SALEM
SALEM STUDY SYSTEM
procedures > S2.OP-SO.WG-0009 — Discharge of 22 Gas Decay Tank to Plant Vent

S2.OP-SO.WG-0009 — Discharge of 22 Gas Decay Tank to Plant Vent

⚠️ DRAFT

S2.OP-SO.WG-0009 — Discharge of 22 Gas Decay Tank to Plant Vent

Purpose

Provides the procedure for releasing the contents of 22 Waste Gas Decay Tank to the plant vent in a controlled manner, including valve alignment, 2WG41 latch-and-set sequence, release monitoring, and termination.

Key Actions / Information

  • Step 5.2.11: Preparations at Panel 104-2 — verify 22 GDT not in service and not selected for Standby, record initial pressure (PIS2037), perform 2WG41 latch-and-set sequence
  • Step 5.2.11.D: Latch-and-set 2WG41 (GDT Vent Control Valve) — set Flow Bias to <0%, position selector switch to OPEN and release to AUTO, set Flow Bias to >=100%, verify lost CLOSED indication, reduce Flow Bias to <0%, verify CLOSED indication, position selector switch to CLOSE
  • Step 5.2.11.F/G: Open 22WG31 (GDT Inlet Valve) and slowly open 22WG34 (GDT Stop to Plant Vent)
  • Step 5.2.12: Commence release — position 2WG41 selector to OPEN/AUTO, slowly set Flow Bias to <=100%
  • Step 5.2.13: Monitor during release — calculate average release rate every 10 minutes, record MET data, check for termination conditions (pressure downstream of 2WG38 >8.0 psig or 2WG41 closure)
  • Terminate when 22 GDT pressure reaches 10 psig: reduce Flow Bias to <0%, close 2WG41-SWT, close 22WG34
JPM — 2019 IP-k
22 GDT release per S2.OP-SO.WG-0009: same latch-and-set sequence as S2.OP-SO.WG-0008 (21 GDT). Key differences: discharge valves are 22WG31 and 22WG34, pressure instrument is PIS2037 (vs PIS1036 for 21 GDT). Release terminates at 10 psig tank pressure. 2WG38 downstream pressure >8.0 psig also requires termination. Monitoring during release includes calculating average release rate every 10 minutes and recording MET data.

Connections