ELA 974: Hazards and Risk: Introduction to Hazard Identification and Risk Analysis

What HIRA methods could be used during the Process Development phase of the process life cycle?

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Drag the activities on the right to the matching process life cycle phases on the left.

Conception = The first considerations of inherently safer design concepts Process development = Synthesis and processing decisions are made among alternatives Detailed design = construction of the plant depends on this Operation = HIRA revalidation is required at least every five years

TRUE or FALSE: A properly run HIRA will always identify all consequential scenarios.

False

TRUE or FALSE: In the hierarchy of controls, an administrative control is the most reliable at providing protection.

False

TRUE or FALSE: Inherent Hazards are properties of a substance that make it capable of causing harm to people, property or the environment.

False

TRUE or FALSE: Mitigative Safeguards are our first line of defense.

False

TRUE or FALSE: The Checklist Analysis method always requires a team composed of experienced personnel on the process being studied.

False

TRUE or FALSE: The life cycle of a process begins after the plant has been started up and on-spec product is produced.

False

TRUE or FALSE: The written scenario does not even need to be developed all the way through to the incident or loss event.

False

Drag the terms on the right...

Flammability = Minimum Ignition Energy Toxicity = LD50 Chemical reactivity = Decomposition Physical = Potential energy

Drag the terms on the right to the matching terms on the left.

Flow = Parameter Other than = Guide word Part of composition = Deviation Instrument failure = Initiating cause Loss of containment = Loss event Fatality = Impact

Which is the best HIRA methods to use, for a complex process design, during the Design and Construction phase of the process life cycle?

HAZOP

Drag the terms on the right to the matching terms on the left.

Initiating cause = Operator error Loss event = Release of flammable gas Impact = Burn injury Hazard = Flammable gas Deviation = Overpressurization

Match the concepts of inherently safer design (on the left) with the practical means to achieve those concepts (on the right).

Minimize = Inventory reduction Moderate = Closer to zero energy state Substitute = Alternate raw material Simplify = Select a design with fewer pieces of equipment

TRUE or FALSE: A deviation is a change in a process parameter such as temperature, pressure, flow, or level.

True

TRUE or FALSE: A preventive safeguard comes into play once a deviation has occurred to regain control or shut down our process to prevent a loss event.

True

TRUE or FALSE: An example of a secondary containment is a dike wall.

True

TRUE or FALSE: An initiating cause is either a mechanical failure in plant equipment, a human error by anyone who puts their hands on the plant, and environmental condition, or factors that may be outside of the control of plant personnel.

True

TRUE or FALSE: At the Conception phase of the process life cycle, inherent process hazards are identified.

True

TRUE or FALSE: Brainstorming and documentation is much simpler when smaller nodes are chosen.

True

TRUE or FALSE: In scenario development, we do not take into account our preventive safeguards until after we have developed the scenario all the way to the loss event.

True

TRUE or FALSE: Inherently safer designs are one of the most effective ways to prevent incidents because they an significantly reduce potential consequences in many case.

True

TRUE or FALSE: It is much easier to use simplified checklist questions to determine if codes and standards have been followed than to refer back to the codes and standards themselves.

True

TRUE or FALSE: The HAZOP method is commonly augmented with the use of checklists.

True

TRUE or FALSE: The incident sequence begins with something that causes a deviation from design intent and ends with the impact.

True

TRUE or FALSE: We do everything we can to keep the inherent hazards of our process contained and controlled but the hazards are always there.

True

What are the best HIRA methods to use during the Decommissioning phase of the process life cycle?

What-if Analysis Checklist Analysis