Table of Contents
What does the top of the pressurizer in pressurized water?
What does the top of the pressurizer in pressurized water reactor consists of at primary system pressure? Explanation: The pressurizer is a pressure vessel with a heater at the bottom and water spray at the top. The top of the pressurizer is filled with steam at primary system pressure.
How does a pressurizer work?
A PWR pressurizer provides the surge volume for the reactor coolant system. If reactor coolant system temperature increases, less dense reactor coolant system water surges into the pressurizer, compressing the steam space and increasing the primary pressure.
What does a pressurizer do in a nuclear reactor?
The pressurizer controls the reactor coolant system to maintain constant pressure, by actuating the electrical heater, spray valve, and relief valve.
Why is pressurizer used in nuclear power plant?
Pressurizer. The (single) pressurizer is used to control the coolant pressure in the primary reactor cooling system to the level that boiling is effectively suppressed inside the RPV. It is part of the primary coolant pressure boundary and its integrity must be maintained.
What is role of pressurizer in nuclear power plant?
Pressurizer is one of the most important components in the nuclear reactor system. Its function is to keep the pressure of the primary circuit. It can prevent shutdown of the system from the reactor accident under the normal transient state while keeping the setting value in the normal run-time.
How do they keep nuclear power plants from over heating?
Boiling water reactors heat the water surrounding the nuclear fuel directly into steam in the reactor vessel, while pressurized water reactors heat the water surrounding the nuclear fuel but keep the water under pressure to prevent it from boiling.
Has CANDU reactor ever failed?
Do Canada’s CANDU reactors have design flaws that could lead to a nuclear accident and release or radiation? Yes. All CANDU reactors have a design flaw that contributed to the explosion of the Chernobyl reactor, which in turn led to the depopulation of a 30km area around the reactor.
Can a CANDU reactor melt down?
A tsunami-tripped power outage — and backup generator failures — cut off pumps that basted cooling water over the Japanese reactor cores, causing at least three of them to commence a meltdown.
What is the function of pressurizer?
Pressurizer. The pressurizer controls the reactor coolant system to maintain constant pressure, by actuating the electrical heater, spray valve, and relief valve.
What is the purpose of pressurizer?
In a PWR a pressurizer functions to maintain the pressure of the primary coolant system in a range such that no boiling occurs in the primary system under normal and transient operations.