Wiktionary
n. A person or thing that pressurizes.
Wikipedia
A Pressurizer is a component of a pressurized water reactor. The basic design of the pressurized water reactor includes a requirement that the coolant (water) in the reactor coolant system must not boil. Put another way, the coolant must remain in the liquid state at all times, especially in the reactor vessel. To achieve this, the coolant in the reactor coolant system is maintained at a pressure sufficiently high that boiling does not occur at the coolant temperatures experienced while the plant is operating or in an analyzed transient. To pressurize the coolant system to a higher pressure than the boiling point of the coolant at operating temperatures, a separate pressurizing system is required. That is the function of the pressurizer.
Usage examples of "pressurizer".
pressurizer Tank in the primary coolant system that keeps the water in liquid form even up to 500 degrees by using heaters and raising the water in the pressurizer to even higher temperatures and pressures.
REACTOR COMPARTMENT Compartment housing the reactor, pressurizer, steam generators, and reactor main coolant pumps.
While Delaney watched, helpless, the level in the pressurizer tank dropped from 65 inches to 10 in less than a minute.
As the level in the pressurizer dropped to zero, water still leaking out of the system, the little water remaining began to boil to steam in the core.
PRESSURIZER LEVEL The level of the PRESSURIZER tank is the main indication of the amount of primary coolant in the primary coolant system.
A loss-of-coolant accident is detected by a falling pressurizer level.
The commander smiled again behind his impact visor, and the flitter, pressurizers hissing in the background, steadied on zero zero five.