In-Situ Decommissioning
The concept of In-Situ Decommissioning (ISD) is not new. In practice it is the
permanent entombment of a facility where it stands and may involve various accepted
engineering and regulatory approaches. In some cases a building may be collapsed,
its remaining spaces filled with grout, and then capped with an earthen or concrete
cover. In others, the building may be completely covered to create a large mound.
In any ISD technology, radioactive contaminants and chemical residuals are entombed
to mitigate release and migration consistent with the regulatory requirements and
demonstrated by risk-based performance analysis. The potential for accessing and
spreading contaminants is essentially eliminated, ensuring long-term effectiveness.
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