Results 51 to 60 of about 705,564 (243)

Global Fossil Methane Emissions Constrained by Multi‐Isotopic Atmospheric Methane Histories

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 5, 16 March 2025.
Abstract The global CH4 budget of sources and sinks is highly uncertain, particularly the emissions from specific sources such as fossil fuels (FF) or agriculture. Here, we estimate plausible global CH4 source and sink scenarios using historical observations and simulations of atmospheric CH4 mole fraction and its stable isotopic (δ13C‐CH4, δD‐CH4) and
Ryo Fujita, Heather Graven, Giulia Zazzeri, Benjamin Hmiel, Vasilii V. Petrenko, Andrew M. Smith, Sylvia E. Michel, Shinji Morimoto   +7 more
wiley   +1 more source

Multicriterion Synthesis of Intelligent Control Systems of Generating Unit of Nuclear Power Station [PDF]

, 2014
The paper is devoted to solution of some problems in nuclear power station generating unit intellectual control systems using genetic algorithms on the basis of control system model development, optimizations methods of their direct quality indices and ...
Jafari Henjani, Seyed Mojtaba, Severin, Valeriy Petrovich   +1 more
core   +1 more source

Evaluation of neutronic performance for the VVER-1000 reactor core with regenerated uranium-plutonium fuel

Nuclear Energy and Technology, 2023
The possibility has been considered for the VVER-1000 reactor fuel loading to be formed based on regenerated fuel with the use of the spent fuel accumulated in reactors of the same type.
V. V. Semishin
semanticscholar   +1 more source

Development and Verification of a Spatial Dynamics Code RESTA‐3D for Light Water Reactors

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
A neutronics/thermal‐hydraulics (TH) coupled spatial dynamics code, reactor system transient analysis‐three dimensional (RESTA‐3D), has been developed for both static and transient analysis of large advanced light water reactors (LWRs), with a focus on control rod (CR) ejection accidents.
Yong Cui, Jing Shang, Longwei Mei, Jianfei Tong, Yashwant Sawle   +4 more
wiley   +1 more source

ANALYSIS OF INSULATION SYSTEMS OF ELECTRIC MOTORS OF MAIN CIRCULATION PUMPS VVER-1000 WITH THE PURPOSE OF ITS MODERNIZATION AND IMPROVEMENT

Municipal economy of cities
The article is devoted to the study of the influence of the geometric parameters of the conductor and insulation on the durability of the insulation systems of electrical machines.
А. Hordiienko
semanticscholar   +1 more source

Steam Generators of PWR [PDF]

, 2015
Tato bakalářská práce se zabývá popisem jednotlivých konstrukčních řešení parogenerátorů. V první části bakalářské práce je popsán počátek jaderného průmyslu v Rusku. Samostatná práce se věnuje jednotlivým konstrukčním řešením. Poslední kapitola detailně
Michalica, Martin
core  

Assessing the Performance of Point and Two‐Point Kinetics Models in Simulating the Control Rod Drop Accident in VVER‐1000 Reactors

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
Reactivity‐initiated accidents (RIAs), such as the control rod drop accident (CRDA), are classified as design‐basis accidents (DBAs) in the final safety analysis report (FSAR) of a nuclear power plant (NPP), and investigating these events is crucial.
Seyed Mohammad Hossein Mousakazemi, Rajashik Paul   +1 more
wiley   +1 more source

Experimental and Numerical Investigation of Temperature Distribution on Reactor Pressure Vessel Support under Operating Conditions

Science and Technology of Nuclear Installations, Volume 2019, Issue 1, 2019., 2019
Reactor pressure vessel (RPV) support is a key safety facility which is categorized as Class 1 in the ASME nuclear safety design. The temperature distribution of RPV support is one of the key considerations for the concrete safety contacting with the bottom of the support.
Longkun He, Ying Lv, Pengfei Liu, Eugenijus Ušpuras   +3 more
wiley   +1 more source

Assessment of the TiO2/water nanofluid effects on heat transfer characteristics in VVER-1000 nuclear reactor using CFD modeling

Nuclear Engineering and Technology, 2015
The most important advantage of nanoparticles is the increased thermal conductivity coefficient and convection heat transfer coefficient so that, as a result of using a 1.5% volume concentration of nanoparticles, the thermal conductivity coefficient ...
Seyed Mohammad Mousavizadeh, Gholam Reza Ansarifar, Mansour Talebi   +2 more
doaj   +1 more source

Uncertainty Assessment in the Prediction of Selected Fission Products in the Case of a Postulated Severe Accident Scenario at VVER-1000

IOP Conference Series: Earth and Environment, 2023
The aim of the paper is to present the results and insights gained from the analysis of the postulated severe accident scenario for the Nuclear Power Plant (NPP) equipped with a VVER-1000, focusing on the uncertainty assessment in the prediction of ...
P. Groudev, P. Petrova, P. Vryashkova
semanticscholar   +1 more source