Saturday, November 1, 2008 - Vol. VII Issue 11

Technically Speaking
Comparisons of Dense Gas Dispersion Models with Field Experiments
By Dr. John Nordin

There are only a few experiments sponsored by government and private industry where hazardous chemicals are purposely released and the downwind concentrations of the resulting chemical cloud measured. The releases have been done at a safe location such as the HazMat Spill Center near Mercury, Nevada, which is operated by the U.S. Department of Energy. Because of the expense in conducting large-scale tests, only a limited number have been done, and even fewer test results are in the public domain. Various researchers have compared the results with models predicting chemical cloud dispersion.

This article examines large releases of anhydrous ammonia and anhydrous hydrofluoric acid at the HazMat Spill Center under controlled conditions and compares concentrations measured downwind with those predicted using ALOHA, the SLAB model, and the PEAC tool.(FULL STORY)

View this Month's Photos
More Humor from the desk of our own Barb Coulthard
More great humor to get you through the month. (FULL STORY)

More Rocky Mountain Fall Colors
Photos from the Colorado and Wyoming Rockies (FULL STORY)

Tourism in the West
The Bone Wars(FULL STORY)

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