According to statistics, however, a reactor would have to be in operation for 1 to 10 million years before there is a chance of any serious accident occurring.
防護措施精密，意外發生可能性少鄭振華進一步解釋，我國核能電廠使用的反應爐屬於輕水型反應器，也就是以普通水為冷卻劑的機組。