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Exams > 2018 Q30 — Dropped Rod Withdrawal Speed

2018 Q30 — Dropped Rod Withdrawal Speed

⚠️ DRAFT
Q30 — Dropped Rod Withdrawal Speed 014 RPIS-A4.02 (3.4)
Given:
• The crew is recovering a dropped Control Bank A Rod in accordance with S2.OP-AB.ROD-0002 (Dropped Rod)
• The ROD BANK SELECTOR SWITCH has just been placed in CBA

Which ONE of the following completes the statement below?

With the ROD BANK SELECTOR SWITCH in CBA, the dropped rod will be withdrawn at ___ steps per minute in small increments per reactor Engineering guidance.
A. 72
B. 64
C. 48
D. 8
▶ Show Answer & Explanation
✓ C. Correct. With the ROD BANK SELECTOR SWITCH in CBA, the dropped rod will be withdrawn at 48 steps per minute.
✗ A. Incorrect but plausible. 72 steps per minute is maximum speed for withdrawing rods when the ROD BANK SELECTOR SWITCH is in AUTO. Consequently, the candidate could incorrectly conclude that with ROD BANK SELECTOR SWITCH in CBA, the dropped rod will be withdrawn at 72 steps per minute.
✗ B. Incorrect but plausible. 64 steps per minute is the speed for withdrawing rods when the ROD BANK SELECTOR SWITCH is in SBA, SBB, SBC or SBD. Consequently, the candidate could incorrectly conclude that with ROD BANK SELECTOR SWITCH in CBA, the dropped rod will be withdrawn at 64 steps per minute.
✗ D. Incorrect but plausible. 8 steps per minute is minimum speed for withdrawing rods when the ROD BANK SELECTOR SWITCH is in AUTO. Consequently, the candidate could incorrectly conclude that with ROD BANK SELECTOR SWITCH in CBA, the dropped rod will be withdrawn at 8 steps per minute.
Ref: NOS05RODS00-12 (ROD CONTROL AND POSITION INDICATION SYSTEMS) | LO: 11 — Identify and describe the Control Room controls, indications, and alarms associated with the Rod Control and Position Indication Systems | Source: New | Cognitive: Lower

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