Results 21 to 30 of about 10,176 (222)

Possible in-service damages of steam generators at VVER-1000 and VVER-1200 NPP units and their impact on long-term operation [PDF]

E3S Web of Conferences, 2020
Specific features of corrosion-mechanical damages of primary circuit header to steam generator vessel branch welds at VVER-1000 NPPs and their impact on safety and economic efficiency during long-term operation are analysed. Measures to avoid the damages
Arzhaev Alexander, Arzhaev Alexey, Makhanev Valentin, Antonov Mikhail, Emelianov Anton, Kalyutik Aleksander, Karyakin Yury, Kurakin Maksim, Lyashenko Daniil, Arzhaev Kirill, Denisov Ilya   +10 more
doaj   +1 more source

Radiocarbon Measurements Reveal Underestimated Fossil CH4 and CO2 Emissions in London

Geophysical Research Letters, Volume 50, Issue 15, 16 August 2023., 2023
Abstract Radiocarbon (14C) is a powerful tracer of fossil emissions because fossil fuels are entirely depleted in 14C, but observations of 14CO2 and especially 14CH4 in urban regions are sparse. We present the first observations of 14C in both methane (CH4) and carbon dioxide (CO2) in an urban area (London) using a recently developed sampling system ...
Giulia Zazzeri, Heather Graven, Xiaomei Xu, Eric Saboya, Liam Blyth, Alistair J. Manning, Hannah Chawner, Dien Wu, Samuel Hammer   +8 more
wiley   +1 more source

Numerical Evaluation of Coolability Limits of External Reactor Vessel Cooling Using an Improved Thermal‐Hydraulic System Analysis Code

International Journal of Energy Research, Volume 2023, Issue 1, 2023., 2023
The external reactor vessel cooling provides a means to stabilize the molten core inside the reactor vessel during the severe accident in nuclear power plants. For a credible evaluation of the chances of success of in‐vessel melt retention, one requires high‐fidelity predictions on the natural circulation flow around the reactor vessel and, in ...
Yeon-Gun Lee, Il Woong Park, Geng Chen
wiley   +1 more source

Prospects of creation of the two-component nuclear energy system [PDF]

Nuclear Energy and Technology, 2019
Possible options of organization of two-component energy system with closed nuclear fuel cycle (CNFC) and new business potential associated with provision of CFC services to foreign customers are examined.
Andrey Yu. Petrov, Alexander V. Shutikov, Nikolay N. Ponomarev-Stepnoy, Valery S. Bezzubtsev, Mikhail V. Bakanov, Vladimir M. Troyanov   +5 more
doaj   +3 more sources

Experience of using loose parts monitoring systems at Novovoronezh NPP [PDF]

Nuclear Energy and Technology, 2022
In VVER reactor plants, it is impossible to completely exclude the appearance of loose, loosely fixed and foreign objects in the main circulation circuit.
Alexey V. Voronov, Mikhail T. Slepov
doaj   +3 more sources

Analysis of Soil-Structure Interaction Effects of NPP Structures on Nonhomogeneous Subsoil [PDF]

, 2019
This paper describes the soil-structure interaction (SSI) effects to the Nuclear Power Plant (NPP) structure with reactor VVER-1200. The simplified 1D and numerical 3D FE models of the nonhomogeneous subsoil are investigated.
Králik, Juraj, Králik, Juraj jr.
core   +1 more source

Advancing Small Modular Reactor Technology Assessment in the Czech Republic, Egypt, and Poland

Science and Technology of Nuclear Installations, Volume 2023, Issue 1, 2023., 2023
This paper introduces the utilization of the International Atomic Energy Agency’s toolkit for reactor technology assessment (RTA) application to deploy small modular reactors (SMRs) in the Czech Republic, Egypt, and Poland. The increasing demand for clean energy has led to the prominence of small modular reactors (SMRs) in addressing global energy ...
Waad Saleh, Dalibor Kojecky, Edyta Agata Macieja, Juyoul Kim, Leon Cizelj   +4 more
wiley   +1 more source

Experimental Research for CHF Sensitivity of Heat Flux Distribution under IVR Conditions

Science and Technology of Nuclear Installations, Volume 2022, Issue 1, 2022., 2022
In‐vessel retention (IVR) through external reactor vessel cooling (ERVC) is one of the most effective severe accident mitigation measures in the nuclear power plants. The most influential issues on the IVR strategy are in‐vessel core melt evolution, the heat fluxes imposed on the lower head, and the external cooling of reactor pressurized vessel (RPV).
Shilei Han, Pengfei Liu, Bo Kuang, Yanhua Yang, Arkady Serikov   +4 more
wiley   +1 more source

Ecological foresight in the nuclear power of XXI century [PDF]

, 2016
The access to reliable sources of energy is the key to sustainable development of mankind. The major part of the energy consumed by people is generated with a chemical reaction of fossil fuel burning.
Nosov, Y., Shcheklein, S., Smyshlaeva, O., Tashlykov, O.   +3 more
core   +1 more source

Computational benchmark for fuel assembly of VVER-1000 using the Monte Carlo Serpent code [PDF]

Nuclear Technology and Radiation Protection, 2018
The use of a new Monte Carlo Serpent code for the calculation of water-cooled reactors is presented and a calculation scheme of the fuel assembly for VVER-1000 reactors developed.
Galchenko Vitaliy V., Shlapak Ihor, Gulik Volodymyr   +2 more
doaj   +1 more source