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Exams > 2018 Q15 — SG Tube Leak MS10 Setpoint Adjustment

2018 Q15 — SG Tube Leak MS10 Setpoint Adjustment

⚠️ DRAFT
Q15 — SG Tube Leak MS10 Setpoint Adjustment 039 MRSS-G2.2.2 (4.6)
Given:
- 21 SG has a confirmed tube leak
- The crew is preparing to adjust 21MS10 (MS PWR RELIEF Vlv) setpoint in accordance with S2.OP-AB.SG-0001 (Steam Generator Tube Leak)

Which ONE of the following completes the statements below?

The PO will set the 21MS10 setpoint to _(1)_ psig by depressing button _(2)_.
A. (1) 1045    (2) A
B. (1) 1045    (2) B
C. (1) 1070    (2) A
D. (1) 1070    (2) B
▶ Show Answer & Explanation
✓ A. Correct. For Part 1, IAW S2.OP-AB.SG-0001 Step 3.31, the 21MS10 setpoint will be set to 1045 psig. For Part 2, button A will be depressed on the 21MS10 controller to raise the setpoint.
✗ B. Part 1 is correct. For Part 2, button B on the 21MS10 is used to raise the manual output to the valve so it opens more. Consequently, the candidate could incorrectly conclude that button B actually raises the controller's setpoint.
✗ C. For Part 1, 1070 psig is a familiar pressure (setpoint for MS15 Main Steam Safety Valve). The candidate could incorrectly conclude that the MS10 controller will be adjusted to 1070 psig. Part 2 is correct.
✗ D. For Part 1, 1070 psig is a familiar pressure (setpoint for MS15 Main Steam Safety Valve). The candidate could incorrectly conclude that the MS10 controller will be adjusted to 1070 psig. For Part 2, button B on the 21MS10 is used to raise the manual output to the valve so it opens more. The candidate could incorrectly conclude that button B actually raises the controller's setpoint.
Ref: NOS05ABSGTL-05 (Steam Generator Tube Leak) | LO: NOS05ABSGTL-05 — Describe the actions taken in S1/S2.OP-AB.SG-0001 and the bases for the actions | Source: New | Cognitive: Higher (Analysis)

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