Rosatom Completes the Supply of Engineered Safety Features Actuation Systems for Kudankulam NPP Units 3 and 4
Mumbai : Rosatom Automated Control Systems JSC (RASU JSC, the Instrumentation & Control and Electrical Engineering Division of Rosatom) completed the supply of equipment for engineered safety features actuation system computerized subsystems (ESFAS CS) for Units 3 and 4 of Kudankulam NPP in Tamil Nadu state, India. The role of the general designer and supplier of equipment in this project belongs to Atomstroyexport JSC (ASE JSC, the Engineering Division of Rosatom State Corporation). In total, about 300 items of equipment were manufactured and delivered to the plant – four sets of ESFAS CS, in accordance with the number of Safety I&C trains, per each power unit featuring VVER-1000 reactors. To avoid simultaneous failure, they are physically separated, i.e. located in different rooms, and have autonomous power supply from separate diesel generators.
Specialists developing the ESFAS CS for Units 3 and 4 relied on the operating experience of the same system at Kudankulam NPP Units 1 and 2, which allowed them to implement a number of optimized solutions. One of such solutions is the application of non-programmable modules that process signals from sensors without the use of microprocessors. This helps to reduce the dependence of safety functions on application software and increases the resistance of equipment to potential common cause failures.
The final delivery of ESFAS CS equipment was yet another step of equipping the power units with Russian automation, control and safety systems, implemented through industrial cooperation coordinated by ASE JSC, with the participation of Atomenergoproekt JSC (part of the Engineering Division of Rosatom), Atomtechenergo JSC (part of the Electric Power Division of Rosatom), RASU JSC, and equipment manufacturers. Installation on the site will be followed by the pre-commissioning stage, which includes the off-line and integrated tests of the systems. Following the tests, the systems will be prepared for commissioning and further operation at Units 3 and 4 of Kudankulam NPP.
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