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Passive means that something will happen on it's own, depending only on laws of physics, such as gravity or pressure differentials. In this type of system the emergency core cooling systems are not dependent on electric driven water pumps to move coolant water.
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What are the most important parts of a nuclear plant?
reactor, steam turbine, and a (hopefully working) cooling system.
What is the name of the first peaceful nuclear reactor?
The first nuclear reactor used for peaceful purposes was that in Russia (June 1954) and is called Oninsk nuclear power plant. It is the first in the world to generate electricity for an electric power grid system. It produced around 5 megawatts of electric power.
Why do nuclear power plants have three independent water systems?
This is mainly to protect against any possibility of nuclear radioactive material pollution. For example in pressurized water reactor types, the three water systems are:Primary coolant closed system that extracts heat from the nuclear fuel that is undergoing nuclear fission,Secondary coolant closed system that gets heat from the primary coolant system and get converted into steam that goes to spin the turbines and get condensed again in the condenser and returns back again, andUltimate heat sink system that gets water from a river, sea, or ocean to cool and condense the steam passing through the condenser.
How can nuclear reactors be dangerous?
The purpose of a nuclear reactor is to create and sustain a fission chain reaction in order to produce heat to make steam to drive turbines and produce electrical power (extremely simplified explanation). A fission chain reaction is the interaction of neutrons with fissile materials (elements that can be fissioned). Some enriched fuel (such as uranium-238) is introduced into the reactor core. It produces neutrons as radiation. If more fissile material is present ("fuel" such as uranium-235), that interaction repeats to make more neutrons, and so on. A nuclear reactor is designed to sustain a fission chain reaction and control the rate at which that reaction occurs. The nuclear core of a reactor, where the nuclear fuel is, needs to be shielded so that the radiation and any radioactive components inside do not escape into the general environment. The primary radiation type inside the core is neutron radiation. One of the best shields for neutron radiation is a hydrogen-dense substance, thus pure water is often used. Water, if circulated in a heat sink system, also serves as a heat-removal method (cooling system). The enclosure for the core and the water pool is a containment vessel made out of something that is airtight and which shields against other kinds of direct radiation. Steel is a common material, perhaps supplemented by concrete and other reinforcement to guard against being damaged by an earthquake, explosion, or an airplane impact (for example). There is usually an outer containment building that encloses the reactor containment vessel itself. This is a sort of "second line of defense" in case the reactor is breached. Containment buildings are designed to withstand extremely high internal pressures (such as superheated steam) and forces of almost any direction and realistic magnitude. The specific shape of buildings at a nuclear plant are part of their function. The concave towers that are so symbolic of nuclear power are a common design for cooling towers (and not the reactor core itself). Domes are a common shape for reactor containment buildings for a variety of reasons that have mostly to do with encouraging steam condensation.
How is passive and active solar heating systems different from one another?
a passive solar system converts sunlight into thermal energy without using pumps or fans and active solar system captures the suns energy then uses fans and pumps to distribute the heat
How many years of experience do you need to become a nuclear reactor system engineer?
my cousin became a nuclear reactor engineer and he said it was about 12 years
Where does the water go after being heated in a nuclear reactor?
Nuclear reactor heats water making steamTurbines are turned by steamCooling tower condenses spent steam back to waterwater is returned to the nuclear reactorIts actually a bit more complicated than this single closed loop, because the water heated by the nuclear reactor itself becomes slightly radioactive. Because of this radioactivity, for safety reasons a system with two closed loops connected by a heat exchanger is used. In the primary loop the water just keeps circulating between the nuclear reactor and the heat exchanger. In the secondary loop the water circulates as in the steps listed above, but substitute Heat exchanger for Nuclear reactor.
The amount of energy produced during nuclear fission is related to?
It is related to the specific nuclear reactor design including the nuclear fuel amount and the reactor control system and the energy extracting medium (coolant) capacity.
The amount of energy produced during nuclear fission is related to what?
It is related to the specific nuclear reactor design including the nuclear fuel amount and the reactor control system and the energy extracting medium (coolant) capacity.
What to do when system reads fault red?
We need to know what kind of system. Is it your computer, your wrist watch, or a nuclear reactor?
Can you increase the thermal power of a nuclear reactor without changing the core of the reactor?
Yes, we can increase the thermal power of a nuclear reactor without changing the core of the reactor; primarily by:increasing the coolant mass flow rate,modifying the control rod patterns, andupgrading the turbo generator system
What part of a nuclear reactor system contains uranium?
The central active core fuel assemblies.
What are the most important parts of a nuclear plant?
reactor, steam turbine, and a (hopefully working) cooling system.
What safety features are installed in a nuclear power stations?
The most important safety features are the control rods, which can be inserted quickly to shut the reactor down, either automatically in certain faults, or by operator action, and the core emergency cooling system which operates after a reactor trip or scram to remove decay heat from the fuel, and is powered by diesel generators independent of the outside grid connections.
What is the name of the first peaceful nuclear reactor?
The first nuclear reactor used for peaceful purposes was that in Russia (June 1954) and is called Oninsk nuclear power plant. It is the first in the world to generate electricity for an electric power grid system. It produced around 5 megawatts of electric power.
What is effect if nuclear reactor fail?
A meltdown occurs when a severe failure of a nuclear power plant system prevents proper cooling of the reactor core, to the extent that the nuclear fuel assemblies overheat and melt. A meltdown is considered very serious because of the potential that radioactive materials could be released into the environment. A core meltdown will also render the reactor unstable until it is repaired. The scrapping and disposal of the reactor core will incur substantial costs for the operator.
Why is a cooling sysyem necessary in a nuclear reactor?
When we talk about the reactor cooling system, the meaning is usually the system for removing the reactor thermal output and transferring it to the steam raising units. This is obviously the way the reactor power is utilised. There are other cooling systems though, the most important being the emergency cooling system which can remove the reactor after heat, after it has been shutdown. This system can be powered by back up diesel generators if the connection to the grid has been lost. There will also be an emergency cooling system for the secondary containment, should there be a large loss of coolant accident, though this is very unlikely to happen.
