S1.OP-SO.CAV-0001 — Control Room Ventilation Operation
Purpose
Provides direction for normal and emergency operation of the Control Area Ventilation (CAV) system, including manual initiation of Accident Pressurized mode.
Key Actions / Information
Exam — 2023 Q62
Manual Initiation of ACCIDENT PRESSURIZED Mode (Section 5.7): Pressing ACCIDENT PRESSURIZED pushbutton at 1RP2 actuates BOTH units' CAV into AP Mode and opens the emergency intake dampers on the unaffected unit. If AP mode was initiated from Unit 2, Step 5.7.1 should NOT be performed and the NORMAL lamp will remain illuminated. AP mode must be initiated from the unit where the radiation source is detected. Actuating from the wrong unit will not properly align the emergency intake dampers.
Connections
- Related systems: RPS/SSPS
- Related procedures: AB.RAD-0001 — Radiation Monitor Abnormality
- Related exam questions: 2023 Q62
- Related exam: 2023 NRC Written Exam