Photo: Daya Bay Nuclear Power Operations & Management Co., Ltd

Safe operation is the top priority for all nuclear power stations. As in other modern nuclear power stations, Daya Bay has in place duplicated sets of systems with the same safety function, so that if one system fails, the back-up system can take over. In the event of an emergency due to equipment failure or human error, auxiliary equipment is ready to step in and maintain plant safety functions. This effectively minimises the chances of any adverse impacts of Daya Bay to its environment.

Different monitoring systems in place to keep track of the performance of the reactor, its cooling systems, and safety systems. By monitoring various key safety indicators such as temperature and pressure within the reactor, it enables the plant operator to take immediate corrective measures when necessary.
To ensure effective cooling, a modern nuclear power station like Daya Bay is supported by multiple main and back-up power sources such as the Guangdong grid, CLP power grid and on-site diesel generators. In case of power outage, the reactor can make use of steam-driven water pump to maintain cooling.

Several engineering systems such as pipes, pumps, storage tanks and heat exchangers that work under different situations are in place to continue cooling the nuclear fuel even after the reactor has shut down, so as to remove any residual heat in the reactor.