The impact of radiation on concrete structures in nuclear power plants (NPPs) is causing frequent repairs, requiring rehabilitation of structures. The University of Tokyo published a paper on the impact of irradiation on concrete structures, by which the crystalline quartz, in aged concrete, is converted into amorphous state.

This is the negative aspect, affecting the soundness and durability of concrete. However, N. Bhanumathidas and N. Kalidas, founder directors of the Visakhapatnam-based Institute for Solid Waste Research & Ecological Balance (INSWAREB), during the course of their review on the subject, found certain ‘positive features of irradiation on quartz crystals’ which convert the non-reactive crystalline quartz to reactive amorphous silica. They interacted with the Scientists of University of Tokyo, and prepared a review report for the benefit of students, researchers and faculty.

“This opens up enormous opportunities for the cement-concrete industry,” say Dr. Bhanumathidas and Mr. Kalidas, who are involved in research on fly ash bricks and had developed fly ash, lime and gypsum (FAL-G) bricks as an alternative to clay bricks to reduce the threat of massive generation of fly ash by Thermal Power Plants (TPPs).