Posted by: Green Knight | November 1, 2012

Kentucky tanker fire

Here’s something I just read, followed by my remarks:

LOUISVILLE, Ky. (AP) — A chemical fire was burning early Thursday after an explosion at the site of a train derailment in northern Kentucky that forced the evacuation of hundreds of people, including an entire small town.

Metro Safe spokeswoman Jodie Duncan said hundreds remained evacuated, including those from the town of West Point and people from nearby Louisville.

The evacuation order came after a cutting torch ignited vapors Wednesday while workers tried to separate two rail cars from an earlier derailment. The vapors were from a colorless, flammable gas called butadiene.

Three workers were taken to the University of Louisville hospital with severe burns. Authorities have not released the names of the injured workers but said one was in very critical condition, another in critical condition and the third in serious condition.

“The workers that are here are highly trained and this is one of those freak accidents that occurs unfortunately,” Lt. Col. Rick Harrison, assistant chief with the suburban Buechel Fire Department said.

Authorities were letting the fire burn itself out, but Duncan said they don’t yet know how long that will take.

Firefighters on Thursday continued spraying water onto the butadiene car and adjacent cars carrying hydrogen fluoride in order to cool them. Officials had been concerned that the fire could spread, but Duncan said the hydrogen fluoride cars were now cool to the touch.

The Paducah & Louisville Railway train derailed Monday morning near Dixie Highway. Nine of the 13 derailed cars were carrying hazardous chemicals.

Residents within a 1.2 mile radius of the wreck were evacuated Wednesday after the gas caught fire, sending up flames and thick, black smoke. Those living within a 5-mile radius were ordered to stay indoors. Also, three local schools within the areas of the evacuation or shelter-in-place orders were closed Thursday.

I, for one, would not be finding out if the HF tank was “cool to the touch”…not in a million years. Hydrogen fluoride is NASTY.  In tank fires, you stay away from the ends of the tanks and flood with large quantities of water until well after the fire is out, because even an overheated tank of water can cause a BLEVE (boiling-liquid expanding-vapor explosion). And using cutting torches near a tank of butadiene is just asking for it. Using a saw while spraying spark-suppresant foam is the way to go. I feel sorry for the guys who got burned, but this was no “freak accident.”

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