Containment System

Question 1

What are the 3 functions of the containment system?

Answer 1

1. limit release of radioactive fission products to environment during an accident
2. provide biological shielding for personnel during normal and accident conditions
3. provide a means of testing the leak-tightness of the containment vessel and penetrations

Question 2

Function of the containment structure

Question 3

low leakage divider barrier

Question 4

refueling canal drains

Answer 4

allows spray water to drain back to the recirc sump if CTS actuted and minimizes the amount of steam bypassing the ice condenser

Question 5

containment recirculation sump

Answer 5

1. provides flow and NPSH for the RHR and CTS pumps to work in recirc mode
2. during recirc phase water can also be sent to CCP and SI’s for long term cooling

Question 6

purpose and operation of the containment airlock door mechanical interlock

Question 7

how is the weld channel pressurization system placed in to service

Answer 7

1. verify control air in service
2. verify close CA to weld channel air receivers
3. lineup sheet 1
4. open CA to weld channel air receivers
5. valve in air to electric penetrations
6. verify penetrations pressurized locally or by annunciator clearing

Question 8

Phase A signals

Answer 8

1. SI
2. Manual

Question 9

SI Signals

Answer 9

1. Containment pressure high 1 psig
2. pressurizer pressure low 1775 psig
3. steam pressure low 500 psig
4. steam line differential pressure 100 psig
5. manual

Question 10

how do you ensure containment operability for a specified penetration

Question 11

how do you ensure refueling integrity

Answer 11

perform the lineup sheet “refueling integrity”

Question 12

3 subsystems of containment

Question 13

how much ice in the condenser

Answer 13

2.5 million pounds

Question 14

containment penetration and weld channel pressurization purpose

Question 15

3 tasks for aeos with containment

Answer 15

1. stp 10 containment integrity
2. stp 41 refueling integrity
3. place weld channel pressurization in service
4. containment equipment and personell airlock checklist

Question 16

how are penetrations cooled and why

Answer 16

by ccw to prevent spawling

Question 17

how do we monitor containment sump pump operation?

Answer 17

run time meters on cas panel

Question 18

why do we have the canal drains

Answer 18

to get water from upper containment to the recirc sump

Question 19

how do we cool rcs in recirc mode?

Answer 19

rhr to ccw to esw to lake

Question 20

what should you consider when opening the airlock

Answer 20

1. speed, open slowly
2. 2 lights before opening doors
3. look in window for other people
4. check in and out of work control
5. stay out of line of fire
6. inspect seals and lube

Question 21

how are air temps maintained in containment

Question 22

how many turns on CPN 1

how do you verify valves in the right position?

Answer 22

80 turns

green light lit on fuel transfer panel