Why Rapid Personnel Screening Matters in Nuclear and Radiological Security
In many environments involving nuclear materials, the first question is not always whether an object is contaminated. Sometimes the more urgent question is whether a person is contaminated.
It is not always something people consider.
People move. People touch things. They pass through controlled zones, vehicles, checkpoints, incident scenes, laboratories, treatment areas, holding areas, decontamination corridors, changing rooms, command posts, storage spaces, and thousands of other possibilities. If nuclear material is present, personnel movement can become one of the fastest ways for contamination to migrate beyond the original point of concern.
This is why rapid personnel screening is such an important operational capability.
It is not simply about worker safety. It is about operational control and situational awareness.
If a person has potentially come into contact with uranium or plutonium, organisations need to understand that quickly enough to make decisions. Who needs to be isolated? Can be cleared? Who needs further assessment? Where should we be checking next?
Laboratory analysis remains important (it’s the backbone of the system). Specialist radiological monitoring remains important. Formal procedures remain important.
But complex operations cannot always wait for the laboratory before decisions begin.
Personnel Screening Is About Contamination Pathways
Personnel screening is often misunderstood as a purely medical or occupational health activity.
Its far broader than that.
In practical terms, personnel screening helps determine whether a person has become part of a contamination pathway. That may involve their hands, gloves, clothing, boots, exposed skin, PPE, tools, personal items, equipment, or the surfaces they have touched.
In a military environment, this could involve soldiers handling suspect material, vehicles, weapons, cargo, or debris. In a policing environment, it could involve officers securing a scene, searching a vehicle, examining suspicious material, or handling evidence. Mapping the incident boundary. In a healthcare environment, it could involve staff receiving or assessing individuals who may have been involved in a radiological incident. In a mining environment, it could involve workers leaving operational areas where uranium bearing material is present (is it in the break room? Are your engineering controls actually working?) You can test all of this by testing the people.
The operational question is simple.
Has this person, or something on this person, come into contact with nuclear material?
If the answer is potentially yes, the next decisions become more focused. If the answer appears to be no, resources can often be directed elsewhere.
That is the value of rapid screening.
The Need To Be Chemically Clean
In nuclear and radiological security, being “clean” cannot only mean visibly clean.
A person can look clean while still carrying contamination on hands, gloves, clothing, boots, equipment, tools, or skin. That matters because contamination does not remain politely where it first lands. It can move through ordinary human behaviour.
It could be contaminated glove can touch a vehicle door. Or a sleeve can touch a desk. Or boots that move material between zones. There are literally hundreds of ways nuclear contamination can migrate.
In many operational environments, that creates a practical need for chemical cleanliness as well as visual cleanliness. Personnel do not simply need to appear clean. They need to be screened in a way that helps determine whether the target contamination may still be present.
That is particularly important when the material of concern is uranium or plutonium. These are not ordinary contaminants. They sit at the intersection of nuclear security, radiological protection, safeguards, national security, environmental control, and public confidence.
The ability to rapidly screen people supports a more disciplined operational response.
Where Rapid Personnel Screening Matters
Personnel screening becomes especially valuable when people are moving through complex operational environments where uncertainty needs to be reduced quickly.
- Military teams handling suspect equipment, vehicles, weapons, containers, debris, or recovered material in the field.
- Police and security officers securing scenes where nuclear or radiological material may be present.
- Border and customs personnel examining cargo, vehicles, luggage, packages, or passengers following an alarm or intelligence alert.
- First responders operating at incident sites where people may have contacted contaminated surfaces, clothing, equipment, or debris.
- Healthcare and receiving facilities assessing whether incoming personnel, patients, clothing, or equipment may require contamination precautions.
- Uranium mining and processing operations checking personnel movement between operational areas, change rooms, workshops, vehicles, and support buildings. This is particularly important to test process controls. An often overlooked aspect by fiduciaries but not insurance companies.
- Nuclear security and safeguards teams determining whether contact with uranium or plutonium may have occurred during inspection, recovery, control, or investigation activities.
None of these examples require rapid screening to replace formal laboratory analysis. Instead the field screening supports it.
They show why earlier information matters.
Screening People Can Support the contamination tracing steps that follow
When contamination is detected on a person, the question rarely ends with that person. The next question is what did they touch? How did they come to be contaminated?
That is where rapid personnel screening can support contamination tracing activities.
This is not “contact tracing” in a medical sense. It is operational contamination tracing. If a person’s hands, gloves, clothing, or skin indicate possible contact with uranium or plutonium, teams can begin asking a more useful set of questions.
That can make the difference between broad uncertainty and focused response.
Without rapid personnel screening, teams may be forced to treat a larger group, a wider area, or more equipment as suspect until delayed analysis provides clarity. With rapid screening, they can begin narrowing the field earlier.
That is not just a safety benefit. Its an operational control benefit.
Why Speed Matters
In this context, speed is often a sequencing problem.
The first few decisions shape everything that follows. If the wrong people are released, contamination may migrate. If the wrong area is cleared, responders may lose control of the scene. If every person is held unnecessarily, operations can become slow, expensive, crowded, and difficult to manage.
Rapid screening helps bring information closer to the point of decision.
It can support triage, escalation, decontamination, zone control, release decisions, equipment checks, and focused follow-up testing. It can also help protect specialist resources by directing them toward the people, places, and items most likely to matter.
That is especially important in high throughput environments. Military operations, border crossings, emergency scenes, mines, airports, customs facilities, and healthcare receiving points all depend on movement. They cannot treat every uncertainty as a full stop unless the situation genuinely requires it.
Screening does not eliminate judgement. It reduces uncertainty allowing for more focussed judgement.
What CodeNu Adds
#CodeNu was developed by Color Tech Holdings to provide rapid field screening capability for uranium and plutonium contamination.
The capability is deliberately simple. CodeNu wipes provide a visible colour change when brought into contact with uranium or plutonium contamination. That makes them suitable for use in environments where immediate information is valuable and where specialist laboratory workflows may not be available at the point of need.
For personnel screening, this matters because CodeNu can be used to help assess hands, clothing, equipment, tools, PPE, surfaces, and skin where contact with uranium or plutonium may have occurred.
CodeNu is not positioned as a medical device. It does not diagnose, treat, monitor, or prevent disease. Its purpose is contamination screening and operational decision support.
It can identify if a person has uranium or plutonium on them (skin), their clothing or equipment.
Personnel screening for nuclear contamination is not the same as medical assessment. A wipe that indicates possible uranium or plutonium contamination on skin is not making a medical diagnosis. It is providing operational information about whether target contamination may be present at a location where immediate decisions are required. For example, if CodeNu detects uranium or plutonium on your face, hands or clothes and you have been near an incident, it would be strongly advised to seek further testing.
CodeNu has been independently tested at a globally renowned institution for performance claims, with supporting reports available. Independent regulatory assessment is also available confirming that CodeNu is not classified as a medical product. The technology is also supported by independent assessment relating to safe use on skin.
Those points matter because serious customers need more than a product claim.
They need technical credibility, regulatory clarity, and confidence that the capability can sit inside real operational procedures.
What Personnel Screening Can Support
The strongest use of rapid personnel screening is not theatrical. It is practical. It helps organisations decide what to do next.
- Identifying whether hands, clothing, gloves, boots, equipment, or exposed skin may show evidence of uranium or plutonium contact.
- Supporting controlled release decisions after people leave a suspect area, vehicle, cargo zone, incident scene, mine area, laboratory, or operational boundary.
- Helping determine whether adjacent tracing is required across vehicles, tools, workstations, weapons, bags, PPE, surfaces, evidence items, or other people.
- Supporting decontamination workflows by helping personnel understand whether contamination may still be present after initial cleaning.
- Prioritising specialist radiological monitoring, laboratory confirmation, or escalation when rapid indication suggests further investigation is required.
- Helping maintain operational continuity by reducing unnecessary uncertainty where no indication is present.
- Providing an additional layer of field awareness for military, police, border, customs, mining, healthcare, emergency response, nuclear security, and safeguards environments.
The value is not that every decision becomes automatic.
The value is that decisions can be made with better information earlier in the workflow. Speed saves lives. Not just from treatment but from providing peace of mind to the walking well.
Personnel Screening Is a Capability Gap
Many organisations already have strong specialist capabilities. But those systems are not always available at the exact point where uncertainty first appears.
That is the gap.
A soldier, police officer, border agent, firefighter, mine worker, healthcare receiver, or security operator may be standing in front of a person, vehicle, package, tool, item of clothing, weapon, stretcher, door handle, or operational surface and need an immediate answer.
Not a final laboratory answer. An operational answer.
Is there an indication of uranium or plutonium contamination here?
It can determine who is held, who is cleared, what is isolated, what is checked next, and whether specialist resources need to be brought forward.
That is why rapid personnel screening should be viewed as a core support capability rather than a novelty.
Rapid screening is most useful when it is understood correctly. It is a practical layer of operational awareness. That layer can be especially valuable when contamination could be present on people or on items that people carry, use, touch, or move.
In many environments, the issue is not a lack of final testing capability. The issue is the delay between suspicion and certainty.
CodeNu helps shorten that gap.
Frequently Asked Questions
What is personnel screening?
Personnel screening is the process of assessing whether a person, or something on a person, may be carrying contamination. In the context of CodeNu, this can include hands, skin, gloves, clothing, PPE, tools, equipment, and other items associated with a person’s movement through an operational environment.
Why does personnel screening matter for uranium and plutonium?
Uranium and plutonium are strategically significant nuclear materials. If they are present on people, clothing, or equipment, organisations need to know quickly so they can control movement, reduce contamination spread, prioritise specialist assessment, and maintain operational discipline.
Does CodeNu replace radiation detectors?
No. CodeNu is a rapid field screening tool for uranium and plutonium contamination. Radiation detectors, specialist monitoring systems, laboratory analysis, and formal procedures remain essential in serious nuclear, radiological, emergency response, and safeguards environments.
Does CodeNu replace laboratory analysis?
No. Laboratory analysis remains important for formal confirmation, documentation, quantitative assessment, and regulatory defensibility. CodeNu provides rapid onsite indication to support earlier operational decisions.
Can CodeNu be used on skin?
Yes. CodeNu is supported by independent assessment relating to use on skin. That matters because personnel screening may involve hands or exposed skin where contact with uranium or plutonium contamination may have occurred.
Is CodeNu a medical device?
No. CodeNu is not classified as a medical product. It is a contamination screening technology. It does not diagnose, treat, monitor, or prevent disease. It provides operational information about whether uranium or plutonium contamination may be present.
Why does “not a medical device” matter?
It matters because personnel screening can be misunderstood. Screening skin for contamination is not the same as diagnosing a medical condition. CodeNu is designed to support contamination awareness and operational decision-making, not clinical assessment. The products interact with uranium or plutonium NOT the human body or any bodily fluids.
Can CodeNu help determine who has handled nuclear materials?
CodeNu can help indicate whether uranium or plutonium contamination may be present on hands, skin, clothing, PPE, equipment, or surfaces. That information can support investigations into potential contact pathways, but it should be used as part of a broader operational and evidentiary process.
What is contamination tracing?
Contamination tracing means checking the people, objects, surfaces, vehicles, tools, workstations, clothing, PPE, or equipment that may have been touched or used by someone who shows an indication of contamination. It helps teams understand how contamination may have moved.
Why is rapid screening useful if specialist teams are still required?
Because specialist resources are limited and operational decisions often begin before those resources arrive. Rapid screening can help identify where specialist teams should focus first and whether escalation is likely to be necessary.
Is this only relevant to nuclear facilities?
No. Personnel screening may be relevant to military operations, law enforcement, border security, customs, airports, emergency response, healthcare receiving environments, uranium mining, nuclear security, safeguards, and remediation activities.
Why is this relevant to mining?
Uranium mining and processing environments involve personnel movement between operational areas, support buildings, vehicles, workshops, change rooms, and equipment. Rapid screening can help identify contamination transfer and support operational awareness.
Why is this relevant to healthcare?
Healthcare environments may become relevant when people, clothing, equipment, or incoming casualties may have been involved in a radiological or nuclear contamination incident. CodeNu should be understood as a contamination screening tool, not a medical diagnostic product.
Why is this relevant to military and police users?
Military and police personnel may encounter suspect materials, contaminated vehicles, weapons, packages, clothing, surfaces, or people in environments where laboratory access is delayed. Rapid screening can help support immediate scene management and escalation decisions.
What does “chemically clean” mean in this context?
Chemically clean means that the target chemical contamination of concern is not indicated on the person, object, surface, or item being screened. A person can appear visibly clean while still carrying contamination on hands, clothing, gloves, boots, equipment, or skin.
What makes CodeNu useful in the field?
CodeNu is portable, simple to use, requires no power, provides visual indication, and can be deployed at the point where operational decisions are being made. That makes it suitable for environments where delay, uncertainty, and movement create operational risk.
Further Reading: External
- IAEA – Nuclear Security Detection Architecture
https://www.iaea.org/topics/nuclear-security-detection-architecture - IAEA – Workplace Monitoring for Radiation and Contamination
https://www.iaea.org/publications/6757/workplace-monitoring-for-radiation-and-contamination - IAEA – Generic Procedures for Monitoring in a Nuclear or Radiological Emergency
https://www-pub.iaea.org/MTCD/Publications/PDF/EPR-Contamination_web.pdf - IAEA – Nuclear Security Series
https://www.iaea.org/publications/search/topics/nuclear-security-series - CDC – Decontamination for Yourself and Others
https://www.cdc.gov/radiation-emergencies/infographic/decontamination.html - CDC – How to Self-Decontaminate After a Radiation Emergency
https://www.cdc.gov/radiation-emergencies/prevention/self-decontaminate.html - GOV.UK – How to Remove Radioactive Material from Your Skin and Clothes
https://www.gov.uk/government/publications/radiation-emergencies-information-for-the-public/how-to-remove-radioactive-material-from-your-skin-and-clothes-self-decontamination-guidance - REMM – Procedures for Radiation Decontamination
https://remm.hhs.gov/ext_contamination.htm - WHO – Radiation Emergency: Self-Decontamination
https://cdn.who.int/media/docs/default-source/radiation/2_decontamination_final.pdf - U.S. EPA – Radiological Emergency Response
https://www.epa.gov/radiation/radiological-emergency-response - World Customs Organization – Implementing Nuclear Security Detection Architecture at Borders
https://mag.wcoomd.org/magazine/wco-news-104-issue-2-2024/implementing-nuclear-security-detection-architecture-kisks-off-in-racviac/ - U.S. NRC – Personnel Survey and Decontamination Procedure
https://www.nrc.gov/docs/ML2210/ML22103A169.pdf
Further Reading: Internal
- CodeNu Technical Data
https://colortechholdings.com/pages/codenu-technical-data - CodeNu Product Information
https://colortechholdings.com/pages/codenu - CodeNu Dry Wipes
https://colortechholdings.com/products/codenu-dry-wipes-box-of-100 - CodeNu Wet Wipe
https://colortechholdings.com/products/codenu-wet-wipe - Now Every Soldier Can Detect Uranium or Plutonium in the Field
https://colortechholdings.com/blogs/blog/now-every-soldier-can-detect-uranium-or-plutonium-in-the-field - Practical and Affordable Nuclear Detection Tools for Police
https://colortechholdings.com/blogs/blog/practical-and-affordable-nuclear-detection-tools-for-police
