LEGISLATIVE Councillor and anti-nuclear campaigner the Reverend Fung Chi-wood is demanding that everyone in the area between the border, Tai Po and Sheung Shui be told to shelter if there is an accident at Daya Bay.
Mr Fung says it is ''only reasonable'' that the 500,000 people in the towns nearest the plant - within about 30 kilometres - should be warned to go indoors if a radiation cloud is leaking out.
He will meet the Secretary for Security, Alistair Asprey, next Thursday to put forward his demand.
The Government says in its Daya Bay Contingency Plan public booklet that ''sheltering and evacuation will not be required'' for those beyond a 20 km evacuation zone, which covers sparsely-populated Ping Chau and Mirs Bay.
However, Dr Ray Yeung Man-kit, of Hong Kong University, says his research shows everyone in the territory could be up to 100 times more likely to contract cancer later in life if they stay on the streets, where they could be exposed to radiation.
The Government's Security Branch says its emergency plan was drawn up to International Atomic Energy Agency (IAEA) guidelines.
But Mr Fung, a member of the Legislative Council's Environmental Affairs Committee, said the consultancy study done by the UK Atomic Energy Authority in 1987 on how to plan for a nuclear catastrophe was unclear on its recommendations for sheltering.