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We Have Begun the Construction of a Hot Water Distribution System from Temelín to České Budějovice

The design phase of the South Bohemian regional city ecological heating project has been completed and the construction can begin. On Friday the groundbreaking ceremony of the Temelín Nuclear Power Plant – České Budějovice heat supply main 26 km in length was conducted. Power engineers plan that the construction work will be finished in less than two years. Temelín should start heating the regional city for the first time in the 2020/2021 heating season.
One of major benefits of the Temelín hot water distribution system should be the reduction of CO2 emissions by 80,000 tons a year. However, the citizens of České Budějovice will have to wait for this positive effect approximately two years. According to power engineers, this is the time needed for the construction of the third longest hot-water distribution system in the Czech Republic.
According to civil engineers 50 – 80 people on average will work on the construction site in long shifts including weekends. “We place a high priority on this project; therefore, we have earmarked a significant part of our technical equipment and professional staff on its implementation. The deadline is tight but manageable. We can build on our expertise on heating network construction projects in the total length of hundreds of kilometres,” said Michal Hrubý, Managing Director of Tenza, according to whom this Sough Moravian company has also constructed the heat supply mains from Elektrárna Dětmarovice to Bohumín and from Praha Libeň to Holešovice.
The pipes will be laid at a sufficient distance from the road to prevent any traffic disruptions in the surroundings. “It will not be necessary to break the road surface where the hot-water distribution system intersects the road as the pipes will be pushed under the road. A special machine will bore a tunnel reinforced with a steel pipe one meter in diameter through which the hot-water supply system will lead.” said Michal Hrubý. The only affected part of the road will be approximately 100 meters in one lane close to Hluboká nad Vltavou in the direction from Týn nad Vltavou. The project also includes replanting.
Two preinsulated pipes 26 km in length and with outer diameter of 80 cm will connect Temelín with the regional city. The outer diameter of the return pipe from České Budějovice to the power plant will be 10 cm smaller. Both pipes will be laid minimum 1.3 metre under the ground mostly along the road connecting Týn nad Vltavou and České Budějovice. A greater distance will be necessary only in the vicinity of the Křivonoska Pond. The hot water distribution system will also include two pumping stations located outside the power plant premises and three pipe bridges. In spite of the extraordinary length, specialists expect minimum heat losses. The most modern materials having excellent insulation properties and long service life will be used. Heat losses should be reduced to approximately three per cent. In winter hot water having up to 140°C will flow to České Budějovice, in summer the temperature of 90°C will be sufficient.
ČEZ and Teplárna České Budějovice signed the Contract for Heat Deliveries at the end of last year. According to the Contract the nuclear power plant will be providing heat for the regional city for at least twenty years. In the opinion of the Mayor of České Budějovice the deliveries of heat from Temelín are advantageous for the city from the point of view of environmental protection, price and diversification of heat sources. “We do not want to increase payments for heat for the end customers and we also do not want to be dependent on the price of coal. During the negotiations about the price of heat from Temelín we received price comparable with that for heat generated in our heat and power plant. Therefore, we will not be purchasing at a higher price.” said Jiří Svoboda.
It is expected that heat from Temelín will meet approx. 30 per cent of heat consumption in České Budějovice. The remaining part will be provided by the heat and power plant of the city including 100 per cent backup supply in the event of possible heat supply disruption from Temelín. “Temelín will function as one of generation sources of the České Budějovice heat and power plant; customers will, therefore, not find any difference. We will receive heat from Temelín in the central transformer station on the Vltava River from where it will be distributed through our distribution system which is in an excellent condition and we continuously invest in it. On our part the receipt of heat from Temelín should not pose any problem,” said Tomáš Kollarczyk, Vice-chairman of the Board of Directors of Teplárna České Budějovice.
The annual volume of deliveries is expected to reach 750 TJ, while especially the housing estates Vltava, Šumava, Máj and Pražské předměstí should be heated from Temelín.