Q49 — TRIP-1 Immediate Actions
EPE: 007 EK2.02 (2.6)
Given:
• Unit 1 is at 100% Reactor Power and stable
At time 10:00:00
• A valid AUTOMATIC reactor trip signal is generated by RPS but the Reactor Trip Breakers do NOT open
At time 10:00:05
• The Immediate Actions of 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) have been initiated
◦ BOTH Reactor Trip Switches have been actuated
◦ BOTH Reactor Trip Breaker Bezels have been actuated
◦ The Reactor Trip Breakers are still closed
In accordance with 1-EOP-TRIP-1, which ONE of the following completes the statement below?
Assuming any actions performed after 10:00:05 will be successful, the crew's NEXT actions will be to
• Unit 1 is at 100% Reactor Power and stable
At time 10:00:00
• A valid AUTOMATIC reactor trip signal is generated by RPS but the Reactor Trip Breakers do NOT open
At time 10:00:05
• The Immediate Actions of 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) have been initiated
◦ BOTH Reactor Trip Switches have been actuated
◦ BOTH Reactor Trip Breaker Bezels have been actuated
◦ The Reactor Trip Breakers are still closed
In accordance with 1-EOP-TRIP-1, which ONE of the following completes the statement below?
Assuming any actions performed after 10:00:05 will be successful, the crew's NEXT actions will be to
A. initiate Rod Insertion and then perform a MAIN STEAM ISOLATION
B. open Breakers 1E 6D and then perform a MAIN STEAM ISOLATION
C. initiate Rod Insertion and then actuate the TURBINE TRIP Switch
D. open Breakers 1E 6D and then actuate the TURBINE TRIP Switch
▶ Show Answer & Explanation
✓ D. Correct. IAW 1-EOP-TRIP-1, after the crew has actuated the Reactor Trip Switches and Reactor Trip Breaker Bezels, the crew's NEXT actions will be to open Breakers 1E 6D and 1G 6D then actuate the TURBINE TRIP Switch.
✗ A. Incorrect but plausible. All of the distractors are part of the immediate actions of Trip-1. Consequently, all of the distractors are plausible.
✗ B. Incorrect but plausible. All of the distractors are part of the immediate actions of Trip-1. Consequently, all of the distractors are plausible.
✗ C. Incorrect but plausible. All of the distractors are part of the immediate actions of Trip-1. Consequently, all of the distractors are plausible.
Ref: 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) | LO: NOS05TRP001-08 LO 16 | Source: Bank | Cognitive: Lower
Connections
- Related systems: RPS/SSPS, Control Rod Drive
- Related EOPs: EOP-TRIP-1 — Reactor Trip or Safety Injection
- Related exam: 2018 NRC Written Exam