The paper considers the efficiency and possibility of implementing into operational practice VVER-1000 power units campaign extension mode at sliding pressure second circuit. history research Russian nuclear scientists in terms extending VVER reactors is considered. It shown that reducing fresh steam within permissible limits will release additional reactivity due to temperature effect generate...

A nuclear power plant is a complex coupling system, which features multi-physics between reactor physics and thermal-hydraulics in the core, as well multi-circuit primary circuit secondary by shared steam generator (SG). Especially pebble-bed modular HTR plant, different supply modules are further coupled together through main pipes related equipment circuit, since special configuration of mult...

Abstract The HTR-PM600 high-temperature gas-cooled reactor nuclear power plant is based on the technology of pebble-bed module (HTR-PM) demonstration project. It utilizes proven HTR-PM and steam generator modules with a thermal 250 MW th generation approximately 100 e per module. Six in parallel, connected to turbine, form 600-MW plant. In addition, its system configuration island identical tha...

The safe-end of a steam generator (SG) nozzle dissimilar metal weld (DMW) for pressurized water reactors (PWRs) is the weakest point failure which crucial safe operation nuclear power station. Related to materials micro-structures, uniaxial stress–strain relationship basic input parameter plant design, safety evaluation, and life management. In this paper, micro-structure tensile mechanical pro...

Significance: Sep 30, 2002 Identified By: NRC Item Type: FIN Finding UNEXPECTED CHANGES IN UNIT 2 OPERATING PARAMETERS AND DRYER FAILURE DUE TO FLOW INDUCED VIBRATION. The failure to consider the impact of new flow induced vibration failure mechanisms on the Unit 2 steam dryer as part of the extended power uprate analysis resulted in unexpected and unpredictable changes in reactor power, reacto...

At present, the commercial production of hydrogen is essentially carried out by catalytic steam reforming of hydrocarbons: natural gas and naphtha. However, the instability of the prices of natural gas makes the use of other raw materials increasingly attractive. This research focuses on the development of a technology for producing hydrogen from alternative resources, specifically from two typ...

Paper presents algorithm for localization and classification of indications in the field of nondestructive defectoscopy of steam generator tubes of nuclear power plants by multifrequency eddy current method. One of the solutions how to solve this task seems to be using of recurrent neural network (RNN). Pure non-filtered signal from measurement probe was used as an input of RNN. Combination of ...

have sprung to life in these recent years at the welcome sight of a possible nuclear power renaissance, IRIS (International Reactor Innovative and Secure) is the one that has moved most rapidly from an idea to a viable, albeit still at the preliminary design stage, commercial entry. IRIS is a modular pressurized water reactor with an integral configuration (all primary system components—pumps, ...

Nuclear Renewable Oil Shale Systems (NROSS) are a class of large Hybrid Energy Systems in which nuclear reactors provide the primary energy used to produce shale oil from kerogen deposits and also provide flexible, dispatchable electricity to the grid. Kerogen is solid organic matter trapped in sedimentary shale, and the formations of kerogen oil shale in the western United States are the large...