# DEMO DOCUMENT — NOT A CONTROLLED DOCUMENT — DO NOT USE ON PLANT

Document number: WRPS-DEMO-002
Title: Alarm Rationalisation Record — Wet Well Level Signal
Revision: 0
Effective: 2026-01-01

## 1. Scope

A fabricated alarm rationalisation record for the wet well WW-101 level signal
at the Waterloo Road Pump Station, written to give the Reference branch of the
plant assistant something to retrieve and cite during a no-LLM demonstration.

## 2. LEVEL_SIGNAL_FAULT

**Meaning.** The level signal fault alarm indicates that the PLC has rejected
the wet well level measurement from LIT-101. In this fabricated record the
rejection is described as occurring when the signal is out of range, frozen for
longer than the configured period, or of bad quality.

**Consequence.** With no trusted level measurement the station cannot modulate
pump duty on level. This fabricated record states that control falls back to
the LSHH-102 high high level switch as the only remaining level protection.

**Priority.** Priority 1 in this fabricated record. The stated reasoning is
that losing the level measurement on a wet well that can spill removes the
station's ability to see a spill developing.

**Operator response.** Not stated here. The response belongs in a procedure,
and this is a rationalisation record.

## 3. HIGH_LEVEL

**Meaning.** A fabricated entry stating that the wet well level has reached the
high level alarm setpoint and that the station has not yet drawn the level down.

**Priority.** Priority 2 in this fabricated record.