Staffan Qvist

Staffan Qvist
Self-employed

PhD

About

45
Publications
13,066
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
593
Citations
Additional affiliations
April 2014 - present
University of California, Berkeley
Position
  • Visiting researcher
August 2013 - present
Uppsala University
Position
  • PostDoc Position
May 2011 - February 2012
Los Alamos National Laboratory
Position
  • Researcher

Publications

Publications (45)
Article
Full-text available
There is an ongoing debate about the deployment rates and composition of alternative ener- gy plans that could feasibly displace fossil fuels globally by mid-century, as required to avoid the more extreme impacts of climate change. Here we demonstrate the potential for a large-scale expansion of global nuclear power to replace fossil-fuel electrici...
Article
Full-text available
The Swedish reactor fleet has a remaining potential production of up to 2100 TWh. Forced shut down would result in up to 2.1 Gt of additional CO 2 emissions 50,000–60,000 energy-related-deaths could be prevented by continued operation. A nuclear phase-out would mean a retrograde step for climate, health and economy. Keywords: climate change nuclear...
Article
In this study, the parameter space where a magnetite (Fe3O4) film forms on the surfaces of steels exposed to non-isothermal oxygen-controlled Pb and LBE coolant loops while avoiding PbO contamination has been quantified by a consistent set of 6 equations. These equations provide both the allowable temper- ature range of operation as well as the ran...
Article
The Autonomous Reactivity Control (ARC) system is a new safety device that can passively provide negative reactivity feedback in fast reactors that is sufficient to compensate for the positive coolant density reactivity feedback even in large low-leakage cores. The ARC system is actuated by the inherent physical property of thermal expansion, and h...
Article
The Assembly Design and OPTimization code (ADOPT) is a comprehensive computer code written to automate the process of designing and analyzing fast reactor fuel assemblies and cores. It finds a fuel assembly design that maximizes the fuel volume fraction in the core while adhering to set constraints for all component temperatures, pressure drop, coo...
Article
Full-text available
In the first months of 2022, there was a sharp turn in the energy policy of the European Union, initially spurred by increasing energy prices and further escalated by Russia’s invasion of the Ukraine. Further transformation of the energy system will likely be accompanied by the gradual abandonment of natural gas from Russia and an increase of renew...
Article
Full-text available
This article discusses a sustainable low-carbon development strategy that uses nuclear heat sources to replace coal boilers at existing coal power plants in China, to help support a resource and cost-effective low-carbon development. Based on the local situation in China, a three-stage strategy to explore the potential of repowering coal power by n...
Article
Full-text available
The near and mid-term future of the existing Polish coal-fired power fleet is uncertain. The longer-term operation of unabated coal power is incompatible with climate policy and is economically challenging because of the increasing price of CO2 emission allowances in the EU. The results of the techno-economic analysis presented in this paper indica...
Article
Full-text available
Out of 2 TWe of coal power plant capacity in operation globally today, more than half is less than 14 years old. Climate policy related to limiting CO2-emissions makes the longer-term operation of these plants untenable. In this study, we assess the spectrum of available options for the future of both equipment and jobs in the coal power sector by...
Chapter
To enable a high utilization of uranium while using a once-through fuel cycle without reprocessing, a special class of nuclear reactors collectively known as “breed-and-burn” (B&B) reactors have been under consideration since the late 1950s. The unique feature of a B&B reactor is that it can breed fissile material and then fission (burn) a signific...
Article
In this paper, the conceptual design of a small lead-cooled nuclear reactor intended to replace diesel-power in off-grid applications is presented. In a vessel of dimensions making it transportable by air, the targeted design performance is to produce 3 MW of electrical power for up to 30 years without reloading of fuel. Consequently, the inner ves...
Article
Nuclear power is facing an uncertain future in Sweden due to political directives that are seeking to phase out this energy source over coming decades. Here we examine the environmental and economic costs of hypothetical future renewable-energy-focused cases compared with the current nuclear and hydroelectricity-centred mix in Sweden. We show that...
Article
In this paper the dynamic thermal hydraulic fast reactor simulation code CHD is presented. The code is built around a scriptable object-oriented framework in the programming language Python to be able to flexibly describe different reactor geometries including thermal-hydraulics models of an arbitrary number of coolant channels as well as pumps, he...
Conference Paper
Full-text available
SEALER (Swedish Advanced Lead Reactor) is a 3-10 MWe lead-cooled fast reactor operating on 19.9.% enriched UO 2 fuel. It is designed for commercial production of electricity in communities and mining operations in the Canadian Arctic. The reactor is capable of passive decay heat removal by radiation through the primary vessel and will make use of n...
Article
Full-text available
A number of analyses, meta-analyses, and assessments, including those performed by the Intergovernmental Panel on Climate Change, the National Oceanic and Atmospheric Administration, the National Renewable Energy Laboratory, and the International Energy Agency, have concluded that deployment of a diverse portfolio of clean energy technologies makes...
Article
We agree with Johnstone et al. 's call to give “balanced consideration to a full range of alternative low-carbon energy options” to address climate change. Unlike Johnstone et al. , we believe that a balanced portfolio includes the investment of modest fractions of current energy research,
Article
The Autonomous Reactivity Control (ARC) system was developed to ensure inherent safety of Generation-IV reactors while having a minimal impact on reactor performance and economic viability. In this study we present the transient response of fast reactor cores to postulated accident scenarios with and without ARC systems installed. Using a combinati...
Article
A potentially promising coolant/structural material pair for a liquid-metal-cooled fast reactors is lead bismuth eutectic (LBE) coolant with the ferritic/martensitic steel HT9. The challenge of deploying LBE, however, is the corrosive environment it creates for structural materials. This corrosion can be mitigated with precise oxygen content contro...
Conference Paper
Full-text available
This paper describes the continuing effort to employ the 3-dimensional (3D) in-core fuel management strategy in Breed-and-Burn (B&B) reactors to reduce the axial variation of the discharge burnup and, thereby, reduce the peak burnup and corresponding minimum required peak radiation damage. A more robust design of the segmented fuel assembly has bee...
Article
Full-text available
Breed-and-burn (B&B) reactors are a special class of fast reactors that are designed to utilize low grade fuel such as depleted uranium without fuel reprocessing. One of the most challenging practical design feasibility issues faced by B&B reactors is the high level of radiation damage their fuel cladding has to withstand in order to sustain the B&...
Article
For a reactor to establish a sustainable breed-and-burn (B&B) mode of operation, its fuel has to reach a minimum level of average burnup. The value of the minimum required average discharge burnup strongly depends on the core design details. Using the extended neutron balance method, it is possible to quantify the impact of major core design choice...
Conference Paper
Full-text available
This paper assesses the feasibility of improving the performance of a large breed-and-burn (B&B) reactor by using the 3-dimensional (3-D) in-core fuel management strategy. A preliminary conceptual design of a core made of segmented fuel assemblies is outlined. Each fuel assembly is made of 4 subassemblies that are axially stacked in a way that enab...
Article
In this study, the characteristics of changes in reactivity due to increasing burnup of uranium-fueled fast reactors are analyzed. A new classification system for nuclear reactor cores based on their uncontrolled tendency for reactivity changes during burnup was introduced and the design-optimization strategy for any fast reactor core aimed at a mi...
Article
A preliminary parametric dynamic response study of the Autonomous Reactivity Control (ARC) system is performed for a large fast reactor core subjected to the following postulated design-extension accident scenarios: unprotected overpower (UTOP), unprotected loss of flow (ULOF) and unprotected loss of heat sink (ULOHS). The results show that the ARC...
Article
The duct wall and inter-assembly gap make up 5–15% of the volume of a typical fast reactor core and these components have a profound impact on the system neutron economy. In this paper, a methodology for the design of optimum hexagonal fuel assembly geometries was developed. For each nuclear reactor core made up of ducted assemblies there exists a...
Article
Full-text available
This study is focused on defining and optimizing the design parameters of inherently safe "battery" type sodium-cooled metallic-fueled nuclear reactor cores that operate on a single stationary fuel loading at full power for 30 years. A total of 29 core designs were developed with varying power and flow conditions, including detailed thermal-hydraul...
Article
We report the design and assembly of a corrosion station to enable simultaneous proton irradiation of a metallic surface that was also in contact with molten lead–bismuth eutectic (LBE). The capability has been established at the ion beam materials laboratory at Los Alamos National Laboratory (LANL). The engineering design focused on temperature an...
Article
Reactors that aim to sustain the breed & burn (B&B) mode of operation at minimum discharge burnup require excellent neutron economy, Minimum-burnup B&B cores are generally large and feature low neutron leakage probability and a hard neutron spectrum. While highly promising fuel cycles can be achieved with such designs, the very same features are pu...

Network

Cited By

Projects

Projects (2)
Archived project
Introducing three dimensional fuel management to breed-and-burn type of sodium-cooled fast reactor (SFR) designs.