The reactors at the Bulgarian Kozloduy nuclear power plant are not of the same type as those at Chernobyl, but of the PWR design with better safety features. I wrote back in 2006 that Bulgaria was due to close two more reactors at the Kozloduy nuclear power plant, with severe consequences both in terms of providing for electricity in the Balkans generally and financially in Bulgaria since electricity is sold for hard cash. This was part of the conditions laid down by the European Union for Bulgaria to join it.
There are many issues involved, both social, economic, political and environmental, but I have read a number of implications to the effect that the reactors at the Kozloduy nuclear power station are the same as those at Chernobyl. It has been made clear to me that this is not true, and so I wish to put this part of the record straight now. The reactors at the Kozloduy power plant are of the Pressurized Water Reactor (PWR), (VVER-440: V-230) type, and so are entirely different from the graphite-moderated, water-cooled (RBMK) type at Chernobyl.
The designation of the Kozloduy reactors in the public consciousness is especially sensitive since Bulgaria wishes to re-open the two that were closed at the end of 2006 to ensure its inclusion among the enlargement countries in the EU, which considered them unsafe. President Georgy Parvanov has urged the EU to carry-out a peer revue in order to re-evaluate safety features at the two closed reactors with the view that they be reopened. Parvanov said, "There is not a single survey proving the reactors are unsafe to operate." Bulgaria agreed to close two 440 MW reactors at the Kozloduy nuclear power plant thus leaving them with just two 1,000 MW reactors from the six there were originally at Kozloduy, since the two oldest reactors were shut in 2002.
Mr Parvanov said, "If the Commission decides that it does not have the capacity to conduct such a peer review and assigns the International Atomic Energy Agency (IAEA) (instead), we will agree. We will accept the result of the review."
Apparently, the IAEA had already checked the reactors immediately before they were closed and found no immediate objections to their operational status. However, the EU's own experts decided that the facility could not be upgraded at an acceptable cost. The consequence is that Bulgaria is no longer a principal exporter of electricity within the Balkans, having decreased its exports from 8 billion kWh to just 300 million kWh in 2007. In order to make up for this lost capacity the Bulgarian government has signed an agreement with the Russian company Atomstrolexport to build a new nuclear plant at Belene which is planned to start operating in 2013 (unit 1) and the second unit in the following year.
I shall watch the details of this highly complex and pressing issue unfold with interest.
 "Bulgarian President Wants to reopen Nuclear Plant." The Bulgarian Post: http://bulgaria.the bulgarianpost.com/printarticle.php?id=354
 "Bulgarian leader urges EU to allow reactors' reopening." http://eubusiness.com.news-eu/1201454221.89/