The NEOLANT Group of companies, the developer of the software and hardware package, Digital Decommissioning has completed the first two phases of the Project 44: Development of an equipment dismantling project in the controlled access areas of Kozloduy nuclear power plant, units 1-4.
The Kozloduy Nuclear Power Plant operates in Bulgaria at the Danube River, some 200 kilometers north of the country's capital of Sofia, and five kilometers east of Kozloduy, the town after which the station is named.
In 1966, the governments of Bulgaria and the former Soviet Union signed an agreement to cooperate on the construction of the Kozloduy plant. Construction began four years later as a joint project of Teploelektroproekt of Moscow and Energoproekt of Sofia.
In 1974, the station began operating with an output 220MWe of electrical power. The Soviet Union and later Russia supplied and handled the nuclear fuel. During the years of 1991 to 2002, the station grew to six power units with a total capacity of 3,760MWe, which covered 45% of country's need for electrical energy.
The Kozloduy plant currently manages two pressurized water reactors, with a total output of 2,000MWe. The older and smaller Units 1 to 4 were shut down by 2007. Units 5 and 6, constructed in 1987 and 1991, are VVER-1000 reactors. As part of a program to extend its life by 30 years, Unit 5 was in 2017 upgraded to a capacity of 1,100MWe. A seventh 1,000 MWe unit may be installed using a reactor from the terminated Belene project, for which Bulgaria paid €600 million.
When Bulgaria candidated for EU membership, it was required to satisfy EU conditions for nuclear plant safety, and so the first four nuclear power units will be decommissioned. The remaining two VVER-1000 reactor units (5 and 6) were successfully upgraded during 2005-2006, and so meet EU safety requirements.
Customer: State Enterprise Radioactive Waste (SE RAW), Republic of Bulgaria
Decommissioning: Russian-German consortium comprising of GC NEOLANT, JSC NIKIMT Atomstroy, NUKEM Technologies GmbH, and EWN GmbH
Period of implementation: 2016-2019
Kozloduy is the first nuclear power plant decommissioning in Europe to use information technology to support the back-end stage of nuclear power plant units, thereby increasing the economic and technical significance of the project.
Project 44: Development of an equipment dismantling project in the controlled access areas of Kozloduy nuclear power plant, units 1-4
Stage 1. A radiation survey that included the following tasks in Building 1 and the reactor compartment of Unit 1:
Stage 2. The development of 3D engineering and radiation models:
Stage 3. Development of design documentation for dismantlement of systems and equipment of Building 1 and the reactor compartment of Unit 1