02.11.2016
Leningrad NPP Information and Public Relations Administration
The Leningrad NPP: the 1st power block’s turbine condensers will be inspected for consistency
The Leningrad NPP has started the trials of the four turbine condensers of the 1st power block under construction: the contracting company’s team has finalized the first stage by filling those in with water up to the +2,00 meters. All in all, to fill in the condensers up to the +15,00 meters point, one needs around 10 000 cubic meters of water.
“This activity enables us to give a preliminary assessment of the assembled condensers and the pipelines connecting them to the equipment. There are no leakages of the welded joints and no abruptions. We can go on working on raising the water level”, Andrey Graf, the deputy head of the turbine hall at the Leningrad NPP under construction, commented.
The consistency verification by impletion is a time-consuming procedure. The welded joints of the turbine’s condensing unit are around 1.5 thousand meters long. The specialists have to carefully check the joints to make sure each of them is consistent.
Anatoly Gnevashev, the head of the turbine room at the Leningrad NPP under construction, said: “The goal of the inspection is to identify potential leakages in the condenser and the pipelines and to eradicate them, thus making sure the turbine vacuum system’s consistency. The inconsistencies are, first of all, airings and osculum penetrating into the system with cooling water. These factors change the chemistry of the feed water and affect the construction materials by causing corrosion and deposits. If we exclude osculum into the turbine’s vacuum system, we will facilitate reliable, safe, and efficient operation of the NPP’s equipment”.
Once the condensers are fully tested, the turbine’s vacuum system will additionally undergo a steam pressurization check: additional pressure will be executed over the water surface to find inconsistencies. This procedure is designed to reconfirm the quality standards of the assembly works at the turbine’s condensers. At the next stage, the team will start working on a trial vacuum buildup.
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.
“This activity enables us to give a preliminary assessment of the assembled condensers and the pipelines connecting them to the equipment. There are no leakages of the welded joints and no abruptions. We can go on working on raising the water level”, Andrey Graf, the deputy head of the turbine hall at the Leningrad NPP under construction, commented.
The consistency verification by impletion is a time-consuming procedure. The welded joints of the turbine’s condensing unit are around 1.5 thousand meters long. The specialists have to carefully check the joints to make sure each of them is consistent.
Anatoly Gnevashev, the head of the turbine room at the Leningrad NPP under construction, said: “The goal of the inspection is to identify potential leakages in the condenser and the pipelines and to eradicate them, thus making sure the turbine vacuum system’s consistency. The inconsistencies are, first of all, airings and osculum penetrating into the system with cooling water. These factors change the chemistry of the feed water and affect the construction materials by causing corrosion and deposits. If we exclude osculum into the turbine’s vacuum system, we will facilitate reliable, safe, and efficient operation of the NPP’s equipment”.
Once the condensers are fully tested, the turbine’s vacuum system will additionally undergo a steam pressurization check: additional pressure will be executed over the water surface to find inconsistencies. This procedure is designed to reconfirm the quality standards of the assembly works at the turbine’s condensers. At the next stage, the team will start working on a trial vacuum buildup.
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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