REACTOR PROTECTION SYSTEM (RPS)

Question 1

What happens if RC-P-1A trips and VBA is lost?

Answer 1

A reactor trip occurs because RPS sees no pumps operating in the same loop for flux to pumps.

Question 2

What components make up the Reactor Trip Module (RTM)?

Answer 2

Channel trip relay, 2 of 4 logic, output logic relays, and manual bypass relays.

Question 3

What is the required action if RPS minimum degree of redundancy is not met?

Answer 3

Restore redundancy within 1 hour or be in Hot Shutdown (HSD) in 6 hours.

Question 4

During continuous rod withdrawal, which RPS setpoint is hit first?

Answer 4

The RPS pressure setpoint.

Question 5

What happens if NI-6 fails high during startup and rod testing?

Answer 5

RPS Channel “B” trips on high power, with the flux trip set to 5%.

Question 6

What occurs if Loop A RCS flow fails to 0 lbm/hr?

Answer 6

An RPS channel trip is triggered.