Energoproekt's Experience in the Nuclear Power Plant Design

The Nuclear Power Plant Kozloduy is the first nuclear power plant in Bulgaria and Southeastern Europe. The activities, related to the project execution started since the end of 60s of the last century. After detailed technical and economical assessment the building platform was chosen upon the Danube river near Kozloduy town. The plant was designed by Toploelektroproekt – Moscow and ENERGOPROEKT – Sofia. The main equipment was supplied from former Soviet Union, and individual installations – from former German Democratic Republic, Czechoslovakia and Hungary.

In the beginning of 1970 started constructing of the main corpus of NPP Kozloduy. The reactor hall, machinery section, ventilation center and the electrical devices of the 440-MW units are situated in it.

The construction and putting into operation of the nuclear powers of the Bulgarian nuclear power plant was implemented at three stages:

  • І stage: 1970 – 1975: Construction and putting into operation of the Units No 1 and 2 with pressurized water reactors ВВЕР-440, with total electric power 440 MW, each. The Unit No 1 was put into operation in 1974, and the Unit No 2 – in 1975.
  • ІІ stage: 1973 – 1982: Construction and putting into operation of the Units No 3 and 4 with pressurized water reactors ВВЕР-440, also with total electric power 440 MW, each. The Unit No 3 was put into operation in 1980, and the Unit No 2 – in 1982.
  • ІІІ stage: 1980 – 1991.: Construction and putting into operation of the Units No 5 and 6 with reactors ВВЕР-1000, with total electric power 1000 MW, each. The Unit No 5 was put into operation in 1987, and the Unit No 6 – in 1991. NPP Kozloduy is the most important electrical power plant in Bulgaria. When all the six units were into operation, the plant were producing more than 45 % of the total electrical power, generated in the country. In relation with the engagements of Bulgaria for association of the country to the European Union, NPP Kozloduy prematurely stopped operating of the first four energy units, as follows: Units No 1 and 2 were stopped at the end of 2003.

At the present only the Units No 5 and 6 are under operation. In spite of that even now NPP Kozloduy produces more than 30 % от of the total electrical power, generated in the country.

Design and consultancy services performed by ENERGOPROEKT PLC during the last years:

  • Depot for public and building waste with adjacent treatment installations;
  • Local waste water treatment plant of units 1&4;
  • Treatment installations for wastewater of compound collector;
  • Treatment plant at NPP Kozloduy – 5 and 6 units;
  • Workshop for processing and preservation of radioactive waste;
  • Warehouse for preservation of radioactive waste;
  • Storehouse for preservation of contaminated ground;
  • Heat exchanging station for heating of consumers – Kozloduy;
  • Cooling line of the vacuum pumps in the Heat exchanging station
  • Heating supply of apartment building;
  • Replacement of amortized sections of yard network;
  • Stabilization of the terrain northwards of Outdoors Switchgear;
  • Replacement of amortized sections of yard network;
  • Reconstruction of the 1st and 5th floors;
  • Cooling of the tanks with mount nozzles;
  • Heating supply of apartment buildings;
  • Replacement of pipelines from yard network of Kozloduy;
  • Ensuring with the necessary quality of fire-precaution cases;
  • Work design for replacement of steam-ejecting with absorption machines;
  • Control of moisture, density, speed and direction in the embankments;
  • Development of software product for assessment of isolation oils;
  • Modernization of the radiation control systems;
  • Modernization Berthold;
  • Control of moisture, density and direction of filtration;
  • Study and elaboration of designs for the necessary additional connections for ensuring of steam for technical needs and heating of the platform and external sites with stopped units 1 to 4;
  • Study and elaboration of designs for the necessary additional connections for ensuring of steam for technical needs and heating of the platform and external sites with stopped Units 1 to 4 in NPP Kozloduy.

ENERGOPROEKT also is co-author of the initial design for construction of the second nuclear power plant – NPP Belene.

The platform of NPP Belene was approved for construction in 1981. At the end of 1980 and the beginning of 1981 ENERGOPROEKT – Sofia prepared documentation for Engineering reclamation and preparation of the building platform. In accordance with work designs reclamation of the platform land started at the beginning of 1982.

Real building of the future electrical power plant started in 1987 after the designs of Atomenergoproekt – Kiev and ENERGOPROEKT – Sofia. The design provide for building of 4 units. During the period 1988 – 1990 was executed significant part of the activities for constructing of the first unit and was supplied the biggest part of the main equipment. In 1990 the project was stopped, and on the platform were executed only preservation works.

At the end of 2002 the Cabinet made decision for continuation the work for construction of NPP Belene.

Енергопроект АД

ENERGOPROEKT JSC
51, James Boucher Blvd., 1407 Sofia, Bulgaria
Phone. +359 2 960 78 00

VAT № BG 831367237
UIC 831367237

Board of Directors:
Nikola Stoilov
Jivko Jeliazkov
Magdalena Ilkova

Financial Director:
Rusko Kuzmov