SALEM
SALEM STUDY SYSTEM
procedures > S2.OP-SO.CH-0001 — Chilled Water System Operation

S2.OP-SO.CH-0001 — Chilled Water System Operation

⚠️ DRAFT

S2.OP-SO.CH-0001 — Chilled Water System Operation

DRAFT — Reconstructed from exam materials

Purpose

System operating procedure for the Chilled Water System on Salem Unit 2. Covers normal operation, shutdown, and isolation of non-essential heat loads when chiller capacity is lost.

Key Actions / Information

Section 4.6 — Isolation of Non-Essential Heat Loads:

Used when chiller units are inoperable and T/S 3.7.10 action requires isolating non-essential loads to maintain cooling for essential components.

Attachment 2 — Non-Essential Heat Load Determination:

Step-by-step determination of heat loads to isolate:

  • Step 1.A: Record CW inlet water temperature from SC.OP-DL.ZZ-0008(Q) log. Use highest temperature and add 1.5°F for instrument uncertainty.
  • Step 1.B: Record number of inoperable chillers.
  • Step 1.C: Using Table A, determine Total Heat Load Isolation value based on inlet water temperature, number of inoperable chillers, and operating mode (Maintenance Mode / EACS status).
  • Steps 1.D-1.F: Select components from Table B for isolation. Record heat load values. Mark N/A for components to remain available.
  • Step 1.G: Sum isolation column values for Total Isolation value.
  • Step 1.H: Verify Total Isolation (Table B) exceeds Total Heat Load Isolation (Step 1.C).
JPM — 2018 SRO-A1
Identical scenario to 2022 SRO-A1. Both chillers tripped, inlet water temp 85.1°F (83.6°F + 1.5°F uncertainty), EACS out of service, Maintenance Mode: Table A yields 902.8 kBTU/HR required isolation. SM directs ECAC NOT isolated. Selected loads (21/22/23 PACU, Secondary Lab, Primary Lab, Counting Room, PASS) total 906.6 kBTU/HR — just exceeds the 902.8 kBTU/HR requirement. T/S 3.7.10 action 'b' entered at 1600 for both chillers inoperable.
JPM — 2022 SRO-A1
With both chillers inoperable, inlet water temp 85.1°F (83.6°F + 1.5°F uncertainty), EACS out of service, and Maintenance Mode: Table A yields 902.8 kBTU/HR required isolation. ECAC kept available per SM direction. Selected loads (21/22/23 PACU, Secondary Lab, Primary Lab, Counting Room, PASS) total 906.6 kBTU/HR — just exceeds the 902.8 kBTU/HR requirement.

Connections