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DoT Packaging
As I understand DOT regulations, packagings are designed for "normal conditions during transport" and NOT accident situations.
At 01:03 PM 1/21/00 -0600, you wrote:
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>Jim Hardeman wrote:
>
>> Another incident, to augment the one
>> which Bruce Bugg described earlier.
>> Several years ago (on the day after
>> Thanksgiving, as I recall) there was a fire
>> at a building just outside Atlanta which
>> housed, among other firms, a
>> geotechnical engineering firm which used
>> several moisture-density guages in their
>> work.
>>
>> One of my staff reentered the building with
>> FD personnel, located the devices and
>> determined that the lead shielding had
>> melted on all of them.
>
>I thought density gauge shielding was lead in welded steel shells. If this
>were to be so, when the shields got hot, wouldn't the lead expand and burst
>the shielding? Is that what happened in this case? If not, what was the
>construction of the gauges?
>
>This brings up another question. We have all kinds of requirements for
>packaging for transport of radioactive materials viv-a-vis fires. Do we
>have the same requirements for density gauges where the gauge is the
>packaging for transport. I remember seeing radiography sources in their
>shields sitting in the back of a pickup truck driving down the road. Are
>those devices subject to DOT and NRC packaging requirements? Who knows and
>will tell? Al Tschaeche antatnsu@pacbell.net
>
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************************** /^\ /^\ ***********************************
Tad Blanchard /___\ /___\ NASA-Goddard Space Flight Center
Sr Health Physics Tech O Code 205.9, Greenbelt, MD 20771
Parallax, Inc / \ Phone: 301-286-9157
A Member of the OHI Team /___\ Fax: 301-286-1618
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