15.05.2017
The Rostov NPP Information and Public Relations Administration
Rostov NPP: the surveillance specimens are installed at the reactor unit of the starting power unit No 4
The Sezam JSC contractor specialists under the supervision of the Metal Flaw Detection and Technical Control Department (MFD&TCD) personnel of Rostov NPP have assembled the surveillance specimens on the reactor vessel wall of the fourth power unit.
Surveillance specimens are samples made of the same metal as the reactor vessel. Part of them are loaded into the reactor and maintained under the operating conditions. Throughout the lifetime of the reactor unit the specimens are periodically unloaded and examined for control of the structures and metal properties during the operation.
According to Sergey Yurkin, the Head of the MFD&TCD, the control of the condition of the metal at the vessel throughout its lifetime is made with the help of the surveillance specimens. It is one of the conditions of the reactor and reactor unit reliable and safe operation.
“The components of the reactor vessel are exposed to neutrons, which leads to a change in their properties. In this connection, constant monitoring of the condition of the reactor vessel metal is required. And the use of the surveillance specimens is the only way to track changes in the characteristics and mechanical properties of the vessel’s metal and welded joints throughout its life”, Sergey Yurkin noticed.
The safety of a reactor unit is primarily determined by the reliability of barriers that keep nuclear reaction products from spreading in the environment. One of the most important safety barriers is the reactor vessel. The main requirement for the reactor vessel is that it could preserve its integrity under any operating conditions.
The power block No. 4 is planned to be launched in 2017.
The Rostov NPP is an affiliate company for Rosenergoatom Concern OJSC. The plant is based at the Tsymlianskoe reservoir shore 13.5 km away from Volgodonsk. The NPP operates VVER-1000 reactors with the installed capacity of 1000 megawatts. The power block No.1 commenced commercial operations in 2001, with the second and the third power blocks to follow in 2010 and on September 17, 2015, respectively. The power block No. 4 is currently under construction.
The Rostov NPP Information and Public Relations Administration.
Surveillance specimens are samples made of the same metal as the reactor vessel. Part of them are loaded into the reactor and maintained under the operating conditions. Throughout the lifetime of the reactor unit the specimens are periodically unloaded and examined for control of the structures and metal properties during the operation.
According to Sergey Yurkin, the Head of the MFD&TCD, the control of the condition of the metal at the vessel throughout its lifetime is made with the help of the surveillance specimens. It is one of the conditions of the reactor and reactor unit reliable and safe operation.
“The components of the reactor vessel are exposed to neutrons, which leads to a change in their properties. In this connection, constant monitoring of the condition of the reactor vessel metal is required. And the use of the surveillance specimens is the only way to track changes in the characteristics and mechanical properties of the vessel’s metal and welded joints throughout its life”, Sergey Yurkin noticed.
The safety of a reactor unit is primarily determined by the reliability of barriers that keep nuclear reaction products from spreading in the environment. One of the most important safety barriers is the reactor vessel. The main requirement for the reactor vessel is that it could preserve its integrity under any operating conditions.
The power block No. 4 is planned to be launched in 2017.
The Rostov NPP is an affiliate company for Rosenergoatom Concern OJSC. The plant is based at the Tsymlianskoe reservoir shore 13.5 km away from Volgodonsk. The NPP operates VVER-1000 reactors with the installed capacity of 1000 megawatts. The power block No.1 commenced commercial operations in 2001, with the second and the third power blocks to follow in 2010 and on September 17, 2015, respectively. The power block No. 4 is currently under construction.
The Rostov NPP Information and Public Relations Administration.
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