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Exams > 2023 Q65 — SI / SSPS Train Disagreement Indication

2023 Q65 — SI / SSPS Train Disagreement Indication

⚠️ DRAFT
Q65 — SI / SSPS Train Disagreement Indication T3 G2.1.31 (4.6)
Given:
- Salem Unit 1 experienced a valid demand for a reactor trip and Safety Injection (SI)
- The RO suspects that only one Train of SI actuated

Which of the following indications would corroborate that one train of SI failed to actuate?

The "SI & FW ISOL" Red lamp on 2RP4 panel will be (1) and the "SI RESET" Green bezel light on the failed Train of Safeguards on 2CC1 console will be (2) .
A. (1) Flashing (2) LIT
B. (1) Flashing (2) Extinguished
C. (1) LIT (2) Extinguished
D. (1) LIT (2) LIT
▶ Show Answer & Explanation
✓ A. Correct. The "SI & FW ISOL" Red lamp on 2RP4 would be flashing indicating SSPS train disagreement and that one Train of SI has failed to actuate. Also, the "SI RESET" Green light on the train that failed to actuate will be LIT.
✗ B. Plausible because the "SI & FW ISOL" Red lamp on 2RP4 would be flashing indicating SSPS train disagreement and that one Train of SI has failed to actuate. The SI RESET light would be extinguished but for the Train that did actuate.
✗ C. Plausible because "SI & FW ISOL" Red lamp on 2RP4 would be LIT solid if both trains of SI did actuate and the SI RESET light would also be extinguished for the train that SI actuated on.
✗ D. Plausible because "SI & FW ISOL" Red lamp on 2RP4 would be LIT solid if both trains of SI did actuate and the SI RESET light would be LIT for the train that SI did not actuated on.
Ref: NOS05RXPROT-15, 218489 | LO: NOS05RXPROT-15, Objectives 19a & b. Identify and describe the Control Room controls, indications, and alarms associated with the Reactor Protection System | Source: New | Cognitive: Fundamental/Memory

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