Bohunice Nuclear Power Plant

The A1 is another nuclear reactor situated on the Jaslovské Bohunice site. The power plant A1 was built between 1958 and 1972, and it was the first nuclear power plant in Czechoslovakia. It was using one experimental reactor KS-150 designed in Czechoslovakia, which used unenriched uranium as a fuel. Refueling was done during operation of reactor, there was no need to shut it down for the fuel replacement, as in conventional reactors. From the beginning, however, there were many problems with the operation of the reactor and a number of accidents occurred, what was related to the experimental design of the reactor. Two serious accident happened at the A1 power plant. First one occurred in 1976, during the replacement of fuel cells. Two people lost their lives during this accident. Second major accident occurred during refueling on February 22, 1977. It was rated as the accident of 4th degree according to INES. After the second major accident, a decision was made to shut down the reactor because it was expensive to repair it after the accident, and the operation of this reactor was inefficient. Czechoslovakia decided to further build conventional Soviet reactors of the VVER type instead, which have higher output with more efficient operational process. A1 power plant was closed and it's undergoing a decommissioning and cleanup process.[1]

As a condition of accession into the European Union (2004) Slovakia was forced to deactivate the two reactors at the V1 plant. A provision in the accession treaty allowed for reactivation in case of an emergency.

V1 plant was exempted from Slovenské Elektrárne sale to Enel and transferred to JAVYS, a national nuclear decommissioning company fully owned by the state. The first reactor was shut down at the end of 2006, the second on the last day of 2008.

The Russia-Ukraine gas dispute in January 2009 disrupted natural gas supplies and electricity generation. On January 10, 2009 the Slovak government ordered the second reactor, then still undergoing a shutdown procedure, to be returned into power-generation-capable mode.[2] Eventually, the reactor was not reconnected to the grid and the final shutdown was resumed.[3]

Bohunice V2 consists of two second generation VVER-440/213 and went online on August 20, 1984 and December 18th 1985, respectively. In November 2010 both reactors were uprated from 440 MW to 505 MW (gross electrical output) and operation is planned to be maintained until 2025.

In May 2009 Slovak Prime Minister Robert Fico and Czech PM Jan Fischer announced construction of a new reactor unit at Bohunice. A partnership of the Slovak Nuclear and Decommissioning Company (JAVYS) and the Czech energy company ČEZ will build the plant at a projected cost of around 3.7 billion Euros. The specification of new reactor has not been settled upon but will be rated at between 600 and 1,600 MWe. Four manufacturers have been mooted as possible suppliers: Mitsubishi, Atomenergoprojekt, Westinghouse and Areva. ČEZ is considering combining this project with their concurrent construction of the third and fourth reactors at Temelín Nuclear Power Station. Such a contract would be worth between 7 and 10 billion Euros. The project of constructing a third and fourth reactor at Temelín was cancelled by ČEZ in April 2013.

• Presentation about decommissioning of A1
• Electricite de France In Running To Build Slovak Nuclear Plant