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Tech ID: 382
Project Overview
This project addresses two nuclear borehole logging techniques
that are capable of identifying and mapping numerous contaminants
and are nuclide-specific. Passive spectral gamma-ray (SGR) logging
positively identifies gamma-emitting contaminants and is quite sensitive,
but requires further development to be made quantitative. Neutron-induced
spectral gamma-ray (multispectral) logging adds a pulsed neutron
source to an SGR instrument, recording gamma-ray energy spectra
during and/or after irradiation of the borehole environment with
energetic neutrons. Multispectral logging can positively identify
many nuclides including chlorine and a number of RCRA metals. In
the multispectral part of this project, a contaminant-doped concrete
test facility was designed and constructed at Grand Junction, CO.
Working with an industry partner (Environmental Measurements Corp.,
Denham, TX), DOE assembled a hybrid test instrument composed of
the pulsed-neutron source section of the existing commercial instrument
along with a laboratory-grade cryogenic detector and multichannel
analyzer. |
