Q71 — EOP-FRCC-2 AFWST Alarm and SG Feeding
E06 Degraded Core Cooling-EK1.3 (3.7)
Given:
• The crew is performing the SG Level Control Steps of 2-EOP-FRCC-2 (Response To Degraded Core Cooling)
• The PO observes the following on the AUX FEEDWATER STORAGE TANK BEZEL (Red Box = VALID ALARM):
In accordance with 2-EOP-FRCC-2, which ONE of the following completes the statements below?
The crew _(1)_ required to shift AFW suction to an alternate source.
If NO INTACT SG is available, the crew can feed a RUPTURED SG _(2)_.
• The crew is performing the SG Level Control Steps of 2-EOP-FRCC-2 (Response To Degraded Core Cooling)
• The PO observes the following on the AUX FEEDWATER STORAGE TANK BEZEL (Red Box = VALID ALARM):
In accordance with 2-EOP-FRCC-2, which ONE of the following completes the statements below?
The crew _(1)_ required to shift AFW suction to an alternate source.
If NO INTACT SG is available, the crew can feed a RUPTURED SG _(2)_.
A. _(1)_ is _(2)_ ONLY
B. _(1)_ is _(2)_ or a FAULTED SG
C. _(1)_ is NOT _(2)_ ONLY
D. _(1)_ is NOT _(2)_ or a FAULTED SG
▶ Show Answer & Explanation
✓ D. Correct. For Part 1, IAW 2-EOP-FRCC-2 Step 12, since only the AFWST LO LEVEL is illuminated, the crew is NOT required to shift AFW suction to an alternate source (need the AFWST LO-LO Level Alarm to switch to the alternate suction source). For Part 2, IAW 2-EOP-FRCC-2 Step 12, If NO INTACT SG is available, the crew can feed a FAULTED SG or RUPTURED SG.
✗ A. For Part 1, since the AFWST Lo Level alarm is valid, the candidate could incorrectly conclude that the crew is required to shift AFW suction to an alternate source. For Part 2, 2-EOP-FRHS-1 (RESPONSE TO LOSS OF SECONDARY HEAT SINK) specifically forbids feeding a FAULTED SG if an INTACT or RUPTURED SG is available. Consequently, the candidate could incorrectly conclude that 2-EOP-FRCC-2 also forbids feeding a FAULTED SG if an INTACT or RUPTURED SG is available.
✗ B. For Part 1, since the AFWST Lo Level alarm is valid, the candidate could incorrectly conclude that the crew is required to shift AFW suction to an alternate source. Part 2 is correct.
✗ C. Part 1 is correct. For Part 2, 2-EOP-FRHS-1 (RESPONSE TO LOSS OF SECONDARY HEAT SINK) specifically forbids feeding a FAULTED SG if an INTACT or RUPTURED SG is available. Consequently, the candidate could incorrectly conclude that 2-EOP-FRCC-2 also forbids feeding a FAULTED SG if an INTACT or RUPTURED SG is available.
Ref: EOP-FRCC-2 (Response To Degraded Core Cooling) | LO: NOS05LOCA02-03 (POST-LOCA COOLDOWN AND DEPRESSURIZATION) | Source: New | Cognitive: Higher
Connections
- Related systems: AFW, Steam Generator & Blowdown
- Related EOPs: EOP-FRCC-2 — Response to Degraded Core Cooling, EOP-FRHS-1 — Response to Loss of Secondary Heat Sink
- Related exam: 2018 NRC Written Exam