Major industrial accidents

General information on the manner of warning the public who may be affected by a major industrial accident and appropriate action by the public:

Pursuant to the risk assessment, the risk to the public for all Slovenské elektrárne, a.s. branches is determined as being at an acceptable level, meaning that the risks entailing from a possible major industrial accident do not stretch beyond the grounds of the plant to such a degree and do not pose such danger to residents of surrounding towns and villages as would necessitate a system of warning notification to the public pursuant to the Law on Major Industrial Accidents.

Name and address of business

SLOVENSKÉ ELEKTRÁRNE, a.s.
Bohunice nuclear power plant, branch
919 31 Jaslovské Bohunice


Operator’s business name and registered office

Slovenské elektrárne, a.s.
Mlynské nivy 47, 821 09 Bratislava 2


Information on compliance with requirements of § 5 (notification to the district office in the county seat)

Enterprise classified in category A. Notification on the enterprise’s classification was sent to the competent district office on 15.10.2015.


Information on the enterprise’s current activity

Bohunice nuclear power plant (EBO), branch is an organisational unit of the joint-stock company Slovenské elektrárne. The Bohunice nuclear power plant comprises the nuclear power plant V2.

The power plant consists of two VVER 440 improved type V 213 pressurized water reactors. The third unit was commissioned into continuous operation on 14 February 1985 and the fourth unit in 18 December 1985.

In addition to the production and supply of electricity, EBO supplies hot water for heating the towns Trnava, Hlohovec and Leopoldov, as well as for industrial and other organisations, and supplies steam for the supply of heat to surrounding industrial plants. The building of a centralised heat supply system meant that the V2 nuclear power plant began cogeneration of heat and power. This system includes a heat feeder to Trnava and Bohunice, put into operation in 1987. About 10 years later this was accompanied by a heat feeder to Leopoldov and Hlohovec.

The Bohunice nuclear power plant, with a capacity of 2 x 505 MW contributes approximately 36% to the total electricity production of Slovak power plants. They operate in baseload regime in the electricity grid and their average annual electricity production ranges around 7500 GWh.

The V2 nuclear power plant is one of a group of power plants with a pressurised water energy heterogeneous reactor in which the fission reaction takes place predominantly through the action of thermal neutrons. Slightly enriched uranium dioxide is used as the fuel. The moderator and concurrently also the coolant is demineralised water containing boric acid.


Information on hazardous substances present at the enterprise, including their generic name and, if necessary, also their classification, indicating their principal hazardous properties

Hydrazine hydrate – clear, colourless to yellowish hygroscopic liquid with a faint odour of ammonia. This is a flammable, toxic, reactive liquid. During particularly hot days and strong heating of the liquid, explosive heavier-than-air mixtures form. They hold by the ground and, in the case of ignition, fire can be whipped over a long distance. Ignition occurs upon contact with hot surfaces, sparks or an open flame. After exceeding the boiling temperature, thermal decomposition takes place to form hydrogen and ammonia.

Hydrogen – extremely flammable, explosive colourless gas, lighter than air. Well miscible with air. It reacts violently with air, oxygen, halogens and strong oxidants. It reacts with metal catalysts.

Oxygen – colourless, odourless gas. Non-flammable, non-toxic, can react suddenly, greatly oxidises organic substances. Strongly supports combustion.

Petroleum derivatives: diesel fuel – diesel and motor oil are generally referred to as petroleum derivatives and they are recorded as specific highly hazardous substances in table I, annex 1 of act. 277/2005 Coll. They are flammable liquid hydrocarbons. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +21° C. The average density of diesel fuel ranges around 820 kg/m3. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +60° C – +80° C. The average density of motor oils ranges around 910 kg/m3.

Petroleum derivatives: Oils – major fire hazard in the engine room are turbine oils used both for the purposes of greasing and cooling, as well as for regulation purposes. According to available statistics, the main cause of fires in engine rooms is the leakage of oil from pressurised piping and its contact with rotating machine elements, electrical instruments and equipment and with unprotected (thermally uninsulated) pipes or with pipes with damaged thermal insulation.

Nitric acid – colourless to yellow liquid of characteristic odour. Strongly oxidising and reacts violently with flammable and reducible materials, upon heating it decomposes to nitrogen oxides. It is corrosive for metals, reacts violently with organic compounds, which may cause fire or explosion. It causes irritation and serious damage to the skin, eyes and mucous membranes.


Date of last control check at the plant pursuant to § 24: 11/2018


Information on how to get more detailed information in accordance with § 15 (8) and (9)

Ing. Rajmund Kerak
Specialist for prevention of major industrial accidents

t: +421 33 597 2781
m: + 421 910 674 963
rajmund.kerak@seas.sk

Name and address of business

SLOVENSKÉ ELEKTRÁRNE, a.s.
Mochovce nuclear power plant, branch
935 39 Mochovce


Operator’s business name and registered office

Slovenské elektrárne, a.s.
Mlynské nivy 47, 821 09 Bratislava 2


Information on compliance with requirements of § 5 (notification to the district office in the county seat)

Enterprise classified in category A. Notification on the enterprise’s classification was sent to the competent district office on 19.10.2015


Information on the enterprise’s current activity

Mochovce nuclear power plant (EMO), branch is an organisational unit of the joint-stock company Slovenské elektrárne.

The power plant produces and supplies electricity and heat. It operates two nuclear units with pressurized water reactors VVER 440 / V 213 with a capacity of 2 x 470 MW.

The first unit of the power plant has supplied electricity to the grid since summer 1998; the second unit since the end of 1999.

The third and fourth EMO unit is under construction.

The Mochovce nuclear power plant has two operating units, each with installed capacity of 470 MW. They operate in baseload regime and anciliary service regime in the electricity grid and their average annual electricity production ranges around 7,400 GWh.

The Mochovce 1,2 nuclear power plant is one of a group of power plants with a pressurised water energy heterogeneous reactor in which the fission reaction takes place predominantly through the action of thermal neutrons. Slightly enriched uranium dioxide is used as the fuel. The moderator and concurrently also the coolant is demineralised water containing boric acid.


Information on hazardous substances present at the enterprise, including their generic name and, if necessary, also their classification, indicating their principal hazardous properties

Hydrazine hydrate – clear, colourless to yellowish hygroscopic liquid with a faint odour of ammonia. This is a flammable, toxic, reactive liquid. During particularly hot days and strong heating of the liquid, explosive heavier-than-air mixtures form. They hold by the ground and, in the case of ignition, fire can be whipped over a long distance. Ignition occurs upon contact with hot surfaces, sparks or an open flame. After exceeding the boiling temperature, thermal decomposition takes place to form hydrogen and ammonia.

Hydrogen – extremely flammable, explosive colourless gas, lighter than air. Well miscible with air. It reacts violently with air, oxygen, halogens and strong oxidants. It reacts with metal catalysts.

Oxygen – colourless, odourless gas. Non-flammable, non-toxic, can react suddenly, greatly oxidises organic substances. Strongly supports combustion.

Petroleum derivatives: diesel fuel – diesel and motor oil are generally referred to as petroleum derivatives and they are recorded as specific highly hazardous substances in table I, annex 1 of act. 277/2005 Coll. They are flammable liquid hydrocarbons. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +21° C. The average density of diesel fuel ranges around 820 kg/m3. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +60° C – +80° C. The average density of motor oils ranges around 910 kg/m3.

Petroleum derivatives: Oils – major fire hazard in the engine room are turbine oils used both for the purposes of greasing and cooling, as well as for regulation purposes. According to available statistics, the main cause of fires in engine rooms is the leakage of oil from pressurised piping and its contact with rotating machine elements, electrical instruments and equipment and with unprotected (thermally uninsulated) pipes or with pipes with damaged thermal insulation.

Nitric acid – colourless to yellow liquid of characteristic odour. Strongly oxidising and reacts violently with flammable and reducible materials, upon heating it decomposes to nitrogen oxides. It is corrosive for metals, reacts violently with organic compounds, which may cause fire or explosion. It causes irritation and serious damage to the skin, eyes and mucous membranes.


Date of last control check at the plant pursuant to § 24: 5/2016


Information on how to get more detailed information in accordance with § 15 (8) and (9)

Ing. Mariana Mančíková
Specialist for prevention of major industrial accidents

t: +421 36 636 3816
m: + 421 910 673 150
mariana.mancikova@seas.sk

Name and address of business

SLOVENSKÉ ELEKTRÁRNE, a.s.
Nováky power plant, branch
972 43 Zemianske Kostoľany


Operator’s business name and registered office

Slovenské elektrárne, a.s.
Mlynské nivy 47, 821 09 Bratislava 2


Information on compliance with requirements of § 5 (notification to the district office in the county seat)

Enterprise classified in category A. Notification on the enterprise’s classification was sent to the competent district office on 28.10.2015.


Information on the enterprise’s current activity

The Nováky power plant (ENO), branch is an organisational unit of the joint-stock company Slovenské elektrárne.

The Nováky power plant, branch (hereinafter the “plant”) through the combustion of Slovak brown coal produces superheated steam for steam turbines driving electric generators, hot water and technological steam for the neighbouring industrial plants and for heating purposes of Prievidza, Novák, the Zemianske Kostoľany and hot water along the route from ENO to Prievidza. Within the power grid, the plant operates in baseload and semi-peak regimes.

The main production facilities at ENO B units 1, 2, 3, 4 are for steam, single-drum boilers with natural water circulation, with dry combustion chamber, high-pressure, twin-stroke with interstage steam resuperheater. In the corners of the combustion chamber on units 1, 2, 3, 4 there are slit pulverised coal burners feeding into the combustion space. The ignition and stabilisation of the combustion process on the boilers is ensured by stabilisation burners with pressure sprays for heavy heating oil ignition, located on the walls of the combustion chamber.


Information on hazardous substances present at the enterprise, including their generic name and, if necessary, also their classification, indicating their principal hazardous properties

Hydrazine hydrate – clear, colourless to yellowish hygroscopic liquid with a faint odour of ammonia. This is a flammable, toxic, reactive liquid. During particularly hot days and strong heating of the liquid, explosive heavier-than-air mixtures form. They hold by the ground and, in the case of ignition, fire can be whipped over a long distance. Ignition occurs upon contact with hot surfaces, sparks or an open flame. After exceeding the boiling temperature, thermal decomposition takes place to form hydrogen and ammonia.

Hydrogen – extremely flammable, explosive colourless gas, lighter than air. Well miscible with air. It reacts violently with air, oxygen, halogens and strong oxidants. It reacts with metal catalysts.

Oxygen – colourless, odourless gas. Non-flammable, non-toxic, can react suddenly, greatly oxidises organic substances. Strongly supports combustion.

Petroleum derivatives: diesel fuel – diesel and motor oil are generally referred to as petroleum derivatives and they are recorded as specific highly hazardous substances in table I, annex 1 of Act. 277/2005 Coll. They are flammable liquid hydrocarbons. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +21° C. The average density of diesel fuel ranges around 820 kg/m3. In terms of the fire-technical characteristics of diesel fuel, the most significant is its flashpoint temperature of around +60° C – +80° C. The average density of motor oils ranges around 910 kg/m3.

Petroleum derivatives: oils – Major fire hazard in the engine room are turbine oils used both for the purposes of greasing and cooling, as well as for regulation purposes. According to available statistics, the main cause of fires in engine rooms is the leakage of oil from pressurised piping and its contact with rotating machine elements, electrical instruments and equipment and with unprotected (thermally uninsulated) pipes or with pipes with damaged thermal insulation.

Petroleum derivatives: mazut – this is a heavy fuel oil and is actually a distillation residue of heavy hydrocarbons from petroleum. At ENO it is used for stabilising combustion in the case of a boiler below the minimum output. At high temperatures mazut has similar properties as those of flammable liquids. The maximum consumption of mazut at ENO is approx. 10 000 kg / hour.


Date of last control check at the plant pursuant to § 24: 6/2019


Information on how to get more detailed information in accordance with § 15 (8) and (9)

Jozef Gramantík
Specialist for prevention of major industrial accidents

t: +421 46 560 2410
m: + 421 910 673 857
jozef.gramantik@seas.sk