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

Carbon dioxide (CO2)

Answer

Halon 2402

Answer

Dry chemical powder

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

It has a higher ODP than Halon 1301

Answer

It is highly toxic at fire-suppression concentrations

Answer

It corrodes metal surfaces and damages electronics

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

Ability to suppress fires without any electrical conductivity

Answer

Lower cost compared to all other halon alternatives

Answer

Approval for use in occupied spaces without concentration limits

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

They release bromine radicals that disrupt combustion chemistry

Answer

They form a foam layer that physically smothers the fire

Answer

They react chemically with fuel to form non-flammable compounds

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

Immediately decommission and vent the system to atmosphere

Answer

Convert the system to Halon 1211 which has a lower ODP

Answer

Replace all halon with CO2 regardless of application or safety considerations

Question 6

Which organization coordinates the international halon banking network to ensure recovered halon reaches critical users who still need it?

Accepted Answer

The Halon Alternatives Research Corporation (HARC) working with UNEP

Answer

The World Meteorological Organization (WMO)

Answer

The International Civil Aviation Organization (ICAO) alone

Answer

The US Department of Defense acting unilaterally

Question 7

A technician discovers that a Halon 1301 cylinder has discharged due to a false activation. Under EPA regulations, what is the correct course of action?

Accepted Answer

Recover the discharged halon if possible and recharge using halon from a certified bank

Answer

Leave the area evacuated and allow remaining halon to dissipate naturally

Answer

Recharge the cylinder with a virgin halon from a domestic supplier

Answer

Replace the system immediately with a non-halon alternative agent