Tuesday, October 5, 1999 Published at 17:05 GMT 18:05 UK
Accident at South Korea nuclear plant
Wolsung 3 had minor incidents in the past
An inquiry has been launched in South Korea after 22 workers at a nuclear plant were exposed to radiation after a coolant leak.
Ministry officials said the exposure - the first-ever case of group contamination in South Korea - was "not that severe".
About 45 litres of so-called "heavy water" leaked, the ministry said. "It did not leak outside of the building. It did not affect the environment," the ministry said in the statement.
Those who were exposed to the radiation were employees of Korea Electric Power Corp, which runs one of the three nuclear power plants in Wolsung.
The state-owned company operates a total of 14 nuclear power plants.
Nuclear power dependency
Environmental groups have been calling for tighter controls and checks for several years.
The plant where the accident happened went live in July last year.
South Korea relies heavily on nuclear power for its electricity - 40% is produced by nuclear power plants.
Echoes of Japan accident
That accident happened when workers mixing a uranium solution triggered a nuclear chain reaction at a uranium processing plant.
Fifty-five people, mainly plant workers and emergency personnel who responded to the Tokaimura accident, were exposed to the radiation and three remain in serious condition.
South Korean Government officials said after Japan's incident that they did not anticipate similar accidents in Korea.