Q37 — OT Delta-T Inputs
012000K5.01 (3.3)
Which ONE of the following lists the correct operational plant parameters used as input to the OTΔT reactor protection setpoint calculation?
A. Tavg, Reactor Power, and ΔT only.
B. Tavg and ΔT only.
C. Tavg, Pressurizer Pressure, and ΔI only.
D. Tavg and Pressurizer Pressure only.
▶ Show Answer & Explanation
✓ C. Correct. OTΔT is a DNB protection trip and uses Tavg, Pressure, and delta flux as input values.
✗ A. Plausible because the candidate may believe that reactor power is an input to the OTΔT setpoint calculation to establish a rated or nominal ΔT value to be used in the calculation.
✗ B. Plausible because the candidate may confuse the inputs for OPΔT with those for OTΔT. Candidate may believe that over-temperature only includes temperature inputs.
✗ D. Plausible because the candidate may confuse some of the inputs for OPΔT with those for OTΔT. Delta flux is set to zero for OPΔT, not OTΔT.
Ref: Safety Limits Section of Technical Specifications | LO: NOS05RCTEMP-08, ELO 6.a | Source: Bank — Indian Point Vision Database | Cognitive: Fundamental
Connections
- Related systems: RPS/SSPS
- Related tech specs: TS 2.0 — Safety Limits and LSSS
- Related exam: 2020 NRC Written Exam