Table of Contents
- 1 Which parts of a nuclear reactor must be removed and replace periodically?
- 2 In which of the following reactor it is possible to add remove and process the reactor fuel during reactor operation?
- 3 Can a nuclear reactor be turned off?
- 4 Can a nuclear reactor explode like a bomb?
- 5 How many types of nuclear reactors are there?
- 6 How is fuel refueled at a nuclear power plant?
- 7 How is steam released from a nuclear reactor?
Which parts of a nuclear reactor must be removed and replace periodically?
The heat is used to generate steam. 5. Which parts of a nuclear reactor must be removed and replaced periodically? fuel rods 6.
In which of the following reactor it is possible to add remove and process the reactor fuel during reactor operation?
Due to fluid form of fuel it is possible in homogeneous reactor that reactor fuel can be added removed and reprocessed during reactor operation without shutting in town.
What happens in a nuclear reactor when a control rod is removed?
If all control rods are fully removed, reactivity is significantly above 1, and the reactor quickly runs hotter and hotter, until some other factor slows the reaction rate. Control rods are partially removed from the core to allow the nuclear chain reaction to start up and increase to the desired power level.
What are the components of a nuclear reactor?
Components of a nuclear reactor
- Fuel.
- Moderator.
- Control rods or blades.
- Coolant.
- Pressure vessel or pressure tubes.
- Steam generator.
- Containment.
Can a nuclear reactor be turned off?
During the power operation of a nuclear power plant, a self-sustaining chain reaction occurs in the reactor core. To shut down a nuclear power plant, the reactor must be brought into a permanently uncritical state (subcriticality) and the heat that continuous to generate must be discharged safely.
Can a nuclear reactor explode like a bomb?
It’s obvious now that it’s impossible for a nuclear reactor to explode like an atomic bomb. However, other accidents can occur in the nuclear reactor and lead to explosions. One example is hydrogen explosion where hydrogen build-up in the reactor core causes a hydrogen explosion.
Where is reactor used?
Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid (water or gas), which in turn runs through steam turbines. These either drive a ship’s propellers or turn electrical generators’ shafts.
How does a uranium nucleus split into two?
When a free neutron hits the nucleus of a fissile atom like uranium-235 (235U), the uranium splits into two smaller atoms called fission fragments, plus more neutrons. Fission can be self-sustaining because it produces more neutrons with the speed required to cause new fissions. This creates the chain reaction.
How many types of nuclear reactors are there?
Six types of reactor (Magnox, AGR, PWR, BWR, CANDU and RBMK) have emerged as the designs used to produce commercial electricity around the world.
How is fuel refueled at a nuclear power plant?
The refueling process, like everything else, is different at every plant, but basically, the fuel is lifted with a crane, and moved to the Spent Fuel Pool where it gets stored. All manipulations are done with the fuel under water. Typically, plants only refuel 1/3 of the core for each refueling outage.
What happens when a nuclear reactor is shut down?
Tripping the reactor causes control rods to be inserted into the core, which stops the chain reaction and the Nuclear Reactor is officially shutdown. Once the plant is shutdown, the core is still actually making heat, called decay or residual heat. The amount of heat will keep dropping exponentially, but it does have to be removed for cooling.
What happens when the reactor head is on the stand?
Once the head is on the stand, operators refill the reactor and the refueling cavity. Once the refueling cavity is filled to the top, the plant is in a very safe state, and minimal supplemental cooling is needed to keep the fuel cool. At this point in the outage, nearly the entire plant is disassembled and inspected or repaired/replaced.
How is steam released from a nuclear reactor?
The heat from the core boils the water, and the steam is released to the atmosphere. RHR recirculates the water from the core through a heat exchanger, and back to the core. RHR is used only when the core has already been sufficiently cooled and depressurized using AFW.