Q35 — GDT Release 2R41 Auto Closure
071 WGS-A3.03 (3.6)
Given:
• A 24 Gas Decay Tank (GDT) release is in progress in accordance with S2.OP-SO.WG-0011 (DISCHARGE OF 24 GAS DECAY TANK TO PLANT VENT)
At time 12:00
• 2R41 Channel A and Channel D High Radiation Alarms are received in the Control Room
Which ONE of the following completes the statement below?
At 12:00, ___ will AUTOMATICALLY close which will terminate the 24 GDT release.
• A 24 Gas Decay Tank (GDT) release is in progress in accordance with S2.OP-SO.WG-0011 (DISCHARGE OF 24 GAS DECAY TANK TO PLANT VENT)
At time 12:00
• 2R41 Channel A and Channel D High Radiation Alarms are received in the Control Room
Which ONE of the following completes the statement below?
At 12:00, ___ will AUTOMATICALLY close which will terminate the 24 GDT release.
A. 24WG34 (GDT STOP TO PLNT)
B. 2WG39 (GDT TO VENT HOR STOP V)
C. 2WG38 (GDT VENT CONTROL VALVE)
D. 2WG41 (GDT VENT CONT V)
▶ Show Answer & Explanation
✓ D. Correct. 2WG41 will automatically close when the 2R41 Channel D High Radiation Alarm actuates.
✗ A. Incorrect but plausible. All of the distractors are valves that are open during a 24 GDT release. Consequently, the candidate could incorrectly conclude that any one of the given WG valves would automatically close when 2R41 Channel D High Radiation Alarm actuates.
✗ B. Incorrect but plausible. All of the distractors are valves that are open during a 24 GDT release. Consequently, the candidate could incorrectly conclude that any one of the given WG valves would automatically close when 2R41 Channel D High Radiation Alarm actuates.
✗ C. Incorrect but plausible. All of the distractors are valves that are open during a 24 GDT release. Consequently, the candidate could incorrectly conclude that any one of the given WG valves would automatically close when 2R41 Channel D High Radiation Alarm actuates.
Ref: NOS05WASGAS-10 (Radioactive Waste Gas) | LO: NOS05WASGAS-10 (Radioactive Waste Gas), Obj 5 — Outline the interlocks associated with the following Radioactive Waste Gas System components: d. Radioactive Gaseous Waste Release Valve 2WG41 | Source: New | Cognitive: Fundamental/Memory
Connections
- Related systems: Waste Gas, Radiation Monitoring
- Related procedures: S2.OP-SO.WG-0011 — Discharge of 24 Gas Decay Tank to Plant Vent
- Related exam: 2019 NRC Written Exam