Which process safety analysis is commonly used to assess reactivity hazards in a facility?

• A. Only HAZOP
• B. Process safety analyses such as HAZOP or LOPA
• C. Environmental risk assessment
• D. Financial risk modeling

Answer: (B)

The main idea is that process safety analyses are the tools designed to identify and control reactivity hazards inside a chemical facility. HAZOP (Hazard and Operability Study) is a structured, systematic thinking process that explores how deviations from design intent could cause hazardous conditions, including runaway reactions or excessive heat release due to reactivity issues. It helps you surface potential scenarios, their causes, and consequences, so you can address them in design and operating procedures. LOPA (Layer of Protection Analysis) builds on that by assessing whether the existing safeguards—sensors, interlocks, alarms, blind spots in procedures—are sufficient to keep risk at an acceptable level, using initiating events and protection layers to quantify risk reduction. Because reactivity hazards involve how chemical reactions and heat release behave under process conditions, using these process safety analyses is exactly how facilities systematically identify, evaluate, and reduce those risks. Environmental risk assessments and financial risk modeling focus on different domains—environmental impacts outside the plant and economic risks, respectively—so they don’t target the internal reactivity hazards the question is about.