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procedures > S2.OP-SO.CVC-0012 — Letdown HX Temperature Control

S2.OP-SO.CVC-0012 — Letdown HX Temperature Control

⚠️ DRAFT

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