Selection of outdoor meteorological parameters in nuclear power plant HVAC design

The selection of outdoor meteorological parameters in NPP HVAC design has been in nonstandard state for long time. The nuclear island HVAC design commonly complies with American codes and the conventional island and BOP complies with Chinese national codes, which are sometime contradictory. Analyses and compares the HVAC codes of the two countries, conducts statistical calculation about an actual example and analyses the results, obtains that it is more conservative to select outdoor meteorological parameters according to the Chines codes, and suggests that the outdoor meteorological parameters selection should comply with the domestic codes in future NPP HVAC designing.