Thursday July 25 5:43 PM EDT One Dead in at Ukraine Nuclear Plant Accident KIEV, Ukraine (Reuter) - Two accidents in three hours hit one of Ukraine's five nuclear power stations, killing a man, causing contamination and sparking new worries about safety 10 years after the Chernobyl disaster. Viktor Stovbun, a senior official at Ukraine's nuclear power authority Derzhkomatom, said a worker died of burns and other injuries when a pipe carrying steam broke and struck him on Wednesday at the Khmelnitsky station in western Ukraine. In a second incident, a staff error caused radioactive water to leak into and contaminate a nitrogen storage area. ``During a water pressure test, a steam pipe ruptured near one of the employees and it struck him on the head. He was badly burned and later died,'' Stovbun said by telephone Thursday. ``In the second incident, staff failed to check a seal. Water entered another pipe carrying nitrogen and then fell into a nitrogen storage area.'' Stovbun said the second incident rated one on the zero to seven international scale of nuclear ``events.'' The 60 square foot contaminated area had been cleaned up and there had been no release of radiation outside the plant, 180 miles west of Kiev. Any nuclear incident is a highly sensitive matter in Ukraine 10 years after the explosion and fire at Chernobyl, held responsible for at least 4,300 deaths. Ukraine has pledged to close Chernobyl's two working reactors by the year 2000. The two incidents in Khmelnitsky's sole reactor, closed for maintenance for the past three months, once again raised the issue of whether the former Soviet republic was operating its network of 15 reactors safely. ``The reactor has been stopped for maintenance since April 20 and was supposed to be brought back on stream in the next few days,'' Nelya Senchuk, an engineer, said by telephone from the station. ``But after these incidents, it cannot be ruled out that Derzhkomatom will delay reconnecting it.'' The directors of all five nuclear stations were attending a meeting in Kiev Thursday and senior Derzhkomatom officials were unavailable for comment. A series of incidents have plagued their operations in recent months. A small amount of radiation leaked at Chernobyl this month and a similar incident occurred in April on the eve of the 10th anniversary of the disaster. Environment Minister Yuri Kostenko said safety standards had fallen and said part of the blame lay with the Group of Seven (G7) nations for failing to clarify how they would help Ukraine complete the shutdown of Chernobyl. Under an agreement reached with G7 last year, Ukraine is to receive more than $3 billion in grants and credits to close the plant, but government ministers say the money is not being released quickly enough to get started. Nuclear power already accounts for up to 40 percent of electricity generated in Ukraine and plans call for the industry to be developed. Two reactors, 80 percent complete, are to be built at the Khmelnitsky and Rivne stations within two years to compensate for those to be decommissioned at Chernobyl. Ministers say $840 million alone is needed to complete these new reactors. Ukraine's small environmental lobby said the latest incidents proved the country needed alternative energy sources. ``The new reactors to be built are no different from those in service,'' said Kostyantyn Buzadzhi of Greenpeace Ukraine. ``It is irresponsible to develop Ukraine's nuclear industry.''