Global Nuclear Safety
National Research Nuclear University "MEPhI"
online version: ISSN 2499-9733
print version: ISSN 2305-414Х
2016-1(18)
Operation of nuclear industry facilities
| Article Name | Operation Extension Features of Overload Machines of PWR-1000 Reactors Power Units |
|---|---|
| Authors | A.A. Lapkis, V.N. Nikiforov, O.Yu. Pugacheva |
| Address | Volgodonsk Engineering Technical Institute the branch of National Research Nuclear University «MEPhI», |
| Abstract | The considerable amount of works on machine operation extension of overload and transport technology equipment of fuel overload is made for Balakovo NPP in 2014-2015. Due to the revising STD (scientific and technical documentation) from the moment of power unit input in operation, the deep analysis of STD, designer and operational documents is carried out. Absence of the approved techniques of operation extension for this type of the equipment is revealed. The document analysis showed that machines are constructed with the considerable inventory of seismic stability and satisfy with STD. The research task of detection of the main faulting factors and residual resource assessment with their account for machine mechanical part of overload and transport technology equipment of fuel overload is set. Programs of survey on each machine are made individually and agreed with developers and operators of overload machines (and the set of СOM (current operating maintenance) differing on power units). Search of faulting factors is carried out using methods of visual and non-destructive testing. Survey revealed absence of degradation of metal that allowed to discard the majority of factors as not limiting the overload machines and СOM resource. For an assessment of a residual resource main ones as cyclic loading is selected. A bridge metalwork are selected to be nonrestorable elements for an assessment of a resource . The analysis of cyclic durability allowed to justify period of extension of operation, equal originally to assigned – 30 years. Need for development of the leading document regulating extension of operation period of mechanical part of overload machines and transport technology equipment for overload of PWR-1000 fuel is formulated following the results of operation. |
| Keywords | nuclear power, NPP, reactor, PWR, fuel overload, SPM (scheduled preventive maintenance), nuclear fuel, overload machine, transport technology equipment, load-lifting mechanisms, diagnostics, survey, resource extension |
| Language | Russian |
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| Papers | 95 - 103 |
| URL Article | URL Article |
| Open Article |