[en] This book is a blend of basic information on water chemistry at both ambient and high temperature, as well as the problems encountered during wide spread use of water as the fluid for heat transfer in industry. Emphasis is also on steam generating systems and steam quality requirements for high pressure turbines. Special problems of water chemistry and material compatibility in nuclear power stations are also given. A few aspects of both natural waters and effluent treatment systems have also been touched upon briefly

[en] The kinetics of U(IV) and U(VI) electron exchange reaction was studied in sulphuric acid medium at 70⁰C and acidity of 0.15M. The chemical rate of exchange was followed by both α-counting and liquid scintillation counting of the exchanged tracer ²³³U. The effect of 442nm radiation on the rate of exchange was found to be not appreciable. The half-life for the exchange reaction at 343K and ca. 0.1M sulphuric acid was found to be about 11 minutes. (author)

[en] The distribution of Mo(VI) and Tc(VII) as molybdate and pertechnetate between Alamine 336 in benzene and other diluents and aqueous solutions of sulfuric and nitric acids was studied as a function of the concentration of acids and anions. The effect of the nature of the diluents and the presence of Tc on the extraction of Mo was studied

[en] The paper describes the uptake of iodine-131 on Ag-impregnated Amberlite IR-120 resin in the presence of hydrazine, hydrogen peroxide and vanadate. In the presence of a reducing agent, molecular iodine would be converted to I^- and get retained on the resin. Observations made on the reverse process, viz., the conversion of iodide to iodine with the help of oxidising agents at different pH values are also given. (author)

[en] A method for the removal of suspended alumina particles from H₂O/D₂O systems has been developed. It is based on the modification of surface charge of the suspended hydrated alumina particles by the addition of sulfate ions and adsorbing them on conventional strong base anion exchanger. 48 ppM of added sulfate has been found to be the required concentration for treating 30 ppM Al₂O₃ x 3D₂O suspensions. 7 refs., 4 tabs

[en] Salient features of the design of Indian PHWRs and the philosophy behind the primary coolant chemistry are described. Usefulness of carrying out PHT system hot conditioning during its light water commissioning is discussed. The three major aspects of chemical control viz. (a) maintenance of a constant and higher coolant pH, (b) strict control of dissolved oxygen content by hydrogen injection during operation and (c) efficient bleed purification by passing through a filter and a mixed bed are described and their role in achieving satisfactory performance, particularly with reference to minimisation of corrosion and erosion of heat transfer surfaces resulting in fairly low boiler cabinet radiation fields is elaborated. (author). 2 tabs

No abstract available

[en] Metallic inclusions in uranium dioxide fuel contain nearly equal parts of Mo and Ru with smaller amounts of palladium, rhodium and technetium. In severe reactor accidents, it is possible that these inclusions enter the environment as such, unless some intervening chemical processes modify the releases of the constituents. It was seen that in the Chernobyl accident, while nearly pure Ru particles were found far away in Sweden, Mo appears to have been relatively better retained in the damaged fuel. The release rates of these two nuclides in the first six days of the accident are also in opposite directions. This paper examines the consequences of steam-hydrogen ratio on the Mo-Ru phase diagram and attempts to analyze the consequences of the ambient environment on release behavior of Mo in contrast to that of Ru

No abstract available

[en] An investigative programme on water chemistry in thermal power stations located at Badarpur, Chandrapura, Ennore, Korba, Obra, Ukai and Vijaywada was conducted. Comparable data was gathered on raw water characteristics, mixed bed performance, feed and boiler water characteristics, impurities in saturated and superheated steam and condensate at these sites. It was carefully evaluated by a team of experts and a number of recommendations to improve the performance of water and steam chemistry in thermal power stations have been suggested. (author)