Safety & Reliability

Nuclear safety

The basic approach in the use of nuclear energy is to make continuous improvements in processes, the organisation of activities, staff training and the implementation of necessary technical improvements.

Operational Events in the Company – INES 1 Evaluation
Nuclear power plant
Bohunice Nuclear Power Plant
Mochovce Nuclear Power Plant

The overall number of operational events subject to reporting duty to the Nuclear Regulatory Authority of the Slovak Republic shows a falling trend.

Average Number of Automatic Reactor Scrams (AO1) per Unit in Slovenské elektrárne

In 2014 there was no operational event connected with automatic reactor scram initiated by automatic protection 1.

Radiation protection

Slovenské elektrárne complies with requirements for the protection of people and the environment against radiation and its effects, including means for ensuring such protection.

The ALARA principle (As Low As Reasonably Achievable) is the basic principle for the management of the radiation exposure of staff and workers, the production of radioactive waste and the release of radioactive substances into the environment. Slovenské elektrárne continuously achieves an excellent record for radiation protection.

There was no radiation incident or accident. Gases and liquids discharged into the environment had low levels of radioactivity and were within permissible guide values. In terms of public protection,this means that the maximum values of calculated individual effective dose reach the order of a tenth of microSievert.

This is an insignificant fraction of the basic annual limit for personal exposure to radiation from the nuclear power plant operation, which the Public Health Authority of the Slovak Republic has determined to be 50 microsieverts. Read more

Radiation protection
Radiation protection
0,000001 μSv

The maximum values of calculated individual effective
dose reach the order of a tenth of microSievert.

Radiation protection
1,500 μSv

The average does of radiation from medical applications

10 μSv

A three-hour plane flight at a 10 km altitude

Emergency planning

Slovenské elektrárne meets the requirements for permanent preparedness to implement emergency plans for managing accidents or incidents with very low probability of occurrence. The company’s emergency preparedness system undergoes continuous maintenance, testing and improvement based on the Company’s own experience and the experience of other power plant operators around the world.

The main objective of emergency preparedness is to ensure that employees and external persons meet the technical, personnel and documentary requirements for the successful management of extraordinary events and the mitigation of their consequences. At the same time the Company places a strong emphasis on preventing the occurrence of incidents and accidents.

Safety Management System

Registered work-related accidents – development

* severe accidents according to Enel’s evaluation (over 30 days incapacity for work)

Calendar days of work lost due to work-related injuries of Slovenské elektrárne employees in 2014 were 70.3% lower than the level for 2010.

Recorded work-related accidents – development
Frequency Rate (FR) and Severity Index (SI)
Inspection activities
Safety technicans
Inspection of contractors
Number of inspections
Number of deficiencies

A total of 11 inspections were carried out in Slovenské elektrárne workplaces by state professional supervision, resulting in the detection of a total of 70 deficiencies.

Main Initiatives in the Areas of OH&S and Fire Protection
  • Training (defensive driving course for the drivers of service vehicles, inspection and acceptance of scaffolding, work constituting a fire hazard, confined spaces).

  • Expansion of the “One Safety” project (observation of risky behaviour) to cover staff areas.

  • Extension of the SAP OS&H module for use in Nuclear power plants.

  • Mapping and classification of asbestos in power plants

  • Mapping of uncertified tools (hand-made tools) use

  • Review, classification and processing of documentation for explosion danger zones.

Investment projects (capex)

In 2014 Slovenské elektrárne invested a total of 3,647,600 euro in safety measures

Fire protection

Slovenské elektrárne recorded one fire in 2014, in the external cable areas at the Bohunice Nuclear Power Plant plant. The probable cause was an overload current in a cable with a 220V DC voltage. Thanks to an anti-fire spray on the cables, the fire did not spread along the cables but extinguished itself. The fire did not cause damage to Slovenské elektrárne assets.

Number of fires

Fire protection technicians carried out 912 preventive fire protection inspections in 2014 during which 601 shortcomings were detected.

During 2014 the state fire inspection carried out three complete fire protection inspections. These identified 18 shortcomings, which were corrected within defined deadlines. Additional inspections carried out in Slovenské elektrárne plants included three specific fire protection inspections and five fire protection inspections related to the correction of shortcomings identified by previous fire protection inspections.


Slovenské elektrárne pays close attention to the issue of security, which can be divided into the areas of information security, physical protection of assets, crisis management and operational continuity management. Top management is supported in these areas by the Company Security Committee and the Crisis Management Team.

All activities are carried out in a manner that ensures an adequate level of protection for the Company’s protected assets against identified security risks and the conformity of operations with the security interests and objectives of the Slovak Republic (SR).

Security management
Internal Control System

“The Internal Audit is an independent, objective, assurance and consulting activity designed to add value and improving processes within the organisation. The Internal Audit helps the organisation to accomplish its objectives by bringing a systematic, disciplined approach to evaluate and improve the effectiveness of risk management, control, and governance processes.”

During 2014 the Internal Audit department carried out nine planned internal audits.

Slovenské elektrárne has undertaken to abide by its own Code of Ethics, which defines the principles of responsible business conduct to which the company is committed. In order to increase the ethical awareness of its employees, the company organised various types of training events throughout the year, the content of which was determined by the functions and responsibilities of event participants. E-learning training continued to be provided for all employees of the Company in cooperation with the Human Resources department.

Slovenské elektrárne operates an Ethics Hotline, which was used to submit to the Internal Audit department nine suggestions and complaints concerning breaches of ethical principles.

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