Senior executives of CLP Power are scratching their heads over how to release more information on what they said were insignificant events at Daya Bay nuclear power station, saying no such minor incidents overseas are reported as if they were emergencies. Their comments came after Secretary for Security Ambrose Lee Siu-kwong told lawmakers yesterday that the government was in talks with the power company and Guangdong authorities on how to perfect the cross-border notification system so that more information on minor incidents could be released to improve transparency. The moves have been made in response to safety concerns over Daya Bay after media reports in June said a suspected fuel rod crack caused a slight increase in radioactivity in the cooling water at reactor unit two of the station on May 23. The plant in Shenzhen is just 50 kilometres northeast of Hong Kong. Richard Lancaster, managing director of CLP Power, yesterday said they were open-minded about suggestions on how to improve the system as long as this would not cause unnecessary panic among the public, with excessive technical information provided. 'If it is reported in a simple way and completely taken out of context, it might scare everybody,' Lancaster said, adding that 'no one elsewhere reports below-scale events but we will consult to see how best this can be done'. Lancaster reiterated that based on the International Nuclear Event Scale adopted by the International Atomic Energy Agency, the May 23 incident was a 'below-scale' event that did not have to be reported to the Hong Kong authorities immediately. Nevertheless, the minor incident was later notified to the mainland-appointed Daya Bay Nuclear Safety Consultative Committee, which has a number of Hong Kong professionals as members. It was included in the monthly report filed with the board of directors of the Hong Kong Nuclear Investment Company (HKNIC), a subsidiary of CLP Power which holds a 25 per cent stake in the Daya Bay station. Members of the board, including the permanent secretaries of the security and environment bureaus or their representatives, just met last week and were briefed about the incident. Chan Siu-hung, HKNIC's managing director, said the amount and types of information released should be considered carefully. 'We don't want to overdo it and we have to strike a balance between information released and its appropriateness,' he said. Chan said they reviewed overseas practices and found no reporting system for minor incidents. In particular, he said, the French authority told them it was 'quite impossible' for them to report a 'below-scale' event to the bordering Belgian authority. However, Dr Rianne Teule, a nuclear campaigner with Greenpeace International, asked if the May 23 incident was truly below-scale since the international scale itself was 'arbitrary' and up to the operator to interpret. 'One of the three barriers was breached at the Daya Bay accident. It can actually fit level one,' she said. Teule said transparency was far from adequate in the Daya Bay incident and no information was given on the levels of contamination, how the contaminated cooling water was dealt with and what exposure risks it would pose to the workers.