Hazard, risk and protection layers
Цель: Изучить тему «Hazard, risk and protection layers» и закрепить её практическими заданиями и самопроверкой.
2 акад. часа чтение и разбор теории, решение задач, работа со схемой или виртуальным стендом и проверка понимания.
Основной материал
Концепция нескольких слоев защиты
Hazard - потенциальный источник вреда; risk combines likelihood and consequence. Safety design seeks reduce risk using inherently safer design, prevention, control, alarms, SIS, relief, physical protection and emergency response.
Layer concept
No single sensor should be assumed infallible. Multiple independent protection layers reduce overall risk when truly independent and effective.
Практическая работа
For tank overfill list layers: normal level control, high alarm/operator, independent HH trip, overflow containment. Discuss independence.
Самопроверка
• Difference hazard/risk?
• What is protection layer?
• Why independence matters?
• Is normal control always safety layer?
• What is consequence severity?
Что нужно запомнить
- Концепция нескольких слоев защиты Hazard - потенциальный источник вреда; risk combines likelihood and consequence.
- Safety design seeks reduce risk using inherently safer design, prevention, control, alarms, SIS, relief, physical protection and emergency response.
- Multiple independent protection layers reduce overall risk when truly independent and effective.
- For tank overfill list layers: normal level control, high alarm/operator, independent HH trip, overflow containment.