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What are the residual risks when working with X-ray systems?

This article explains the residual risks that may remain when working with industrial X-ray systems such as the RAYEX® S, even when all safety measures are correctly applied.

What are residual risks?

Residual risks are risks that cannot be completely eliminated by design or protective measures, but are reduced to an acceptable level through safety systems, procedures, and correct use.

Although the RAYEX® S is designed in accordance with applicable safety standards, certain risks remain inherent to the use of X-ray radiation and high-voltage equipment.

Residual radiation risk

The RAYEX® S generates X-rays during operation. When used correctly, radiation levels remain within legal limits.

However, a residual risk exists in the following situations:

  • Damage to the housing or protective tubes

  • Missing or improperly installed protective covers

  • Incorrect installation or modification of the system

  • Failure of safety circuits

If stray or scattered radiation exceeds permitted limits, the system must be taken out of service immediately.

Electrical shock risk (high voltage)

During operation, the RAYEX® S contains dangerous high voltages inside the housing.

Residual electrical risks exist if:

  • The housing is opened while the unit is powered

  • Safety instructions are ignored during maintenance

  • Electrical work is performed by unqualified personnel

Even with built-in safety measures, improper access to internal components can lead to severe electric shock.

Risk during maintenance and service

Residual risks increase during maintenance, inspection, or service work.

Potential risks include:

  • Exposure to hazardous voltage if the system is not disconnected from mains power

  • Damage to sensitive components due to improper handling

  • Incorrect reassembly leading to unsafe operation

For this reason, maintenance and repairs are restricted to trained and authorized personnel only.

Risk due to incorrect operation or misuse

The RAYEX® S must only be used for its intended purpose.

Residual risks may arise from:

  • Using the system outside specified operating conditions

  • Bypassing safety devices or emergency shut-off circuits

  • Operating the system with damaged components

  • Using the system in environments not suited for X-ray equipment

Such misuse can result in inaccurate measurements and increased safety risks.

Transport and handling risks

Residual risks exist during:

  • Transport and lifting

  • Installation or relocation

  • Inadequate securing of the unit

Improper handling during transport can lead to physical injury or equipment damage.

How residual risks are controlled

Residual risks are mitigated by:

  • Built-in safety circuits and interlocks

  • Protective housings and tubes

  • Mandatory safety checks and inspections

  • Strict access control to authorized personnel only

  • Clear operating and maintenance procedures

Even with these measures, awareness and compliance remain essential.