Two phase flow, boiling, burn-out (in clusters), post dry out heat transfer, transient two phase flow and heat transfer, multi- fluid models, fluid modelling techniques, flow instability, hydrodynamic simulation of reactor circuits and components such as headers and plenums, heat transfer and fluid flow in rodclusters, liquid metal heat transfer, flow induced vibration in clusters, heat exchanger tubes etc., reflux condensation in tubes, pipes, condensation of steam in large pools, dynamics of steam generator, cyclone separators, vapour condensation in presence of non-condensing gases, thermal deaeration in condensers, performance of reflux condensers. Nuclear waste handling and disposal - Heat transfer and fluid flow problems, treatment of radioactive wastes. Studies on process equipment - e.g. solvent extraction and ion-exchange columns, chemical reactor kinetics, new separation processes, mathematical modelling.

Design and development of reactor components and equipment for heavy water moderated and cooled thermal reactors and sodium cooled fast reactors such as steam generators, separators, heat exchangers (Na to water), pumps, special valves (for Na or Heavy Water Service) quick opening valves, mechanical seals specially for reactor environment, lubricants and bearings (for high temperature service with Heavy Water, Na). Development of mathematical models and experimental techniques for stress analysis. Design and development of high speed centrifuge, high speed bearings, design of special nozzles, design of tall vessels including interaction with wind loads. Development of computer codes for non-linear structural analysis, study of fluid structure interaction and graphics.

Studies on materials for reactor service (cladding, pressure tubes, vessel, etc.); measurement of material properties (creep, low cycle fatigue, critical crack length, rupture analysis), accelerated creep (at higher stress) and its interpretation for actual conditions, radiation effects on materials, wear and friction in different combination of materials for Heavy Water and Na service.

Metal-water reaction, fracture mechanics studies, component failure, probabilistic risk analysis, generation of reliability data for reactor system components, material properties under accident conditions, two phase critical flow through pipes and nozzles, forward and reverse two-phase flow through pumps, single and two-phase thermosyphon cooling, propagation of pressure waves in two-phase mixtures, earthquake (seismic) analysis, propagation of failures, causes and effects of vibrations, transport of hydrogen in enclosed volumes.

Causes and effects in reactor materials and materials used in reprocessing plants, accelerated corrosion studies and their interpretation for actual conditions, water and steam chemistry conditions for high temperature system, corrosion resistant materials.

Materials properties: general mechanical and structural properties and special nuclear and chemical properties; design for dead and live loads, pressure, temperature and seismic conditions; special consideration for radiation hazards, shielding, leak tightness etc.; construction - materials of construction, and methods conventional, slip forming and prepakt, etc.

Reactor kinetics and control studies, use of micro-processor computers to control reactors.

For handling radioactive materials, reactor fuels, remote operation of components, e.g. valves. Remote viewing tools and measuring equipment for diameter, length, low, thickness etc. Application of robots for maintenance and inspection work in high radiation areas. Equipment for viewing operations under liquid sodium.

Rolled   joints,  welds,  control-rod  drives;  explosion  joining,  joining  of dissimilar metals etc.

Residual stress evaluation by NDT method: Development of suitable gadgets (UT, X-ray etc.); acoustic emission studies for weld integrity evaluation, noise measurement and analysis techniques for diagnostics, in-service surveillance techniques and equipment.