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NRC Issues Draft Regulatory Guide Related to Laboratory Investigations of Soils and Rocks

The NRC issued for public comment draft regulatory guide (DG), DG–1256, ‘‘Laboratory Investigations of Soils and Rocks for Engineering Analysis and Design of Nuclear Power Plants,” which would be Revision 3 of Regulatory Guide 1.138.  This DG describes laboratory investigations and testing practices acceptable to the NRC staff for determining soil and rock properties and characteristics needed for engineering analysis and design of foundations and earthworks for nuclear power plants.  The DG was revised to reflect changes in standards for testing procedures developed since 2003, and at the same time, the guide was re-formatted.

To access the Federal Register notice, click here.

To access DG-1256, click here.