Neutrons

Question 1

What is the mass of Neutrons

Answer 1

1

Question 2

Where are neutrons located in the atomic structure?

Answer 2

Nucleus

Question 3

What is a Fast neutron?

Answer 3

Any neutron born of fission

Question 4

What is the energy level of fast neutrons

Answer 4

> 0.1 MeV

Question 5

What is the energy level of intermediate neutrons

Answer 5

Between .1Mev to1eV

Question 6

What is the energy level of slow neutrons

Answer 6

<1eV

Question 7

Define a thermal neutron

Answer 7

A neutron at the same energy level as its surroundings

Question 8

What is a Prompt Neutron

Answer 8

A neutron born before 10E-14 sec.

0.00000000000001

Question 9

What is a delayed neutron

Answer 9

Born after 10E-14, usually about 12.7sec.

Question 10

What is critical

Answer 10

When you are creating the same number of neutrons this cycle as the cycle before

Question 11

What is subcritical

Answer 11

Producing less neutrons this cycle than the previous cycle

Question 12

What is supercritical

Answer 12

Producing more neutrons this cycle than the previous cycle

Question 13

What is atomic mass?

Answer 13

Number of Protons and Neutrons

Question 14

What is the atomic Number?

Answer 14

The number of Protons

Question 15

What is the atomic mass of a Proton

Answer 15

1

Question 16

What charge dose a Proton have

Answer 16

Positive

Question 17

What charge does an electron have

Answer 17

Negative

Question 18

Name three source neutrons

Answer 18

Installed source
Alpha-Neutron Reaction
Photo-Neutron Reaction

Question 19

Name two neutron interactions

Answer 19

Scattering (collision)

Absorption

Question 20

What is elastic scattering

Answer 20

When a neutron collides with a target nucleus and bounces off.

Question 21

What is inelastic scattering?

Answer 21

When a neutron collides with a target nucleus and enters for a short time then a neutron is released from the nucleus.

Question 22

What is radiative capture?

Answer 22

When a neutron collides with a poison and is absorbed, no fission accrues.

Question 23

What is fission?

Answer 23

When a neutron collides with a target nucleus causing the target nucleus to split into two nuclei of different sizes and it gives off an average of 2.5 neutrons.

Question 24

What are the two origins of neutrons

Answer 24

Fission

Source

Question 25

What is the production (release) time for a Delayed Neutron?

Answer 25

>10E-14 sec. | About 12.7 sec.

Question 26

What is the six factor formula?

Answer 26

``` E Lf P Lth F N E= fast fission. + Lf= Fast fission non-leakage. - P= Resonance non-losses. - Lth= Thermal non-leakage. - F=Thermal neutrons absorb by non fuel atoms. - N= Reproduction. + ```

Question 27

What is the Keff if the reactor is subcritical?

Answer 27

<1

Question 28

What is the Keff if the reactor is critical?

Answer 28

Keff =1

Question 29

What is the Keff if the reactor is supercritical?

Answer 29

>1

Question 30

What holds protons and neutrons together in the nucleus?

Answer 30

Binding energy or nuclear energy.

Question 31

What percent of neutrons are prompt.

Answer 31

>99%

Question 32

What is moderation?

Answer 32

The slowing down of a neutron.

Question 33

What charge do Neutrons have?

Answer 33

None