13.10.2016
Leningrad NPP Information and Public Relations Administration
The reheat and separation hydraulic control line of the Leningrad NPP’s 1st power block under construction has been 80% installed
Two reheat and separation hydraulic control lines of the Leningrad NPP’s 1st power block under construction have been installed. Two other control lines are being installed in accordance with the schedule. Four threads of pipelines are 80% completed.
According to Artiom Shepitko, the chief engineer of the turbine hall at the Leningrad NPP under construction, the pipelines are designed to transmit overheated steam from superheating separators to low-pressure cylinders. The pipelines made of carbon steel are 1200 and 1800 mm in diameter. A bridging electric crane, wrenches, and monorails are used to installed it. All in all, the contracting company has to install 32 blocks of lines, complete 56 welding joints, including those on the technological equipment of the machinery hall. The total length of welded seams is around 250 meters.
The welding joints of the pipelines installed are being constantly controlled, too. The quality of each joint completed has to be confirmed as the outcome of non-destructive tests, such as visual, measuring, and radiographic ones.
Anatoliy Gnevashev, the head of the Leningrad NPP turbine hall, said: “When the cross-over pipelines are installed, we will test them for endurance and leak integrity. The pipelines will experience trial excessive pressure of 1.10 MPa for 10 minutes with the water temperature being at least +5 C. This trial us supposed to evidence that the installation was done properly. Afterwards, the cross-over pipelines will be adjusted with the low-pressure cylinders. At the final stage, they will undergo comprehensive engineering certification, get registered at Rostechnadzor, and will be pre-commissioned in due course as a part of the separation and reheat system”.
The Leningrad NPP is an affiliate company for Rosenergoatom Concern OJSC. The plant is based in the city of Sosnovy Bor, 40 km to the west from Saint Petersburg at the Gulf of Finland shore. The Leningrad NPP is the first Russian nuclear power plant having RBMK-1000 reactors (uranium-graphite channel-type thermal neutron reactors). The NPP exploits 4 power blocks with the electric capacity of 1000 megawatt each. Also, pursuant to the NPP-2006 project, 1,2 VVER-1200 power blocks included into The State Atomic Energy Corporation ROSATOM long-term plan are being constructed. Rosenergoatom Concern OJSC is the owner and developer of the project. Holding TITAN-2 is the primary contractor. ATOMPROEKT is the general designer.
Leningrad NPP Information and Public Relations Administration.
According to Artiom Shepitko, the chief engineer of the turbine hall at the Leningrad NPP under construction, the pipelines are designed to transmit overheated steam from superheating separators to low-pressure cylinders. The pipelines made of carbon steel are 1200 and 1800 mm in diameter. A bridging electric crane, wrenches, and monorails are used to installed it. All in all, the contracting company has to install 32 blocks of lines, complete 56 welding joints, including those on the technological equipment of the machinery hall. The total length of welded seams is around 250 meters.
The welding joints of the pipelines installed are being constantly controlled, too. The quality of each joint completed has to be confirmed as the outcome of non-destructive tests, such as visual, measuring, and radiographic ones.
Anatoliy Gnevashev, the head of the Leningrad NPP turbine hall, said: “When the cross-over pipelines are installed, we will test them for endurance and leak integrity. The pipelines will experience trial excessive pressure of 1.10 MPa for 10 minutes with the water temperature being at least +5 C. This trial us supposed to evidence that the installation was done properly. Afterwards, the cross-over pipelines will be adjusted with the low-pressure cylinders. At the final stage, they will undergo comprehensive engineering certification, get registered at Rostechnadzor, and will be pre-commissioned in due course as a part of the separation and reheat system”.
The Leningrad NPP is an affiliate company for Rosenergoatom Concern OJSC. The plant is based in the city of Sosnovy Bor, 40 km to the west from Saint Petersburg at the Gulf of Finland shore. The Leningrad NPP is the first Russian nuclear power plant having RBMK-1000 reactors (uranium-graphite channel-type thermal neutron reactors). The NPP exploits 4 power blocks with the electric capacity of 1000 megawatt each. Also, pursuant to the NPP-2006 project, 1,2 VVER-1200 power blocks included into The State Atomic Energy Corporation ROSATOM long-term plan are being constructed. Rosenergoatom Concern OJSC is the owner and developer of the project. Holding TITAN-2 is the primary contractor. ATOMPROEKT is the general designer.
Leningrad NPP Information and Public Relations Administration.
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