ODP Halons and Fire Suppression Systems 3

Question 1

Which of the following is the most widely deployed halon 1301 alternative in total-flooding fire suppression systems?

Accepted Answer

HFC-227ea (FM-200)

Answer

HFC-227ea, marketed as FM-200, became the most widely adopted replacement for Halon 1301 in total-flooding systems due to its similar low-concentration effectiveness and low toxicity.

Question 2

What is a significant environmental drawback of HFC-227ea (FM-200) as a halon replacement?

Accepted Answer

It is a potent greenhouse gas with a very high Global Warming Potential (GWP)

Answer

While FM-200 has zero ODP, it has a GWP of approximately 3,220, making it a significant contributor to climate change despite solving the ozone depletion problem.

Question 3

Novec 1230 (FK-5-1-12) is promoted as an environmentally preferred halon substitute primarily because of its:

Accepted Answer

Zero ODP and very low GWP of approximately 1

Answer

Novec 1230 has zero ODP and an extremely low GWP of about 1, making it among the most environmentally benign total-flooding agents currently available.

Question 4

Inert gas fire suppression systems (e.g., IG-541/Inergen) work by a fundamentally different mechanism than halons. How do they suppress fires?

Accepted Answer

They reduce oxygen concentration to a level that will not support combustion but is still breathable

Answer

Inert gas systems reduce oxygen from ~21% to approximately 12–14%, below the level needed to sustain combustion but above the roughly 10% threshold unsafe for brief human exposure.

Question 5

What is the recommended best practice for an organization that currently operates a Halon 1301 fixed suppression system?

Accepted Answer

Continue using the system and recover/recycle the halon upon servicing

Answer

Organizations should keep existing halon systems operational but must recover and recycle the agent during servicing rather than venting it, preserving the halon bank while avoiding new releases.

ODP - Ozone Layer Depletion Practice Test

ODP - Ozone Layer Depletion Practice Test

ODP Halons and Fire Suppression Systems 3