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Multiphysics Modeling and Geometry Investigation of Annular Linear Induction Pumps.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Multiphysics Modeling and Geometry Investigation of Annular Linear Induction Pumps./
作者:	Shutayfi, Mohammed Khalid.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	210 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:	Dissertations Abstracts International85-01B.
標題:	Nuclear energy. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30516347
ISBN:	9798379879990

Multiphysics Modeling and Geometry Investigation of Annular Linear Induction Pumps.
Shutayfi, Mohammed Khalid.

Multiphysics Modeling and Geometry Investigation of Annular Linear Induction Pumps. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 210 p.

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2023.

This item must not be sold to any third party vendors.

In order to make nuclear energy more reliable and economically competitive, a new generation of nuclear reactors is being developed. The Liquid Metal-Cooled Fast Reactor (LMCFR) is one of the advanced reactor concepts being considered. LMCFRs provide opportunities for the use of advanced materials that improve reactor safety and availability, passive safety features based on physical laws instead of entirely human intervention, and advanced associated reactor technologies that require fewer auxiliary systems and less maintenance. LMCFRs use electrically-conducting fluids such as liquid metal sodium and lead as reactor coolants due to their excellent heat transfer, thermophysical, and neutronic properties. In LMCFRs, the use of liquid sodium or lead provides a higher safety margin in terms of coolant boiling temperature and allows reactor operation at significantly lower pressure and higher operating temperatures, which improve reactor safety and efficiency of electricity production overall. They also conduct electricity relatively well. This has allowed the addition of a more reliable pump type called the electromagnetic pump (EMP) as part of LMCFR design.Electromagnetic pumps have been used to move electrically-conducting fluids in various applications including nuclear reactors. The harsh environment of strong radiation and high temperature in nuclear reactors requires reliable coolant pumping systems. Circulating reactor coolants using electromagnetic pumps, which have no moving parts such as shafts or impellers, no bearings or seals, nor auxiliary lubrication systems, make them a reliable pumping device. Various EMP designs currently exist. However, the Annular Linear Induction Pump (ALIP) design is the preferred type of EMP for use in LMCFR systems due to its reliability, high performance, and compatibility with existing reactor piping systems. For these reasons, ALIPs are the most investigated and developed EMP. It is no surprise then that current LMCFR designs replace traditional Centrifugal Mechanical Pumps (CMPs) with ALIPs for either primary, secondary, or auxiliary coolant circulation circuits.Even though ALIPs are known for having major advantages over CMPs when used to pump electrically conducting fluids such as liquid metals, they still have lower electrical efficiencies compared to CMPs due to the addition of electromagnetic losses that do not exist in CMPs. For small ALIPs used to purify reactor coolant such as auxiliary sodium purification pumps, low efficiency might not pose a serious economic drawback. However, for reactor-size ALIPs with high performance requirements, the low efficiency means high required electrical input power which results in significant revenue loss over the projected lifetime of ALIPs. Additionally, current LMCFRs that include ALIPs as main pumping sys-tems for primary coolant circulation for pool designs have ALIPs located inside the reactor vessel. This minimizes the possibility of leakage of primary radioactive coolant and reactor loss-of-coolant accidents. However, this design prevents many possible additional advantages such as online reactor pump maintenance and replacement, additional external pump cooling in the case of abnormal reactor operating conditions, visual pump checks, and a reduction of negative effects due to strong radiation and high temperature environments.In this work, multiphysics modeling and geometry investigation efforts of ALIPs have been taken to study possible ways to improve the pump efficiency and pumping system of pool-type LMCFRs that includes ALIPs as main coolant circulation pumps. First, an ALIP multiphysics modeling tool is developed where different physics were added separately before being fully coupled, and the complexity of the model increased.

ISBN: 9798379879990Subjects--Topical Terms:

539127
Nuclear energy.

Multiphysics Modeling and Geometry Investigation of Annular Linear Induction Pumps.
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506 $a This item must not be sold to any third party vendors.
520 $a In order to make nuclear energy more reliable and economically competitive, a new generation of nuclear reactors is being developed. The Liquid Metal-Cooled Fast Reactor (LMCFR) is one of the advanced reactor concepts being considered. LMCFRs provide opportunities for the use of advanced materials that improve reactor safety and availability, passive safety features based on physical laws instead of entirely human intervention, and advanced associated reactor technologies that require fewer auxiliary systems and less maintenance. LMCFRs use electrically-conducting fluids such as liquid metal sodium and lead as reactor coolants due to their excellent heat transfer, thermophysical, and neutronic properties. In LMCFRs, the use of liquid sodium or lead provides a higher safety margin in terms of coolant boiling temperature and allows reactor operation at significantly lower pressure and higher operating temperatures, which improve reactor safety and efficiency of electricity production overall. They also conduct electricity relatively well. This has allowed the addition of a more reliable pump type called the electromagnetic pump (EMP) as part of LMCFR design.Electromagnetic pumps have been used to move electrically-conducting fluids in various applications including nuclear reactors. The harsh environment of strong radiation and high temperature in nuclear reactors requires reliable coolant pumping systems. Circulating reactor coolants using electromagnetic pumps, which have no moving parts such as shafts or impellers, no bearings or seals, nor auxiliary lubrication systems, make them a reliable pumping device. Various EMP designs currently exist. However, the Annular Linear Induction Pump (ALIP) design is the preferred type of EMP for use in LMCFR systems due to its reliability, high performance, and compatibility with existing reactor piping systems. For these reasons, ALIPs are the most investigated and developed EMP. It is no surprise then that current LMCFR designs replace traditional Centrifugal Mechanical Pumps (CMPs) with ALIPs for either primary, secondary, or auxiliary coolant circulation circuits.Even though ALIPs are known for having major advantages over CMPs when used to pump electrically conducting fluids such as liquid metals, they still have lower electrical efficiencies compared to CMPs due to the addition of electromagnetic losses that do not exist in CMPs. For small ALIPs used to purify reactor coolant such as auxiliary sodium purification pumps, low efficiency might not pose a serious economic drawback. However, for reactor-size ALIPs with high performance requirements, the low efficiency means high required electrical input power which results in significant revenue loss over the projected lifetime of ALIPs. Additionally, current LMCFRs that include ALIPs as main pumping sys-tems for primary coolant circulation for pool designs have ALIPs located inside the reactor vessel. This minimizes the possibility of leakage of primary radioactive coolant and reactor loss-of-coolant accidents. However, this design prevents many possible additional advantages such as online reactor pump maintenance and replacement, additional external pump cooling in the case of abnormal reactor operating conditions, visual pump checks, and a reduction of negative effects due to strong radiation and high temperature environments.In this work, multiphysics modeling and geometry investigation efforts of ALIPs have been taken to study possible ways to improve the pump efficiency and pumping system of pool-type LMCFRs that includes ALIPs as main coolant circulation pumps. First, an ALIP multiphysics modeling tool is developed where different physics were added separately before being fully coupled, and the complexity of the model increased.
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