Company lists · Data refreshed November 2026

Top 25 Nuclear containment system testing companies based in the United States

RevenueBase identified 65 company matches for nuclear containment system testing companies associated with the United States as of November 2026 and tracks 1,629 professional contacts across them, including 476 with verified work emails. Spartanburg is the largest hub.

This list covers company matches for nuclear containment system testing companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
65Companies
1,629Contacts tracked
476Verified emails
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The 25 largest nuclear containment system testing companies based in the United States

Ranked by team size
Top 25 of 65 company matches for nuclear containment system testing companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFort Worth, TX, United StatesHQ recorded Nov 6, 2026201-500252 contacts →

Exact match

“Paragon tackles the most difficult challenges of the nuclear industry-those faced by the current operating fleet as well as the next generation of advanced reactors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchCharlotte, TN, United StatesHQ recorded Nov 6, 202651-200120 contacts →

Exact match

“At Atkins Nuclear Solutions US, we offer client solutions crafted by the best engineers and specialists in the industry, served with truly exceptional customer service.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchGolden, NM, United StatesHQ recorded Nov 6, 202651-20078 contacts →

Exact match

“NFT, founded in 1984 and headquartered in Golden Colorado along with EPD located in Carlsbad New Mexico, is an industry leader dedicated to the manufacturing of highly engineered…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBurr Ridge, IL, United StatesHQ recorded Nov 6, 202651-20062 contacts →

Exact match

“Fauske & Associates (FAI) is a world leader in nuclear, industrial and chemical process safety.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchNorcross, GA, United StatesHQ recorded Nov 6, 202651-20058 contacts →

Exact match

“United Controls International was established as a division of Reliance Electric in 1971 and was later spun off as an independent company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchWestminster, CO, United StatesHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“Advanced Technology Group (ATG) is a trusted partner in the design, engineering, and manufacturing of advanced containment systems for demanding industrial and energy applications.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchStreator, IL, United StatesHQ recorded Nov 6, 202611-5053 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLatrobe, PA, United StatesHQ recorded Nov 6, 2026201-50050 contacts →

Exact match

“Established in 1987, Master-Lee Energy Services was founded to provide the commercial Nuclear Power Industry with engineering, reactor services, decontamination, Reactor Coolant…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchKnoxville, TN, United StatesHQ recorded Nov 6, 202651-20046 contacts →

Exact match

“Analysis and Measurement Services Corporation (AMS) is a nuclear engineering consulting firm and recognized market leader in providing the worldwide nuclear power industry with…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchOak Ridge, TN, United StatesHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“At Paschal Solutions, we are more than engineers-we are problem solvers, innovators, and trusted partners in providing nuclear safety and specialized nuclear engineering technical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchRed Wing, MN, United StatesHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“Central Research Laboratories (CRL) is a global leader in the remote handling industry, leveraging decades of innovative industry experience to design and manufacture…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchWashington, PA, United StatesHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“NDE Technology is a full service Non-Destructive Testing Company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchFramingham, MA, United StatesHQ recorded Nov 6, 202651-20015 contacts →

Exact match

“EPM is a multi-discipline engineering company that provides cost-effective solutions for safe and reliable operation of nuclear power plants.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchPittsburgh, PA, United StatesHQ recorded Nov 6, 20261-1014 contacts →

Exact match

“FPoliSolutions specializes in the execution of complex analytical projects for industry segments that demands absolute reliability and safety.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBirmingham, AL, United StatesHQ recorded Nov 6, 202651-20012 contacts →

Exact match

“Our Company TriVis Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAlexandria, VA, United StatesHQ recorded Nov 6, 202611-509 contacts →

Exact match

“At NuSource, our primary focus is to provide cutting-edge integrated engineering and manufacturing solutions for commercial nuclear components and equipment.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSycamore, IL, United StatesHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Whether your goal is to maintain an existing reactor, decommission an old reactor, or design a new one, TransWare Enterprises Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchGroton, CT, United StatesHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Radiation Protection Systems (an Alpha Safety company is a design-build engineering company focused on engineering controls to minimize worker exposure and contamination spread.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchRockdale, IL, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Radiological Solutions (RSI) is a nuclear engineering and consulting firm specializing in water chemistry optimization, radiological dose management, gamma scanning, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchTucson, AZ, United StatesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“World Wide Containment Testing Company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchRoanoke, VA, United StatesHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Robatel Technologies was established in 2009 as the US subsidiary of Robatel SA.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLynchburg, VA, United StatesHQ recorded Nov 6, 20261-105 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGroton, CT, United StatesHQ recorded Nov 6, 202611-505 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchDowners Grove, United StatesHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Inservice Engineering is celebrating its 20th year of providing quality engineering services to the nuclear industry!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchSpartanburg, SC, United StatesHQ recorded Nov 6, 202611-504 contacts →

Exact match

“Website: NWS Technologies is a privately owned Nuclear Valve Service Company in the business of off-site testing and repairing safety/relief valves for nuclear power plants.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 65 nuclear containment system testing companies based in the United States

See the full list, filter by size, metro and specialty, and access 476 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Nuclear containment system testing companies based in the United States at a glance

As of Nov 6, 2026
29.2%Verified-email coverage
25.1Average contacts per company
11-50Median size (employees)
4.6%Largest-city concentration · Spartanburg
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
22
51-200
15
201-500
3
1,001-5,000
1
5,001-10,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 65 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “nuclear containment system testing companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 476 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “nuclear containment system testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nuclear containment system testing companies are there based in the United States?

RevenueBase identified 65 company matches for nuclear containment system testing companies associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Paragon Energy Solutions tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most nuclear containment system testing companies?

Spartanburg leads with 3 company records, followed by Groton (2) and Oak Ridge (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 476 professional contacts with verified work emails tracked across these 65 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 65 nuclear containment system testing companies based in the United States. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.