scholarly journals Burnup Credit Evaluation for BWR Spent Fuel from Full Core Calculations

2020 ◽  
Vol 10 (21) ◽  
pp. 7549
Author(s):  
Anna Detkina ◽  
Dzianis Litskevitch ◽  
Aiden Peakman ◽  
Bruno Merk
Keyword(s):  
Strong Influence ◽  
Cost Effective ◽  
Substantial Improvement ◽  
Nuclear Industry ◽  
Spent Fuel ◽  
Fuel Management ◽  
New Approach ◽  
Fuel Assemblies ◽  
Fuel Accumulation ◽  
Full Core

Due to the challenges of spent fuel accumulation, the nuclear industry is exploring more cost-effective solutions for spent fuel management. The burnup-credit method, in application for storage and transport of the spent fuel, gained traction over recent decades since it can remove the over-conservatism of the “fresh-fuel” approach. The presented research is focused on creating an innovative, best estimate approach of the burnup-credit method for boiling water reactor (BWR) spent fuel based on the results of neutronic/thermal-hydraulic coupled full core simulations. The analysis is performed using a Polaris/DYN3D sequence. Four different shuffling procedures were used to estimate the possible range of the BWR fuel discharged burnup variation. The results showed a strong influence of the shuffling procedure on the final burnup distribution. Moreover, a comparison of the 2D lattice and 3D coupled nodal approaches was conducted for the criticality estimation of single fuel assemblies. The analysis revealed substantial improvement in criticality curves obtained with the full-core model. Finally, it was shown that the benefit from the burnup-credit method is larger in the case of more optimal fuel utilisation-based shuffling procedures. The new approach developed here delivers a promising basis for future industrial optimisation procedures and thus cost optimisation.

scholarly journals Some Characteristics of Hypothetic TVSA with Fuel Enriched beyond 5% for VVER1000

2016 ◽  
pp. 22-26
Author(s):  
Ye. Bilodid ◽  
Yu. Kovbasenko
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Nuclear Safety ◽  
Management Systems ◽  
Design Parameters ◽  
Spent Fuel ◽  
Fuel Management ◽  
Severe Accidents ◽  
Fuel Assemblies

The paper presents comparison of regular TVSA with average enrichment of 4,386% and hypothetical TVSA with enrichment of 10% based on design parameters and materials of TVSA fuel assemblies produced by TVEL (Russia), which today are widely used at nuclear power plants in Ukraine. It is shown that implementation of new fuel assemblies will result in improved use of fuel and increase of installed capability factor. At the same time, fresh and spent fuel management systems shall be modernized to meet relevant nuclear safety criteria. The paper analyzes possible criticality initiation at different stages of severe accidents related to core melt and using fuel with higher enrichment.

Characteristics of the Spent Fuel Generated in Korea

2009 ◽  
Author(s):  
Donghak Kook ◽  
Jongwon Choi ◽  
Heuijoo Choi ◽  
Dongkeun Cho
Keyword(s):  
Nuclear Power ◽  
Storage Capacity ◽  
Power Demand ◽  
Spent Fuel ◽  
Fuel Management ◽  
Fuel Characteristics ◽  
Reactor Types ◽  
Fuel Accumulation ◽  
Reactor Pool

Nuclear power has satisfied the national electric power demand for three decades, and there are only two reactor types in Korea. The nuclear fuel species, however, have a large variety of fuel types, dimensions, initial enrichment, and fuel supply vendors. A spent fuel accumulation problem has arisen like any other country that uses nuclear power. The spent fuel wet storage capacity in the reactor pool is getting close to its limit, and so hence, short & long-term solutions are being actively proposed. First the general status for the nuclear industries and spent fuels will be introduced, then spent fuel characteristics will follow, and last the future anticipation of spent fuel management will close this article.

Janus – A New Approach to Air Combat Pilot Training

2019 ◽  
Vol 2019 (4) ◽  
pp. 7-22
Author(s):  
Georges Bridel ◽  
Zdobyslaw Goraj ◽  
Lukasz Kiszkowiak ◽  
Jean-Georges Brévot ◽  
Jean-Pierre Devaux ◽  
...  
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
High Energy ◽  
Training System ◽  
Embedded Sensors ◽  
Pilot Training ◽  
New Approach ◽  
Combat Aircraft ◽  
Air Combat ◽  
The Cost

Abstract Advanced jet training still relies on old concepts and solutions that are no longer efficient when considering the current and forthcoming changes in air combat. The cost of those old solutions to develop and maintain combat pilot skills are important, adding even more constraints to the training limitations. The requirement of having a trainer aircraft able to perform also light combat aircraft operational mission is adding unnecessary complexity and cost without any real operational advantages to air combat mission training. Thanks to emerging technologies, the JANUS project will study the feasibility of a brand-new concept of agile manoeuvrable training aircraft and an integrated training system, able to provide a live, virtual and constructive environment. The JANUS concept is based on a lightweight, low-cost, high energy aircraft associated to a ground based Integrated Training System providing simulated and emulated signals, simulated and real opponents, combined with real-time feedback on pilot’s physiological characteristics: traditionally embedded sensors are replaced with emulated signals, simulated opponents are proposed to the pilot, enabling out of sight engagement. JANUS is also providing new cost effective and more realistic solutions for “Red air aircraft” missions, organised in so-called “Aggressor Squadrons”.

scholarly journals Transforming biorefinery designs with ‘Plug-In Processes of Lignin’ to enable economic waste valorization

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhi-Hua Liu ◽  
Naijia Hao ◽  
Yun-Yan Wang ◽  
Chang Dou ◽  
Furong Lin ◽  
...  
Keyword(s):  
Cellulosic Ethanol ◽  
Cost Effective ◽  
Substantial Improvement ◽  
Selling Price ◽  
Waste Valorization ◽  
Lignin Valorization ◽  
Capital Costs ◽  
Carbon Efficiency ◽  
Synergistic Enhancement ◽  
Total Capital

AbstractBiological lignin valorization has emerged as a major solution for sustainable and cost-effective biorefineries. However, current biorefineries yield lignin with inadequate fractionation for bioconversion, yet substantial changes of these biorefinery designs to focus on lignin could jeopardize carbohydrate efficiency and increase capital costs. We resolve the dilemma by designing ‘plug-in processes of lignin’ with the integration of leading pretreatment technologies. Substantial improvement of lignin bioconversion and synergistic enhancement of carbohydrate processing are achieved by solubilizing lignin via lowering molecular weight and increasing hydrophilic groups, addressing the dilemma of lignin- or carbohydrate-first scenarios. The plug-in processes of lignin could enable minimum polyhydroxyalkanoate selling price at as low as $6.18/kg. The results highlight the potential to achieve commercial production of polyhydroxyalkanoates as a co-product of cellulosic ethanol. Here, we show that the plug-in processes of lignin could transform biorefinery design toward sustainability by promoting carbon efficiency and optimizing the total capital cost.

The holistic risk analysis of spent fuel pool considering the fuel route risk

2021 ◽  
pp. 1748006X2199851
Author(s):  
Zhixin Xu ◽  
Ming Wang ◽  
Binyan Song ◽  
WenYu Hou ◽  
Chao Wang
Keyword(s):  
Nuclear Power ◽  
Comprehensive Evaluation ◽  
Point Of View ◽  
Spent Fuel ◽  
Nuclear Disaster ◽  
Evaluation Approach ◽  
Fuel Assemblies ◽  
Spent Fuel Pool ◽  
Large Water ◽  
Fukushima Nuclear Disaster

The Fukushima nuclear disaster has raised the importance on the reliability and risk research of the spent fuel pool (SFP), including the risk of internal events, fire, external hazards and so on. From a safety point of view, the low decay heat of the spent fuel assemblies and large water inventory in the SFP has made the accident progress goes very slow, but a large number of fuel assemblies are stored inside the spent fuel pool and without containment above the SFP building, it still has an unignored risk to the safety of the nuclear power plant. In this paper, a standardized approach for performing a holistic and comprehensive evaluation approach of the SFP risk based on the probabilistic safety analysis (PSA) method has been developed, including the Level 1 SFP PSA and Level 2 SFP PSA and external hazard PSA. The research scope of SFP PSA covers internal events, internal flooding, internal fires, external hazards and new risk source-fuel route risk is also included. The research will provide the risk insight of Spent Fuel Pool operation, and can help to make recommendation for the prevention and mitigation of SFP accidents which will be applicable for the SFP configuration risk management.

Development of a Thermal Analysis Model for a Nuclear Spent Fuel Storage Cask and Experimental Verification With Prototype Testing

1989 ◽  
Vol 111 (4) ◽  
pp. 647-651 ◽  
Author(s):  
J. Y. Hwang ◽  
L. E. Efferding
Keyword(s):  
Thermal Analysis ◽  
Storage Period ◽  
Department Of Energy ◽  
Pressurized Water Reactor ◽  
Spent Fuel ◽  
Analysis Model ◽  
Pressurized Water ◽  
Fuel Assemblies ◽  
Spent Fuel Storage ◽  
Fuel Storage

A thermal analysis evaluation is presented of a nuclear spent fuel dry storage cask designed by the Westinghouse Nuclear Components Division. The cask is designed to provide passive cooling of 24 Pressurized Water Reactor (PWR) spent fuel assemblies for a storage period of at least 20 years at a nuclear utility site (Independent Spent Fuel Storage Installation). A comparison is presented between analytical predictions and experimental results for a demonstration cask built by Westinghouse and tested under a joint program with the Department of Energy and Virginia Power Company. Demonstration testing with nuclear spent fuel assemblies was performed on a cask configuration designed to store 24 intact spent fuel assemblies or canisters containing fuel consolidated from 48 assemblies.

Geopolitical Factors of U.S. Energy Security System Formation

2013 ◽  
pp. 42-48
Author(s):  
E. Telegina ◽  
M. Tadzhiev
Keyword(s):  
Energy Security ◽  
Alternative Energy ◽  
Cost Effective ◽  
New Approach ◽  
Alternative Energy Sources ◽  
Global Demand ◽  
The World ◽  
The Usa ◽  
Energy Products ◽  
American Economy

According to judgemental forecasts, in the next few years the revolutionary changes in the energy complex both in the USA and in the world in general are hardly possible, considering the enormous inertia of the energetic system and high expenses coming from the infrastructure supersession, even in case of cost-effective alternatives to the existing energy commodities. At the same time, the sharpening of energy security problems resulting from the growth of a global demand on energy products leads to perceprion of necessity for a new approach to forming the global energy market, and to development of new stability and reliability strategies maintenance for assured supplies of energy products. In recent years, the USA as the biggest consumer of energy resources in the world worked out a new national strategy of energy security provision. Its main targets are: meeting the requirements of the American economy of its own resources, lowering the import-dependence level, high use of innovation technologies, significant increase of investments in alternative energy sources, as well as of resource-and energy-saving.

Spent fuel management in India

2009 ◽  
Vol 12 (7-8) ◽  
pp. 955-967
Author(s):  
M.P. Ram Mohan ◽  
Veena Aggarwal
Keyword(s):  
Spent Fuel ◽  
Fuel Management
Sign in / Sign up

Export Citation Format

Share Document