Marble Hill Nuclear Station

The Xypex system was applied to the tendon tunnels which are circular tunnels located directly beneath the nuclear containment structures. Application also included the sealing of 244 metres (800 lin. ft.) of cracks and faulty construction joints. In addition, a major Xypex waterproofing and repair program was carried out at the auxiliary building. The lowest level is approximately 30 metres (100 ft.) below grade and is subjected to severe hydrostatic pressures. Because the work at Marble Hill was so extensive, certified Xypex applicators worked at the site steadily for almost two years. It should also be noted that, in order to be accepted for use at this site, the Xypex products had to be tested for radiation resistance in accordance with USA Standard No. N69-1967, Protective Coatings for the Nuclear Industry”.