0
Control rods absorb neutrons Would they be inserted or removed to speed up a reaction?
Wiki User
∙ 14y ago
Yes, control rods absorb neutrons. They would be removed to speed up a reaction, however, in most commercial power plants, control rods are not used to control reactivity above about 25% thermal power - the recirculating water pumps are used instead.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
The way a reactor works and the theory behind nuclear reaction?
A nuclear reactor is composed of several parts:Fuel - fissionable material, typically enriched UraniumModerator - material to rapidly slow fast fission produced neutrons to thermal neutrons, to prevent too many from being captured by non-fissionable Uranium-238 (not used in fast reactors using HEU fuel).Control rods - boron or cadmium rods that absorb excess neutrons, they can be inserted or removed to adjust the reaction rate.Coolant - any material to carry heat out of the core (e.g. water, liquid metals, air).Emergency systems - SCRAM system for emergency reaction shutdown, emergency cooling system to remove decay heat from core after SCRAM, etc.Operator instrumentation and controls - allows operators to interact with the reactor remotely.A nuclear fission chain reaction happens when fissionable fuel Uranium-235 or Plutonium captures a thermal neutron. It quickly splits into two fission fragments and 2 to 6 fast neutrons (the average being between 2 to 3 neutrons). The moderator slows the fast neutrons to thermal neutrons and the reaction continues.
What does the Marena website have to offer?
the Merena website offers a birth control alternative which boasts about being 99% effective. The birth control device is inserted or removed by your healthcare provider.
What would happen if the control rods were removed from the reactor core?
Typically the reaction rate increases.
How does light water nuclear reactor work?
U235 in the fuel captures a neutron and fissions and emits 2 or more fast neutrons per fission.U238 in the fuel captures some of these fast neutrons before the moderator (water) can slow them to thermal speeds.Fast neutrons are slowed to thermal speeds (so that U238 can no longer capture them) by repeatedly bouncing off the molecules of the moderator (water).Control rods capture some of the thermal neutrons.Some fast and thermal neutrons escape the reactor core.The above process repeats over and over; if the reactor is exactly critical steps 2, 4, and 5 eliminate the excess neutrons emitted in step 1 making the reaction rate constant and in equilibrium.To adjust the reaction rate higher the control rods are removed slightly so they capture fewer neutrons, making the reactor ever so slightly supercritical until it finds a new equilibrium state and becomes exactly critical again. To adjust the reaction rate lower the control rods are inserted slightly so they capture more neutrons, making the reactor ever so slightly subcritical until it finds a new equilibrium state and becomes exactly critical again.Fission in step 1 and neutrons bouncing off water molecules in step 3 generates heat which is used to produce steam to turn turbines which turn generators to make electricity.
Can a solid state drive be inserted and removed from a computer?
Yes
What type of reaction occurs when water is removed?
When water is removed, dehydration is a type of reaction that occurs.
What is the chemical reaction called where water is removed during the reaction?
This chemical reaction is called dehydration.
How do you get the banana out of the bottle of rum?
Once the banana is inserted into the rum bottle, it cannot be removed.
What reaction happens in desalination?
Salt is removed.
What would happen if the excess acetic anhydride is not removed in the reaction vessel?
If the excess acetic anhydride is not removed in the reaction vessel an unwanted reaction will occur. The acetic anhydride will react causing esterification.
What is the name given to the reaction where oxygen is removed from a chemical?
This reaction can be called "deoxidation" or "reduction".
What was the results of the sepoy mutiny?
It removed the East India Company from control
