up with a tube sheet and tube insert epoxy coating system, I was understandably
apprehensive about future hydroblast tube cleaning operations. Your crew was perhaps one of the
most motivated and well informed contractors of which it has been my pleasure to work with. Each
member of your crew was genuinely concerned about each and every tube. They understood the scope
of the cleaning, the importance of following the cleaning plan and did it with a degree of
professionalism that was truly refreshing. Please pass along my comments to your employees and I
look forward to working with you again in the future.
Sincerely,
Chemical Supervisor

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
HEC Hydrolase vs. Mechanical - Wolf Creek Nuclear
(INPO COMMUNIQUE)
WOLF CREEK NUCLEAR (WCN)
Subject: This is a response to message # 16053
Re: Condenser Tube Fouling/Cleaning
Wolf Creek Nuclear Operating Corporation provides the following response:
1) During May we performed hydrolase cleaning with the plant on-line, the circ water passes we were able to
enter (4 out of 6 for which isolation valves held), the hydrolase process produced excellent results. We used 20,000
psi water pressure. This has allowed us to utilize our new on-line ball cleaning system installed in March since the
tubes must be initially clean before starting up the ball cleaning system. Plant performance data shows the ball
cleaning system to be effective at maintaining tube cleanliness. Over the past two summers we have used Sidtec
cleaning rockets with some success, but this method does not have nearly as much operational flexibility as the
ball cleaning system.
2) We attempted on-line chemical cleaning March '95 using Betz 860. The process was terminated after cleaning
one pass due to development of tube leak and the deleterious effects on secondary chemistry.
3) We have tried several methods of cleaning off-line during refuel outages. We have tried nylon brushes
(once), Conco scrappers (twice), chemical cleaning (three times). Based on our recent experiences with Hennigan
Eng. hydrolase cleaning, this method is the most effective and will be used as the manual cleaning process of
choice during future outages.

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
HEC Vendor Comparison - Entergy
M E M O R A N D U M
Subject: Heat Exchanger Tube Hydrolasing
Design Engineering (George Hughes) and yourself completed a field trip to the Halliburton Industrial. Services. Inc.
to demonstrate their hydrolasing equipment.
The demonstration was conducted as follows:
Two split sections of 3/4" Cu/Ni tubing approximately 16" long from the ICCS-E1A heat exchanger were used.
Halliburton using a pipe vise to hold the tubing applied 10,000 psi to their hydrolasing tip and passed the lance
through the first tube 4 times (2 Forward and 2 reverse). The process was repeated on the second tube but only 2
times through the second tube (I forward and 1 reverse). The results when compared with a tube cleaned from the
same heat exchanger, but cleaned by Hennigan Eng., showed a reduction in the cleanliness from 90% to
approximately 70% clean. With a lot of streaking left behind. It should be noted that any streaking inside the tube
sets up & galvanic cell. and heavy corrosion at that location will result. In conclusion, it is Design Engineering's
recommendation to use Hennigan Engineering to clean any of the-RBS heat exchangers during RF-3 that need
cleaning. Hennigan's past performance plus their patented hydrolasing tip make them the logical choice to use here at
RBS.
If you have any questions, please call.
Supervisor - BOP Design
Riverbend Nuclear Group

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Attaboy Recognition - Maine Yankee Nuclear Plant
Maine Yankee
Attaboy/Attagirl Recognition Letter
To: Tim Hennigan, Hennigan
From: Engineering
Subj: Exceptional Performance
During today's Morning Management Meeting you were commended by CED for your participation in the successful
steam generator bowl water decontamination effort. The tools and process were specifically developed for use at
Maine Yankee in preparation for a long sleeving campaign. The bowl decon achieved dose rate reduction levels of
two to seven times pre-decon dose rates and is viewed as a great success for Maine Yankee as the anticipated dose to
complete sleeving is expected to be significantly less than if the decon was not successful. CED and Plant
Management congratulate and thank those that made this effort a great success. Excellent work!
Attached is your attaboy sticker.
We want to say thank for your fine efforts and a job well done. It's people like you who make Maine Yankee what it
is today.
Thanks,
Manager, CED
Acting Plant Manager

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Metallurgical Analysis - Duke Power: Metallurgical Analysis Report
Requestor/Dept.: CNS Component Eng.
Equipment Description: Admiralty brass KR heat exchanger tube, hydrolased for demonstration purposes.
Background Information:
Hydrolasing was performed by a vendor on various areas of the 5/8" diameter tube to demonstrate the cleaning
process. Pressures of 10, 15, and 20 ksi were used at a traverse rata of 1 foot per second. Portions of the tube were left
uncleaned for comparison. These tubes are typically cleaned using plastic scrapers.
General corrosion has commonly been a problem; pitting corrosion has also been experienced. The cleaning cycle for
KR heat exchangers was recently changed from 18 months to 9 months.
Metallography:
The 10 ksi cleaning left much of the interior oxide intact, nearly as much as was present in an uncleaned section
(figures 4 and 5). The 20 ksi cleaning removed nearly all of the oxide and much of the surface roughness as well
(Figure 6).
Conclusions:
No wall loss due to hydrolaser cleaning was seen in the brass tubes. The interior surface texture was not greatly
altered by the 10 ksi cleaning; the rough surface of the violent oxide resulted from the texture left by the general
corrosion. Only at 20 ksi were some of the protruding surface features removed, leaving an overall smoother surface
without reducing the minimum wall thickness. Corrosion prevention is the main reason for cleaning the heat
exchanger. The root cause of the widespread general corrosion is unclear; it is probably due to a combination of
factors, including oxygen concentration, underdeposit corrosion, and mild galvanic effects of iron in the deposits. The
violet oxide layer beneath the deposits serves to protect the base metal and there is no benefit in removing it. The
thickness of the oxide layer was virtually unchanged by the 10 ksi hydrolasing, indicating that cleaning at 10 ksi
effectively removed the silt and slime.
If the Metallurgy Lab can be of further assistance, please call.

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
HEC Hydrolase Erosion Analysis - ComEd
To: MEO CTEAM
Subject: Summary of Hennigan Engineering Company Hydrolasing Demonstration
A hydrolasing demonstration was performed by the Hennigan Engineering Company at Braidwood Station on April 4,
1997. The testing was performed on an 8 foot long section of 1" OD x 0.028 " thick Type 304 stainless steel tubing
supplied by SMAD, which had originally been installed in the Zion Unit 2 condenser. Using a dremmel tool
circumferential defects measuring 60%, 70%, 80%, 90% and 100% through wall were machined on the OD surface of
the tube. In addition, several pit-like indications were machined using a drill. The initial hydrolasing was performed
using the following parameters:
The hydrolasing was witnessed by the SMAD-NDE Group. None of the Partially through wad defects deformed or
leaked during the fisted exposures. None of the through wall defects grew in size.
After the initial testing results were acceptable, the nozzle was pressurized to 20,000 psi and allowed to sit at a mid-
span (defect free) location for approximately 1 minute. Diameter measurements revealed no swelling and the exposed
area was cross-sectioned and metallographically examined by the SMAD-Metallurgy Group. No thinning was
detected. An unsupported free end of the tube was also exposed to a stationary 20,000 psi test. The free end vibrated
violently and after approximately 20 seconds, the tube split axially for approximately 1". Metallographic examination
revealed deformation along the fracture edge, indicative of an overloading failure. It should be noted that the
stationary, free end test is not representative of the loading encountered during heat exchanger tube hydrolasing.
Braidwood performed 20,000 psi cleaning of the tubes in 1 waterbox during AIR06. Subsequent eddy current
examinations suggested the hydrolasing did not damage the tubes.
SMAD-metallurgy

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Hydrolasing -USNS Gordon -Boston Ship Repair, Inc.
I would like to take this time to express the quality of work that Hennigan Engineering performed during the repair of the
USNS Gordon for Boston Ship Repair, Inc. Hennigan Engineering showed professionalism in all aspects of the work that was
performed in the shipyard. Work was done in a timely and efficient manner. We look forward to working with Hennigan
Engineering in the future.
Sincerely,
Edward Snyder, President

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Heat Exchanger Tube Cleaning & Hydrolasing -Mirant Canal, LLC
Dear Tim:
Looking over a long history of Hennigan's service to Canal Electric Company, I wanted to take the opportunity to commend
you for many jobs well done! In an era of uncertainty, it is reassuring to have the certainty of reliability, professionalism, and
the commitment of excellence in service.From a technical viewpoint, it has been our experience that Hennigan's promise to
restore and maintain maximum operating efficiency for every condenser and heat exchanger without harm to the tube
materials, while inhibiting corrosion and extending tube life, has proven to be more than cost effective for Canal Electric.
Your hydrolasing techniques have satisfied and exceeded all our project requirements. We look forward to a continuing,
mutually-rewarding relationship with Hennigan Engineering.
Thank you, Tim!
Sincerely,
Michael Murphy; Planning Department

General Dynamics
PS of New Hampshire
Beloit / PEOC
Alabama Power
Wolf Creek Nuclear
Entergy
Yankee Nuclear
Duke Nuclear
ComED
Mirant Canal, LLC
Rehabilitation of 48-Inch Riveted Steel Line
In June 2001, Hennigan Engineering was selected to rehabilitate approximately 380-feet of 48-inch riveted steel pipe
(washwater main) at our purification plant. The washwater main and thirty-six associated lateral lines were exhibiting
severe corrosion and pitting due to coating failure. Used primarily for back washing of filters, this pipe is of critical
importance to our treatment process and could not be removed from service during the work. The rehabilitation
project, located in a very damp environment with difficult space constraints and high risk issues, consisted of removal
and disposal of the existing lead based coating system, dehumidification of the space, filling of the pits, application of a
new two coat urethane paint system, air quality monitoring, safety controls and complex coordination with other
contractors while maintaining daily access to the space for our personnel. Even though many unforeseen obstacles and
conditions were encountered throughout the project, Hennigan Engineering completed the work professionally and
diligently on time and within budget. The quality of the finished work is very high as evidenced by the very minute
amount of touchup work required at the just completed one-year anniversary inspection. Given that this project could
only have been completed in this quality manner by a very well organized, dependable and energized group, we were
very impressed with Hennigan's personnel from top to bottom. Hennigan proved to be highly skilled in all phases of
the work described above. Based upon Hennigan Engineering's work on this project, we have no hesitation in
recommending them for any lead paint removal or steel structure corrosion protection projects.
Respectfully,
Jason D. Herrick, P.E.
Principle Engineer; Providence Water Supply Board

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