The HKO operates an ACAS to assess the possible consequences of nuclear accidents with release of radioactive materials at the nuclear power stations.
Based on meteorological data from weather stations within and in the vicinity of Hong Kong and information on the magnitude of the radiological release, the ACAS simulates the transport and dispersion of the released radioactive materials and predicts the radiation dose that may affect different parts of Hong Kong.
Simulation of plume dispersion
Products of the ACAS include:
1. Radioactive plume track;
2. Time integrated effective dose and thyroid dose;
3. Ground contamination; and
4. Time integrated nuclide concentration in air.