FR-Z Daily Quiz

Question 1

Why isn’t containment hydrogen concentration checked in FR-Z.1?

Answer 1

Operation of CEQ fans and DIS should prevent any pockets of high hydrogen concentration from forming

Question 2

Why may isolation of main and aux feedwater be warranted in FR-Z.1?

Answer 2

Isolated to a faulted SG to minimized containment pressure rise

Question 3

Why are RCPs secured in FR-Z.1?

Answer 3

To protect the pumps from damage due to loss of cooling following a Phase B

Question 4

When is RHR spray required to be placed in service per FR-Z.1?

Answer 4

If in the recirc mode and less than two CTS pumps are running. Must also have at least one CCP and one SI pump running and 50 min elapsed after event initiation.

Question 5

Why do we check ECA-1.1 not in progress prior to performing FR-Z.1?

Answer 5

ECA-1.1 take priority to conserve RWST water for recirc capabiltiy

Question 6

What are the major action of FR-Z.3

Answer 6

Verify containment ventilation isolation and notify plant engineering of containment rad levels

Question 7

What actions are required to be performed prior to placing DIS in service?

Answer 7

CTS and containment recirc fans operating, and ice condenser air handling units stopped

Question 8

Why is Response to Containment Flooding an Orange Path?

Answer 8

Critical systems and components located above the design flood level may fail if submerged