Radiography Hazards and Safety Measures in the workplace
Industrial radiography uses X-rays or gama rays to test metal parts and welds for hidden flaws. Core safety measures relay on time, distance, shielding and personal monitoring devices managed by certified operators.
Ganpat Shinde
8/5/20264 min read
Introduction
Industrial radiography is a vital non-destructive testing (NDT) technique used to inspect welds, pipelines, pressure vessels, structural components, and other critical equipment without causing damage. It uses X-rays or Gamma rays to detect internal defects that are not visible to the naked eye.
While radiography plays a crucial role in ensuring industrial safety and product quality, it also involves exposure to ionizing radiation, which can pose serious health risks if not properly controlled. Strict safety procedures, trained personnel, and regulatory compliance are essential to protect workers and the public.
What is Industrial Radiography?
Industrial radiography is a method of examining the internal structure of materials using ionizing radiation. The radiation passes through the object and creates an image on a film or digital detector, revealing cracks, voids, corrosion, or weld defects.
Common Radiation Sources
X-ray Machines
Gamma-ray Sources
o Iridium-192 (Ir-192)
o Cobalt-60 (Co-60)
o Selenium-75 (Se-75)
Hazards of Industrial Radiography
1. Radiation Exposure
The greatest hazard is exposure to ionizing radiation, which can damage body tissues and DNA.
Possible Effects
Skin burns
Radiation sickness
Cataracts
Reduced fertility
Increased risk of cancer
Genetic mutations (with high exposure)
2. Accidental Exposure
Workers or nearby personnel may receive unintended radiation exposure due to:
Poor barricading
Entering restricted areas
Equipment malfunction
Human error
Source failing to retract into the exposure device
3. Lost or Stuck Radioactive Source
A gamma source may become stuck outside its shield due to equipment failure, creating a severe radiation hazard.
4. Improper Handling of Equipment
Improper storage, transportation, or maintenance of radioactive sources can result in:
Radiation leaks
Equipment damage
Unauthorized access
5. Confined Space Radiography
Performing radiography inside tanks, vessels, or pipelines increases risks because workers may unknowingly enter radiation areas.
6. Working at Height or Remote Locations
Radiography often takes place:
On scaffolds
Offshore platforms
Construction sites
Pipelines
This introduces additional hazards such as falls, slips, and adverse weather.
7. Electrical Hazards
Portable X-ray machines operate at high voltage, creating electrical shock hazards if equipment is damaged or improperly used.
Health Effects of Radiation
Acute (Short-Term) Effects
Nausea
Vomiting
Fatigue
Skin redness
Hair loss (high doses)
Radiation burns
Chronic (Long-Term) Effects
Cancer
Cataracts
Infertility
Bone marrow damage
Genetic effects
Safety Measures for Industrial Radiography
1. Apply the ALARA Principle
Radiation exposure should always be kept As Low As Reasonably Achievable (ALARA) by controlling:
Time – Minimize time spent near the radiation source.
Distance – Stay as far away as practical; radiation intensity decreases rapidly with distance.
Shielding – Use lead, concrete, steel, or other approved shielding materials.
2. Restrict Access
Establish controlled areas.
Barricade the work zone.
Display radiation warning signs.
Prevent unauthorized entry.
Assign a radiation safety watch when necessary.
3. Use Radiation Monitoring Devices
Every radiography worker should wear:
Personal dosimeter (TLD/OSL badge)
Electronic Personal Dosimeter (EPD), where required
Use calibrated survey meters to confirm radiation levels before allowing access to the area.
4. Inspect Equipment Before Use
Check:
Exposure device
Source guide tube
Remote control cable
Locking mechanism
Survey meter calibration
Warning lights and alarms
Do not use damaged equipment.
5. Proper Training
Only trained and authorized personnel should perform radiography.
Training should include:
Radiation hazards
Safe operating procedures
Emergency response
Source recovery techniques
Regulatory requirements
6. Follow Standard Operating Procedures (SOPs)
Always:
Obtain the required work permit.
Verify the radiation source is fully retracted after exposure.
Survey the area before removing barricades.
Maintain constant communication with the radiography team.
7. Emergency Preparedness
Prepare procedures for:
Source stuck outside the shield
Lost radioactive source
Radiation overexposure
Equipment failure
Medical emergencies
Only qualified personnel should attempt source recovery.
8. Safe Storage and Transportation
Store radioactive sources in approved shielded containers.
Keep storage areas locked and access controlled.
Transport sources according to applicable regulations.
Maintain inventory and movement records.
9. Personal Protective Equipment (PPE)
While PPE does not stop gamma or X-rays, workers should use:
Safety helmet
Safety shoes
Gloves
High-visibility vest
Eye protection (as required)
Fall protection when working at height
Radiation protection relies primarily on time, distance, and shielding, not conventional PPE.
10. Regular Health Surveillance
Employers should ensure:
Periodic medical examinations
Review of radiation dose records
Health monitoring as required by regulations
Investigation of abnormal dose readings
Do's and Don'ts
Do's
Follow the ALARA (As Low As Reasonably Achievable) principle.
Wear your personal dosimeter.
Use calibrated survey meters.
Verify the source has returned to its shielded position.
Keep unauthorized persons away.
Report abnormal conditions immediately.
Don'ts
Never enter a barricaded radiation area without authorization.
Never bypass safety interlocks.
Never handle a radioactive source directly.
Never ignore survey meter readings.
Never perform radiography without proper training and authorization.
Emergency Response
If a radiation incident occurs:
Stop work immediately.
Evacuate all unnecessary personnel.
Secure the area.
Notify the Radiation Safety Officer (RSO) immediately.
Measure radiation levels using a survey meter.
Do not attempt source recovery unless trained and authorized.
Record and report the incident according to regulatory requirements.
Key Safety Tips
Plan every radiography job before starting.
Keep exposure time to a minimum.
Maximize distance from the source.
Use appropriate shielding.
Wear a dosimeter at all times.
Never remove barriers until radiation levels are confirmed safe.
Only competent and authorized personnel should perform radiography.
Conclusion
Industrial radiography is an indispensable inspection method that helps ensure the integrity and safety of critical equipment. However, the ionizing radiation used in radiography presents significant health hazards if not managed correctly. By adhering to the ALARA (As Low As Reasonably Achievable) principle, using proper shielding, restricting access, monitoring radiation levels, maintaining equipment, and ensuring comprehensive training, organizations can minimize radiation exposure and create a safe working environment. A strong radiation safety culture protects not only radiography personnel but also coworkers, contractors, and the public.