Q49 — EOP-TRIP-1 Immediate Actions [OUTDATED]
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 10:00:03
• The Immediate Actions of 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) have been initiated
In accordance with 1-EOP-TRIP-1, which ONE of the following completes the statements below?
At 10:00:03, the RO will attempt to manually trip the Reactor by FIRST actuating the _(1)_.
If the Reactor can NOT be tripped using the Trip Breaker BEZELS or the Reactor Trip Switches, the crew's NEXT action will be to _(2)_.
• 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 10:00:03
• The Immediate Actions of 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) have been initiated
In accordance with 1-EOP-TRIP-1, which ONE of the following completes the statements below?
At 10:00:03, the RO will attempt to manually trip the Reactor by FIRST actuating the _(1)_.
If the Reactor can NOT be tripped using the Trip Breaker BEZELS or the Reactor Trip Switches, the crew's NEXT action will be to _(2)_.
A. (1) Trip Breaker BEZELS (2) initiate Rod Insertion
B. (1) Trip Breaker BEZELS (2) open Breakers 1E 6D and 1G 6D
C. (1) Reactor Trip Switches (Pistol Grips) (2) initiate Rod Insertion
D. (1) Reactor Trip Switches (Pistol Grips) (2) open Breakers 1E 6D and 1G 6D
▶ Show Answer & Explanation
✓ D. Correct. 1-EOP-TRIP-1 IMMEDIATE ACTIONS are expected to be performed from memory and in order. For Part 1 and IAW 1-EOP-TRIP-1 Step 1, the RO will attempt to trip the Reactor manually by FIRST actuating the Reactor Trip Switches. For Part 2 and IAW 1-EOP-TRIP-1 Step 1, if the Reactor can NOT be tripped using the Trip Breaker BEZELS or the Reactor Trip Switches, the crew's NEXT action will be to open Breakers 1E 6D and 1G 6D.
✗ A. For Part 1 and IAW EOP-TRIP-1, actuating the Reactor Trip BEZELS is the second option to trip the reactor manually. Consequently, the candidate could incorrectly conclude that using the BEZELS is the actual first required immediate action. For Part 2, initiating Rod Insertion is part of the Immediate Actions of EOP-TRIP-1 (Step 2.2). Consequently, given the plant conditions, the candidate could incorrectly conclude the crew's NEXT action is to initiate Rod insertion.
✗ B. For Part 1 and IAW EOP-TRIP-1, actuating the Reactor Trip BEZELS is the second option to trip the reactor manually. Consequently, the candidate could incorrectly conclude that using the BEZELS is the actual first required immediate action. Part 2 is correct.
✗ C. Part 1 is correct. For Part 2, initiating Rod Insertion is part of the Immediate Actions of EOP-TRIP-1 (Step 2.2). Consequently, given the plant conditions, the candidate could incorrectly conclude the crew's NEXT action is to initiate Rod insertion.
Ref: 1-EOP-TRIP-1 (Reactor Trip Or Safety Injection) | LO: NOS05TRP001-08 (REACTOR TRIP OR SAFETY INJECTION) | Source: New | Cognitive: Lower
Connections
- Related systems: RPS/SSPS, Control Rod Drive
- Related EOPs: EOP-TRIP-1 — Reactor Trip or Safety Injection
- Related exam: 2019 NRC Written Exam