Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

4602 > Reactor Theory Review-Neutrons > Flashcards

Reactor Theory Review-Neutrons Flashcards

1
Q

What charge do neutrons have?

A

None.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where is the neutron located in an atom?

A

In the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What charge does an Electron have?

A

Negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What charge does a proton have?

A

Positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the location of the electron in an atom?

A

Orbiting the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the location of a proton in an atom?

A

In the nucleus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a fast neutron?

A

A neutron that has a charge greater than 0.1MeV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a prompt neutron?

A

A neutron born before 10 to the minus 14sec

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is Atomic Mass Number?

A

The number of protons and neutrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the atomic number?

A

The number of protons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the mass of a proton?

A

1.00727 amu.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the mass of a neutron?

A

1.00866 amu

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the mass of an electron?

A

0.00055 amu

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the neutron interactions for scattering?

A

elastic

inelastic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the neutron interactions for Absorbtion?

A

Fission,

Radiative capture.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

If you have 12 electrons in an stable atom how many protons would you have?

A

12

17
Q

What determines what element an atom is?

A

The number of protons.

18
Q

If you have the same number of protons but different number of neutrons then you have a different what?

A

Isotope

19
Q

What are the types of naturally accruing neutrons?

A

Photo

Alpha

20
Q

What is the difference between elastic scattering and inelastic scattering?

A

Elastic scattering the neutron just bounces off the target nucleus.
Inelastic scattering the neutron joins the target nucleus for a short time then a neutron exits the target nucleus.

21
Q

What is the difference between Radiative capture and Fission?

A

Radiative capture the neutron enters the target nucleus and stays there no fission.
Fission is when a Neutron enters the target nucleus and then the nucleus becomes unstable and breaks into two fission fragments and also gives off extra neutrons.

22
Q

What is a thermal neutron?

A

A neutron that is at equilibrium with my surroundings.

23
Q

All fission neutrons are slow or fast?

A

Fast

24
Q

What is the difference between Prompt and Delayed neutrons?

A

Prompt neutrons are neutrons that are produced before 10 to the negative 14th seconds.
Any neutrons that are produced after are delayed neutrons.

25
Q

Why is water a good moderator?

A

Cost effective.
Abundant.
It has similar mass.

26
Q

What are the two types of neutron reactions?

A

Scatter

Absorbtion

27
Q

When an neutron collides with a target nucleus what 4 things can happen?

A

Elastic scattering
Inelastic scattering
Radiative capture
Fission

28
Q

What neutrons are fast neutrons prompt or delayed?

A

Both.

29
Q

What percent of neutrons are prompt and delayed?

A

99% prompt

1% delayed

30
Q

What would be the effect of using only prompt neutrons?

A

Power changes would happen to fast you would not be able to control the reactor. That’s why you need delayed neutrons.

31
Q

What is Keff?

A

The number of neutrons in this generation compared to the number in the last generation.

32
Q

Keff = 1

A

Stable the number of neutrons this generation is the same a the number of neutrons in the last generation. (Critical)

33
Q

Keff = >1

A

The number of neutrons in this generation is greater than the number of neutrons in the last generation. (Super critical).

34
Q

Keff = <1

A

The number of neutrons in this generation is less than the number of neutrons in the last generation. (Sub critical).

35
Q

What are the two factors in the neutron life cycle that are positives?

A

Fast fission factor.

Reproduction factor.

36
Q

What is Neutron Flux?

A

The amount of neutrons in a square centimeter per sec

37
Q

What are the two major way that we change reactivity?

A

Resonance losses - we change RCS temperature.

Thermal neutrons absorbed - we use control rods and boron concentration.

4602 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions