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Penhall Company Precision Stops Radiological Waste

The Project:

As part of a major decontamination and decommissioning project for the San Onofre Nuclear Generating Station, the power plant selected Penhall Company for the demolition of several of the facility's structures including the remaining section of the sphere enclosure building. Specifically, Penhall Company was tasked with finishing off a partially demolished section of wall measuring 95 feet high, 3 feet thick and 150 feet in diameter.

The Challenge:

Following a radiology survey and release, it was determined that the west portion of the wall bordered a contaminated area of the site while a clean path resided to the east. In order to prevent cross-contamination, Penhall Company had to make sure the most of the wall material fell to the east.

The Result:

Leveraging its specialized expertise in concrete sawing and breaking for complex projects such as this, Penhall Company demolished the remaining section of wall in a six-hour period. Due to Penhall Company's precision, over 95 percent of the debris fell on the clean east side, saving nearly 3 million pounds of material from becoming radiological waste.



Reprinted with permission from the March/April 2009 issue of Radwaste Solutions
(c) 2009 by American Nuclear Society.

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