0
In commercial power plants steam generators can measure up to 70 feet (~21m) in height and weigh as much as 800 tons. Each steam generator can contain anywhere from 3,000 to 16,000 tubes, each about three-quarters of an inch (~19mm) in diameter. The coolant (treated water), which is maintained at high pressure to prevent boiling, is pumped through the nuclear reactor core. Heat transfer takes place between the reactor core and the circulating water and the coolant is then pumped through the primary tube side of the steam generator by coolant pumps before returning to the reactor core. This is referred to as the primary loop.
That water flowing through the steam generator boils water on the shell side to produce steam in the secondary loop that is delivered to the turbines to make electricity. The steam is subsequently condensed via cooled water from the tertiary loop and returned to the steam generator to be heated once again. The tertiary cooling water may be recirculated to cooling towers where it sheds waste heat before returning to condense more steam. Once through tertiary cooling may otherwise be provided by a river, lake, or ocean. This primary, secondary, tertiary cooling scheme is the most common way to extract usable energy from a controlled nuclear reaction.
These loops also have an important safety role because they constitute one of the primary barriers between the radioactive and non-radioactive sides of the plant as the primary coolant becomes radioactive from its exposure to the core. For this reason, the integrity of the tubing is essential in minimizing the leakage of water between the two sides of the plant. There is the potential that, if a tube bursts while a plant is operating, contaminated steam could escape directly to the secondary cooling loop. Thus during scheduled maintenance outages or shutdowns, some or all of the steam generator tubes are inspected by eddy-current testing. sry if this didnt help im only thirteen sry sry sry sry
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What is the role of reactive power in a power system?
To supply the reactive power demand of load and to regulate of output volage at the grid
Does an electric circuit what role would the power plants that provide electricity for homes be?
the sourceA+
What role does the sun have on how heat is transferred?
Due to nuclear reaction in the sun it emits enormous heat ,and heat does not require any medium to transfer.
What is the role of civil engineering in the solar power plant?
From an engineering perspective, it includes all design criteria for the below ground and above ground activities. This includes: site survey: aerial, radar and topographic geotechnical investigation, studies, analysis and rpeorting hydrology studies and plans site preparation, earth work operations grading plans erosion control plans drainage plans bill of quantities for construction operations roads and access ways fencing landscaping all interfaces with structural design review and compliance in design of all permit criteria for a safe power plant compliance with all country codes for environmentally safe power plant
A design of a typical steam boiler for electric power generation?
In a Power generating plant, steam is produced in a boiler. The boiler is effectively a huge kettle. Generally a boiler has the following subassembly layout: high pressure water flow (>200 bar g, >250 DEG C) enters the economizer inlet headers and then thru the economizer heat exchange pipes to arive in the economizer outlet headers. Main role of the economizer is heat up the water. After the economizer the water runs thru the headers and heat exchange pipes of the evaporator. Here the water vaporizes in to steam. Steam then runs through the headers and heat exchange pipes of generally 2 - 3 superheaters. Between superheaters and after the last superheater is a water injection point to control the temperature of the superheated steam. This layout would be in case of drum boiler, used in small power plants (electric power output not more then 100MW). Now the drum is large barell on top of the boiler where water and steam are separated. In case of large MW rated power plants the boiled does not have a drum. I must also say that when a boiler has a drum it is called a multiple pass boiler. That means that water is circulated through the vaporizer in 2,3 or more cycles until is fully transformed in to steam. In case of large MW rated power plants water passes through the vaporizer only one time and is fully transformed in to steam. This type of boilers are called " once through" boilers or "Benson" type after the name of the inventor. Now to have a view about the actual layout of the heat exchange surfaces here are some facts : - furnace, wih burners, is place where the flame or fire is located. Here temperature is very high ( >900DEG C). Heat surfaces are superheaters. Main heat exchange is done through radiation. Professionals calls this heat exchanger as radiation superheater. - convective superheaters. Called like this because heat exchange is particularly by convective means. The flue gases are cooler here and this is an array of pipes that the flue gases washes them. As I mentioned earlier it can be 2-3 convective superheaters. Steam that comes out from superheaters is run through pipes to the turbine inlet valves. In large MW rated power plants, steam that comes out from the high pressure turbine body is reheated in the boiler. Reheaters are also heat exchange surfaces that are generally intercalated with the superheaters. After reheating the steam is run to the intermediate pressure turbine body. To continue with the heat exchange surfaces layout in boiler, flue gases after washing the superheaters and/or reheaters will wash the evaporator and then the economizer before actually exiting the boiler body. To recover as much heat from the flue gases, after exiting the boiler, flue gases are run through a rotarry or tube heat exchanger. Here, air that is fed to the burners is heted. This way remanent heat of the flue gases is put back in to boiler making it more efficient. So to summarize a boiler is made of ( in order of flue gases pass) : - furnace (radiation superheater, pipes are run by high pressure steam) - convective superheaters ( pipes are run by high pressure steam) - evaporator (pipes are run by a mixture of water and steam) - economizer ( pipes are run by water ) Unlike a huge kettle, modern boilers use tubes filled with water and steam. Contained within a furnace.
Describe the role of steam in a nuclear power plant?
Steam in nuclear power plants is used to drive turbines for generation of kinetic energy.
What is the role of the steam in a nuclear power plant?
It Powers the Huge turbine that produces electricity.
What role do fuel rods play in generating energy?
Fuel rods are the nuclear fuel in a nuclear power plant. They are used to turn water to steam, which is then used to turn a turbine. They do not "generate energy", since energy cannot be created or destroyed (E=mc^2). They are used to generate electricity, or to convert nuclear energy to electric energy.
What is plutonium role in nuclear power?
Plutonium (as dioxide, carbide, mixed oxides or carbides) is an important nuclear fuel for nuclear power reactors.
What is the role of the steam of the stem in the plant?
it keeps the plant stuck in the ground so i won't blow away in the wind and water travells throught it from the roots to the leaves
What role does uranium play in the generation of electricity in the US?
Uranium (as metal, alloy, oxide, carbide, etc.) is the nuclear fuel for the nuclear power reactors.
How is nuclear power energy efficient?
Operating at 98% Efficiency, U.S. Nuclear Plants Play Vital Role in Beating Sweltering Heat Wave
The development of steam power enabled the growth of?
The development of steam power enabled the growth of industries such as manufacturing, transportation (like steam trains and ships), and mechanized agriculture. It played a crucial role in the Industrial Revolution by providing a reliable and efficient source of energy to power machines and revolutionize productivity.
What is the role of water in power generation?
Most nuclear power plants use thermal-neutron reactors. These reactors use what are called thermal or slow neutrons. Water us used in the reactor as a neutron moderator. This means that the water slows down the more energetic, or fast, neutrons. The slower neutrons are more able to cause atoms to undergo fission. In other words, water is used to help control the reaction. For the generation of electricity, the heat of the reaction boils water to produce steam to run the turbines. The turbines turn the generators. About 60-65% of the heat of a typical nuclear power plant is waste energy. Water is used to cool the plant, and then it is put through heat exchangers to discharge the heat into the air or into some nearby lake, river, or ocean. The availability of water is a very important issue in siting a nuclear power plant, and is the reason almost all of them are placed near large bodies of water.
What has the author R W Durante written?
R. W Durante has written: 'Role and direction of nuclear regulatory research' -- subject(s): Government policy, Nuclear energy, Nuclear facilities, Nuclear power plants, Research
What are the responsibilities of an auxiliary plant attendant in a thermal power plant?
When the primary gardener is absent the auxiliary plant attendant assumes the role of attending the plants.
What are the capabilities of a nuclear sub?
This depends on both the role (e.g. missile, attack, research) and class of the submarine. The only thing that defines a submarine as nuclear is that it derives its power from nuclear reactors, it does not need to carry nuclear weapons (although almost all do).Role defines the purpose the submarine was designed to fulfillClass is the specific "model" of the submarine
