Hazardous or toxic waste destruction or containment – Destruction or containment of radioactive waste
Patent
1992-06-17
1995-05-09
Walsh, Donald P.
Hazardous or toxic waste destruction or containment
Destruction or containment of radioactive waste
422 50, 422 62, 422 681, 422186, 588900, 378 53, 378 88, 209576, 209577, 209578, 209579, 209589, G21F 900, B07C 534
Patent
active
054141958
ABSTRACT:
The concentrations of residual heavy metal contaminants in the particulate material in a slurry produced in a particulate material washing process are monitored on-line and can be used to control the washing process. In alternative embodiments of the invention, x-rays, thermal neutrons or laser beams are directed at the slurry as it flows through a flow cell to induce emission of secondary x-rays, gamma rays or light, respectively, characteristic of the heavy metal contaminants and constituents representative of the solids contents of the slurry. These characteristic energies are measured and used to determine the concentration in ppm of the residual heavy metal contaminants in the particulate material within the slurry.
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Bartko John
Congedo Thomas V.
Grant David C.
Lahoda Edward J.
Partlow William D.
Jenkins Daniel
Walsh Donald P.
Westinghouse Electric Corporation
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