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Just how do you destroy chemical weapons?

WASHINGTON — The proposal on the table for securing Syria's chemical weapons is far from a done deal. But with Syria's government at least suggesting its willingness to become the 190th country to ratify the chemical weapons convention, it's worth taking a look at what steps would come next.

Paul Walker, currently director of Environmental Security and Sustainability at Global Green and a former House Armed Services Committee staffer, has written extensively on the abolition of chemical weapons. He outlined the challenges involved in the process under even the best of circumstances.

After Syria ratified the treaty, Walker said, Syrian President Bashar Assad would have "to declare all of his facilities in writing — not only stockpiles but precursor chemicals — all of his production facilities, and research facilities, and anything else related to chemical weapons."

After that, officials from the Hague-based Organization for the Prohibition of Chemical Weapons would arrive in Syria to take an inventory of the stockpile to see if it matches the declarations. Following these inspections, other countries would compare the numbers to their existing intelligence assessments. (A publicly released French report, for instance, estimates Assad's chemical weapons stockpile at around 1,000 tons.) If discrepancies are found, one of these countries can demand OPCW inspectors be immediately sent in to conduct a "challenge inspection."

Once the inspection process is complete, Syria would have to come up with a technical plan for the destruction of its stockpiles. Until the 1980s, it was common for chemical weapons to be dumped at sea or buried, but this is now strictly prohibited. According to Walker, most countries also don't allow open burning — "just taking the weapons out and blowing them up in the middle of a field" — for understandable reasons.

"You have to treat this as an industrial destruction process in accord with environmental and health regulations," Walker said.

The methods will be determined largely by what Assad has in his stockpile, but assuming he has the weaponized nerve agents that have been discussed in the media, there are two primary ways to destroy them. The first is incineration.

"You have to separate the weapon from the live agent," Walker says. This is generally done by robots. "You have a liquid furnace to burn the agent, and a metal parts furnace to burn the weapon. The complication here is if the weapons have integrated weapons and rocket propellant, you have to break those out, which can be very dangerous, and you have to have separate furnaces for those."

The other option is chemical neutralization: "You drain the weapons and mix that chemically with hot water and a more caustic chemical such as sodium hydroxide. That chemically reacts and destroys the agent pretty well. Typically it also goes through a secondary process to destroy the precursor chemicals, such as a sewage treatment or a liquid incinerator."

Unfortunately, even this doesn't neutralize the danger completely. "There's always some toxic waste that comes out — heavy metals, dried toxic gunk," Walker said. "That has to be stored in barrels and put into a toxic waste site."

Assuming complete cooperation from Assad's government, the destruction of Syria's stockpiles could take "anywhere from a few years to a decade," according to Walker.

What chemical weapons is Assad believed to have?

Intelligence estimates by the United States and its allies suggest that Syria may possess one of the world's largest stockpiles of chemical weapons. According to a French intelligence estimate released on Sept. 3, Syria is believed to possess "several hundred tons of sulfur mustard" as well as "tens of tons of VX" and "several hundred tons of sarin," all powerful chemical agents. All are believed to be in the possession of Unit 450, an elite and secretive air force division that is deeply loyal to the Assad family. The current debate over intervention in Syria began after what the United States says was a sarin attack in the Ghouta region, east of Damascus, on Aug. 21. In briefings with lawmakers, American officials have said that they believe Syria has so far used sarin exclusively in all of its chemical attacks.

New York Times

Just how do you destroy chemical weapons? 09/10/13 [Last modified: Tuesday, September 10, 2013 11:00pm]
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