pressurized water reactor; PWR
Technical term in nuclear engineering; refers to a type of light-water reactor where primary coolant water is kept under high pressure to prevent boiling.
The pressurized water reactor is the most common type of nuclear reactor in the world.
Boiling water reactor (BWR); unlike a PWR, the coolant water boils directly in the reactor core.
Compound of 加圧 (pressurization) + 水 (water) + 炉 (reactor/furnace), directly describing the reactor type.