Containment Structure

Question 1

Difference between sleeved and unsleeved penitratiins

Answer 1

Sleeved penetrations are designed for multiple pipes or single pipes that carry fluid >150F. Unsleeved penetrations are designed for single pipes that carry cold fluids <150F.

Question 2

What temperature requires containment integrity to be set?

Answer 2

Set whenever reactor coolant temperature exceeds 200F.

Question 3

Describe the emergency escape manway.

Answer 3

It is an 18” manually operated hatch on the lower center of the interior door with a double set of O-Rings and test connections to check for leakage

Question 4

How do you check the double O-Ring seals for leakage.

Answer 4

Pressurizing the space between them and performing a drop / flow test.

Question 5

What operates the lock pin on the inner and outer door.

Answer 5

Containment IA supply’s air to operate the inner door lock pin.

Service IA provides air to operate the outer door lock pin.

Question 6

Containment liner and wall thicknesses?

Answer 6

Foundation Mat: .25” steel 10ft concrete
CTMT wall: .375” steel 4.5’ concrete
CTMT dome: .5” steel 2.5’ concrete

Question 7

Boundaries of fission product release

Answer 7

Containment
RCS
Fuel cladding