Reactor Theory Definitions

5. Thermal neutrons are neutrons which are in thermal _______________ with the atoms in the surrounding medium.
7. Neutrons are classified by their ____________.
8. __________ have slightly greater mass than protons and have no charge.
11. Can be thought of as the probability of interaction between a target atom and a neutron.
12. Besides uranium, _______________ is another fuel present in BWRs.
13. The mass of an atom is less than the sum of the masses of its constituent parts. This difference in mass is called _____________.
14. ___________ exhibit a positive charge.
15. The average energy release per __________ of U-235 is 200 Mev.

1. They make up approximately 0.64% of the fission neutrons from U 235 and are born more than 10 14 seconds after fission.
2. The energy associated with the radioactive decay of the fission products is called _________.
3. Alpha, Photo and Spontaneous fission neutrons are examples of ___________ neutrons.
4. The macroscopic cross section is defined as the ______________of an incident neutron interacting with a target nucleus per unit length of travel of the incident neutron.
6. Neutron _________ is defined as the total distance traveled by all of the neutrons in a specific energy band in one cm3 during one second.
8. Electrons orbit the nucleus and are _____________ charged
9. They make up approximately 99.36% of the fission neutrons from U 235 and are born within 10 14 seconds of fission
10. The___________of an atom consists of neutrons and protons.