A dump system, quenching system and reaction-interfering agent are all examples of:

• A. Secondary containment
• B. Primary containment
• C. Mitigative safeguards
• D. Emergency process abort system

Answer: (D)

The main idea here is safeguards that actively interrupt a hazardous reaction to prevent a runaway event. A dump system, a quenching system, and a reaction-interfering agent are all actions used to terminate or suppress the ongoing reaction rather than merely containing or mitigating its consequences after something goes wrong.

A dump system moves reactive material out of the reactor to a safe sink, removing reactants from the ongoing process. A quenching system cools or dilutes the mixture and introduces a quenching agent to stop the reaction’s heat and chemical drive. A reaction-interfering agent chemically disrupts the reaction pathway or slows catalytic activity, effectively halting the reaction progression. All of these are designed to abort the process itself in an abnormal situation, which is the purpose of an emergency process abort system.

They’re not primarily about keeping material inside equipment (primary containment) or about containing a release after it starts (secondary containment), nor are they primarily about reducing consequences after a release (mitigative safeguards). Their role is to stop the reaction quickly to prevent escalation.