Within the framework of the implementation of a project aimed at creating an innovative product: the first Russian 1255 MW low-speed NPP turbine intended for the Kursk NPP-2, Power Machines has successfully completed model tests of the blades of the last low-pressure cylinder (LPC) stage. The tests were performed in the presence of the customer's representatives.
Firstly, vibration tests of blades at a scale of 1:2 were carried out by the Power Machines specialists on a vibration tuning unit (Campbell Machine). The vibration characteristics obtained as a result of the tests fully conformed to the calculated data.
The tests of the whole flow channel of the low-speed steam turbine unit low pressure cylinder, carried out earlier also at a scale of 1:2 were done at the steam turbine experimental test bench at the TGK-1 Vyborg cogeneration plant.
The purpose of the bench test was to measure the vibrations of the final stage blades at full steam load. The measured vibration level of the new Power Machines blades in all turbine operation modes was substantially lower than the permissible values.
"This test is a key stage of work over the creation of a new pilot model of a low-speed steam turbine," Power Machines general director Yuri Petrenya commented. "We have demonstrated that our final stage blades - and it is they that are the vital structural elements - have fully confirmed the calculated parameters.
The next stage of the project is the issue of the design documentation, production processes development and preparation for the launch of the production.
In February of this year, Power Machines manufactured the first batch of forgings for full-size 1760 m long blades, in the final stages of the low-pressure cylinder of the low-speed steam turbine pilot model.
Kursk NPP-2 is a power plant which is replacing the power unit of the existing Kursk Nuclear Power Plant, which is being phased out of operation. It is planned to synchronize two first NPP-2 power units with new VVER-TOI type reactors, phasing power units No. 1 and No. 2 of the existing nuclear power plant out of operation. VVER-TOI (a standardized optimized and computerized VVER technology power unit) meets current Russian and international safety requirements, and has a longer service life (60 years) and a greater installed capacity as compared with the existing NPP reactors (1255 MW). The project owner (technical customer) is the ROSENERGOATOM CONCERN JSC, and the general designer and general contractor is the JSC ASE EC.
A contract for the delivery of package equipment of two turbine units for the Kursk NPP-2, which is currently under construction, was signed between PJSC Power Machines and the Consolidated NPP Equipment Procurement Directorate (JSC CEPD), a member of the State Atomic Energy Corporation ROSATOM, in December 2015.
Power Machines will manufacture low-speed steam turbines (with a 1500 rpm rotation speed) and 1255 MW turbo generators for the Kursk NPP-2. These are innovative developments of Power Machines, oriented at nuclear power units with VVER-TOI new generation Russian reactors, which have enhanced reliability and safety. The project is based on the current requirements for new nuclear power plant power units in Russia and abroad.
Relying on the experience of creating powerful high-speed steam turbines and cutting-edge achievements of science, Power Machines designed the project for a 1255 low-speed turbine unit over a period of several years. The company has successively implemented a set of research and development works, experimental testing of new components on the model, full-scale test benches, and preproduction engineering.
Specifically for the production of innovative-type equipment, PJSC Power Machines have built and put into operation a modern high-tech production complex for the manufacture of power equipment, with a capacity of 500 MW and higher, including low-speed turbine units for nuclear power plants with a capacity of over 1200 MW, including possible expansion of the turbine units line to the capacity of 1800 MW.