ArmInfo. The implementation of Armenian NPP 2nd unit lifetime extension in respect to the terms and volume of work could be compared with the construction of a new unit.
This was stated to Arminfo reporter by Areg Galstyan, the advisor to the Minister of Energy Infrastructures and Natural Resources of Armenia According to him, the complexity of the program implemented in Armenia is limited in terms. "But, in any case, we want to meet the terms," the minister's advisor said, adding that the whole project is conditionally divided into 2 stages.
At the first, preparatory stage, a tremendous work was carried out to survey and study the main equipment. In total, about 4500 pieces of equipment were examined. It was important to determine where exactly the station was located, what needs to be changed, what can not be changed, draw a line under those equipment and structures that directly affect the level of safety, both design and operational. "Until the last day, while the station will be operated, we will implement all necessary measures to improve the safety level of the second power unit.
According to the results of the research, the necessary calculations were made on the state of the metal, pumps, other rimary equipment of the primary circuit. We have 2 main circuits - the first, which includes a nuclear island, and the second - a turbine island. All security systems are mainly concentrated in the first, nuclear island. Although, of course, there are a lot of other systems, on which security depends, and which are in the 2nd circuit," Areg Galstyan said, adding that all work is carried out in close cooperation with Russian specialists. all efforts are focused on the implementation of the second stage, At this stage, work is to be carried out to replace equipment directly related to safety, in particular, to replace the turbine plant, which will increase the efficiency of the station by increasing the thermal power STI unit using the previous volumes of fuel. This will give the opportunity to produce more energy, and reduce unit costs. Thus, it will be possible to reduce the load on the tariff margins station. To this end, the NPP will be stopped in April 2018 for a period of six months. This is done so that the station's share in the total balance of generated electricity would be insignificant, since in the flood period the main burden will fall on hydropower facilities. Construction and installation works will be conducted in spring and summer. In summer, the replacement of one turbine, then the second one. In six months, one turbine generator will be replaced, and the second - in 2019.
The first turbine generator is already at the station. Replacing just two turbine generators will lead to a load on the tariff regime. The advisor to the minister noted that on the first circuit - there is an unchangeable equipment that will be repaired. Most of the pumping equipment, valves, valves, latches, automation, primary converters, so-called sensors, information monitoring systems and reactor protection control systems will be replaced. In his turn, the chief engineer of the ANPP Arthur Grigoryan stressed that the installation of the main equipment is a specific work, which should involve those organizations that have a lot of experience in this business. "There is a very complex specificity here, and therefore the number of organizations that are able to do so is sharply reduced." The final choice will be made by our general contractor, the Russian company of Rusatom Service, which works in accordance with the intergovernmental agreement. according to the schedule. This gives us the opportunity to be ready to receive the main equipment, "said Artur Grigoryan. The chief engineer also noted that "Rusatom Service" has extensive experience in the field of modernization of the units. "The company coordinates foreign projects, including the Kozloduy NPP in Bulgaria, where a similar unit operates, work is being done with Hungary, China, Iran and other countries." At the Armenian NPP, Rusatom Service not only implements the program, but also attracts subcontractors, including those from Armenia. "They do so in accordance with the regulations adopted by the State Corporation of Rosatom. So our partner is one of the most advanced and efficient companies in the world, as evidenced by the portfolio of orders, "said the chief engineer of the ANPP. Recall that on December 10 last year, Rusatom Service JSC completed the delivery of the first of two turbine generators for the Armenian NPP. Transportation of equipment from the manufacturer in St. Petersburg took place in two stages - by sea to the port of Poti (Georgia) and from there - by land transport to the site of the Armenian NPP. The new unit will be installed in place of the former, which was manufactured in the late 70s of the last century. Together with the turbine generator, auxiliary systems will be replaced - this is one of the features of working on the project. The turbine generator was manufactured by PJSC "Power Machines" - an energy machine building company of Russia, one of the ten world leaders in terms of installed equipment. Under the contract signed in December 2016, Power Machines PJSC must manufacture and supply two complete turbo-generators with a rated capacity of 236 MW with the excitation and process control systems for the upgraded power unit of the Armenian Nuclear Power Plant. At the same time, the scope of work includes installation and adjustment of equipment. The second turbo- generator is planned to be delivered to the station in December 2018.
Rusatom Service JSC is part of the electric power division of Rosatom State Corporation. The company provides foreign nuclear power plants the full range of services and supplies needed to ensure operation and repair throughout the life cycle. The company is present in almost all countries with operating NPPs with WWER outside of Russia. In the markets of China, Iran, Bulgaria and Armenia, Rusatom Service takes leading positions, being the general contractor for the extension of the service life, the implementation of preventive maintenance and upgrading of the equipment of NPPs. In foreign markets, Rusatom Service JSC has generated a portfolio of orders worth about 2 billion US dollars.