S2.OP-SO.CVC-0012 — Letdown HX Temperature Control
Purpose
Provides direction for controlling letdown heat exchanger outlet temperature, including automatic divert valve operation and temperature limits to protect demineralizer resins.
Key Actions / Information
Exam — 2022 Q29
Auto-divert at 136 degrees F (2CV21 diverts to VCT). Letdown HX outlet temperature limit of 140 degrees F to prevent resin damage.
Connections
- Related systems: CVCS
- Related exam questions: 2022 Q29
- Related exam: 2022 NRC Written Exam