Perilous
Times
Higher radioactivity level at Bulgarian nuke plant:
operators
by Staff Writers
Sofia (AFP) April 27, 2011
Engineers detected higher levels of radioactivity in the
containment reactor at Bulgaria's Kozloduy nuclear plant,
prompting a shutdown that prevented any leak, operators said
Wednesday.
"A higher level" of the radioactive gas xenon (Xe 133) was found
during maintenance work on Tuesday morning in the primary circuit
of Reactor 5, which was then shut down, the operators said in a
statement.
While staff on duty were exposed to higher levels of
radioactivity, it still represented less than a tenth of the
annual dose permitted by safety officers.
"No increase in radioactivity was found outside the containment
reactor," the statement added.
The level subsided to normal by the end of the afternoon.
The episode came on the 25th anniversary of the Chernobyl nuclear
disaster when Russian President Dmitry Medvedev said that he had
proposed a new convention on nuclear safety.
Kozloduy is Bulgaria's only nuclear plant, and it shut down four
out of a total six reactors at the behest of the European Union in
2007 due to safety concerns.
The two 1,000-megawatt units that remain in operation at the
37-year-old plant are the most modern, built in 1987 and 1991, and
brought up to date again a decade later.