UN Secretary General Ban Ki-moon on Wednesday called for a worldwide review of nuclear safety standards during a trip to the Chernobyl exclusion zone.

"The standards of nuclear safety should be fully reviewed. The IAEA (International Atomic Energy Agency) must work carefully in this direction. The world community must consider the advantages and disadvantages that nuclear energy brings and to protect nuclear facilities from terrorism," Ban said.

The world must raise awareness of nuclear safety, said Ban, who was visiting the site of the Chernobyl nuclear power disaster in the country.

Ban said it was necessary to consider the "physical protection" of nuclear materials and protect them from terrorist attack.

"We will have a high-level meeting in June with this aim. And in September we expect to hold a world leaders summit, devoted to strengthening world nuclear security," he said.

Ban was in the country to attend a week of commemorative activities marking the 25th anniversary of the nuclear disaster.