Nuclear Fuel - .5

Question 1

Name 5 ways to check fuel orientation.

Answer 1

1. Orientation Boss pointing at rod.
2. Serial numbers, the bottom points towards the rod.
3. Bail form a diamond.
4. Channel clips in.
5. Channel buttons touching.

Question 2

What contributes to Inter-Granule Stress Corrosion Cracking?

Answer 2

Iodine and Cadmium

Question 3

Describe Barrier Fuel.

Answer 3

1. Pure Zirconium layer (softer, less interaction).
2. Minimizes pellet-clad interaction.

Question 4

Describe PCIOMR Limits
(Pre-Conditioned Interim Operating Management Recommendations)

Answer 4

1. Threshold power PCI not likely below this power.
2. Envelop power. Limit ramp rates to .11 (kw/ft)/hr above this power.

Question 5

What is the purpose of the Plenum Spring?

Answer 5

Forces fuel pellets downward to ensure that they do not cock/shift.

Question 6

What is the purpose of the Gas Plenum?

Answer 6

Volume to minimize internal gas pressure rise due to fission product gasses.