METHOD FOR DECONTAMINATING HYDROGEOLOGICAL STRUCTURES Russian patent published in 1997 - IPC

FIELD: physical and engineering decontamination and recovery processes for hydrogeological structures contaminated with radioactive wastes. SUBSTANCE: method involves building of shield made of hydroradionuclide insulating material under contaminated structure, its surface being inclined to center of working area. Boundaries of working area are insulated by vertical hydroradionuclide walls and joined with shield. Tank is made in center of shield below its surface. Workings from soil surface are brought to tank, their walls are reinforced and covered with electricity conducting net and draining material. Holes intended to pass leaching agents to structure are cased by electricity conducting pipes; positive potential is applied to walls of these pipes and negative potential, to walls of workings. Sealing dome is mounted above working area. EFFECT: facilitated procedure. 3 cl, 1 dwg