ELA Inherently Safer Design

Question 1

Define “inherently safer design” (ISD).

Answer 1

a proactive approach to designing processes, systems, and products to eliminate or minimize hazards and risks at their source, rather than relying solely on protective equipment or procedures

Question 2

When should ISD be applied?

Answer 2

throughout the entire lifecycle of a process

Question 3

What two factors affect process risk?

Answer 3

Frequency and Severity

Question 4

Define a hazard.

Answer 4

anything with the potential to cause harm, damage, or adverse health effects to people, property, or the environment

Question 5

What is the purpose of a Hazard Identification and Risk Analysis (HIRA)?

Answer 5

to systematically identify potential hazards and evaluate the risks they pose

Question 6

What are the four different approaches to inherently safer design?

Answer 6

Minimize, Moderate, Substitute, simplify

Question 7

What are the four different strategies for safety in design?

Answer 7

inherent, passive, active, and procedural

Question 8

Identify the design strategy: A temperature sensor in a tank turns on a chiller when a pre-set high temperature is
reached.

Answer 8

Active

Question 9

Identify the design strategy: A containment dike is installed around a storage tank containing flammable material.

Answer 9

Passive

Question 10

Identify the design strategy: A worker must follow a prescribed set of steps before starting an exothermic batch reaction.

Answer 10

Procedural

Question 11

Which inherently safer design strategy is
represented: Less toxic solvent

Answer 11

Substitute

Question 12

Which inherently safer design strategy is
represented: Equipment reduction

Answer 12

Simplify

Question 13

Which inherently safer design strategy is
represented: Smaller volume of
solvent storage

Answer 13

Moderate

Question 14

Write the two reactions responsible for cumene production.

Answer 14

1 benzene + 1 propylene ->1 cumene
1 cumene + 1 propylene -> 1 p-diisopropylbenzene