The Heavy Water Plant at Manuguru, Andhra Pradesh is based on the Bithermal Hydrogen Sulphide-Water (H₂S-H₂0) Exchange Process. This plant with a capacity of 185 Metric Tones per Year is the second in India based on this process. The first one located at Kota, Rajasthan had complete technology developed indigenously with the close interaction between Bhabha Atomic Research Centre and the Heavy Water Board. The Manuguru site was chosen because of its proximity to Singareni coal fields and Godavari river which provide respectively large quantities of coal and water required for the plant. The nearest railway station is 10 Km. from plant site.

Based on the process package developed by D.A.E., the project was executed on a total management basis with Engineers India Ltd. as consultant for the main plant and Tata Projects Ltd. for the captive plant. The captive power plant consist of 3 pulverised coal fired boilers and 3 nos. of extraction condensing turbines each capable of supplying 30 MW power and the required process steam at 32 and 8 atm. pressure.

The main plant consists of two streams, each designed to produce 92.5 MT/Y of nuclear grade heavy water and the processes namely isotopic exchange reaction between H₂S and H₂O followed by vacuum distillation.