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When should decay heat be removed from the reactor core to prevent fuel damage?
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What is the purpose of the control rod?
The control rods in a nuclear reactor are simply neutron absorbers which can be raised or lowered, this enables the reactor to be maintained at criticality with the chain reaction proceeding at a steady rate. The reactor loses reactivity between refuellings which are probably every two years, so the control rods have to be slowly withdrawn to compensate. They are also fully inserted very quickly should the safety instruments require it, and the reactor then stays shutdown. (Reactor scram or trip)
What are some advantages to using a fusion reactor to produce electricity?
it should be radiologically cleaner than fission
Can a nuclear reactor be used as a nuclear weapon?
No. LLNL even tested several Uranium-Hydride bombs in the 1950s. Even though their computer models said the devices should explode, none gave a nuclear yield. One could use the waste from the reactor as a Radiological Weapon, but the reactor itself is not useful as a weapon.
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.
What is a dangerous by over heating inside a nuclear reactor?
When nuclear reactors are operated at high power levels the fission process produces a lot of heat, and the reactor coolant system removes that heat to prevent the heat from building up to the point that the fuel melts or is otherwise damaged. When the reactor coolant system develops a problem (perhaps one or all coolant pumps stop due to interruption of the electrical power supplied to them) the system detects this and automatically inserts control rods to turn off the fission process (a reactor SCRAM or TRIP). Unfortunately, this does not turn off the decay of fission products that were produced when the reactor was operating at power. Since the fission products already exist, and their decay is inevitable, the heat production is going to happen, regardless of the presence of a means to remove that heat. If the emergency cooling systems should fail (as they did at Fukushima following the earthquake and tidal wave) then the heat production could cause the fuel to eventually melt its way through the bottom of the reactor vessel and through the containment concrete below that and in to the environment. This would release large amounts of radioactivity into the environment that could be very dangerous to anyone in the vicinity.
When control rods are withdrawn in Pressureize water reactor in what pattern should the sets be in?
they are usually removed one after the other to maintain stability
Do Ipods need to be kept in a leather case to prevent damage?
Ipods should be protected if possible,a case will prevent scratches.
What should be pushed up or removed to prevent an accident in the class?
Googles or long sleeves
Should stems be left on oranges?
Well depending upon if you are going to eat it you really shouldn't eat a stem, but beforehand you can leave it on until you eat it. Normally, in harvesting, stems are removed to prevent damage to other fruit.
Why do tugboats have tires on them?
The tires on the sides of the tugboat prevent damage to boats being guided by the tug if it should bump against them. They also prevent damage to the tug from bumping against seawalls and so on.
Why should defective concrete be immediately repaired on new or old concrete?
to prevent further damage
What should be removed from the paint striper before flushing to prevent static electricity buildup?
Spray Tips
Why should the culture tube be held at a 45 degree angle when the top has been removed?
To prevent contamination.
What are some tips for the management of asbestos?
If one has asbestos in a building one should get a qualified technician to inspect for any damage to the asbestos. If there is no damage, it can be left but must be monitored. If damage is present, the area containing asbestos should repaired or the asbestos removed by a professional.
To prevent personnel injury or damage you should perform troublshooting corrective actions in the?
order shown in the TO troubleshooting checklist
You are preparing to tow an outboard boat What should you do to prevent damage to the engine while on the road?
Raise the engine and secure it
Why it is necessary to be alert and prevent any damage to the environment?
if even one element of the environment is disturbed or damaged, it has an effect on its relationship with other elements, and the balance of the environment as a whole is disturbed. Thus we should be alert and prevent any damage to the environment
