The Modular High Temperature Gas-cooled Reactor (MHTGR) Containment Trade Study PDF Download
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Author: Publisher: ISBN: Category : Gas cooled reactors Languages : en Pages : 0
Book Description
The modular high temperature gas-cooled reactor (MHTGR) is an advanced reactor concept under development in a cooperative program involving U.S. government, the nuclear industry, and the utilities. The design utilized the basic hig-temperature gas-cooled reactor features of ceramic fuel, helium coolant, and a graphite moderator. The key design parameters, including power, power density, and core and configuration of the MHTGR are selected to utilize the inherent properties of these materials to develop passive safety features that provide a significantly higher margin of safety than current generation reactors. In this paper the reference MHTGR module is combined with several alternatives, each characterized by an alternative containment building structure providing differing degrees of radionuclide containment. The reference design and each alternate are described and their performance compared. The MHTGR radionuclide source and how it related to the radionuclide retention provided by buildings and building features are discussed. This is followed by more detailed considerations leading to the selection of five alternatives. The underlying assumptions and approach employed in assessing alternative designs are summarized. The evaluation of the cost and offsite does reduction benefit of the reference design and selected alternatives are described. Finally, the various alternatives are compared with each other allowing conclusions to be drawn. All design concepts meet the U.S. Environmental Protection Agency's Protective Action Guidelines at the site boundary hence precluding the need for emergency drills, sheltering, or evacuation of the public.
Author: Publisher: ISBN: Category : Gas cooled reactors Languages : en Pages : 0
Book Description
The modular high temperature gas-cooled reactor (MHTGR) is an advanced reactor concept under development in a cooperative program involving U.S. government, the nuclear industry, and the utilities. The design utilized the basic hig-temperature gas-cooled reactor features of ceramic fuel, helium coolant, and a graphite moderator. The key design parameters, including power, power density, and core and configuration of the MHTGR are selected to utilize the inherent properties of these materials to develop passive safety features that provide a significantly higher margin of safety than current generation reactors. In this paper the reference MHTGR module is combined with several alternatives, each characterized by an alternative containment building structure providing differing degrees of radionuclide containment. The reference design and each alternate are described and their performance compared. The MHTGR radionuclide source and how it related to the radionuclide retention provided by buildings and building features are discussed. This is followed by more detailed considerations leading to the selection of five alternatives. The underlying assumptions and approach employed in assessing alternative designs are summarized. The evaluation of the cost and offsite does reduction benefit of the reference design and selected alternatives are described. Finally, the various alternatives are compared with each other allowing conclusions to be drawn. All design concepts meet the U.S. Environmental Protection Agency's Protective Action Guidelines at the site boundary hence precluding the need for emergency drills, sheltering, or evacuation of the public.
Author: Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
This paper presents the response of the 450 MW(t) MHTGR with a steam turbine power conversion system to expected and hypothetical accident source term assumptions. A range of vented low pressure containment (VLPC) strategies was considered that would enhance the retention of radionuclides. This study was prepared to review the technical merits of VLPC options in response to an NRC request during preapplication review of the steam cycle MMGR. The study found that, even under arbitrary hypothetical assumptions regarding significantly lower than expected fuel performance, vented low pressure containment options can effectively reduce accident doses. The reference design with a VLPC meets the 10CFR100 and prompt fatality doses even with lower than expected fuel performance. Alternative VLPC designs were studied which could be used to augment the current design to provide additional margin.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The MHTGR is an advanced reactor concept being developed in the USA under a cooperative program involving the US Government, the nuclear industry and the utilities. The design utilizes basic HTGR features of ceramic fuel, helium coolant and a graphite moderator. However the specific size and configuration are selected to utilize the inherently safe characteristics associated with these standard features coupled with passive safety systems to provide a significantly higher margin of safety and investment protection than current generation reactors. Evacuation or sheltering of the public is not required. The major components of the nuclear steam supply, with special emphasis on the core, are described. Safety assessments of the concept are discussed.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Modular High Temperature Gas Cooled Reactor (MHTGR) design meets stringent top-level regulatory and user safety requirements that require that the normal and off-normal operation of the plant not disturb the public's day-to-day activities. Quantitative, top-level regulatory criteria have been specified from US NRC and EPA sources to guide the design. The user/utility group has further specified that these criteria be met at the plant boundary. The focus of the safety approach has then been centered on retaining the radionuclide inventory within the fuel by removing core heat, controlling chemical attack, and by controlling heat generation. The MHTGR is shown to passively meet the stringent requirements with margin. No operator action is required and the plant is insensitive to operator error.
Author: International Atomic Energy Agency Publisher: ISBN: 9789201253101 Category : Business & Economics Languages : en Pages : 639
Book Description
This publication reports on the results of a coordinated research project on advances in high temperature gas cooled reactor (HTGR) fuel technology and describes the findings of research activities on coated particle developments. These comprise two specific benchmark exercises with the application of HTGR fuel performance and fission product release codes, which helped compare the quality and validity of the computer models against experimental data. The project participants also examined techniques for fuel characterization and advanced quality assessment/quality control. The key exercise included a round-robin experimental study on the measurements of fuel kernel and particle coating properties of recent Korean, South African and US coated particle productions applying the respective qualification measures of each participating Member State. The summary report documents the results and conclusions achieved by the project and underlines the added value to contemporary knowledge on HTGR fuel.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The Modular High-Temperature Gas-Cooled Reactor (MHTGR) is an advanced power plant concept which has been under design definition since 1984. The design utilizes basic high-temperature gas-cooled reactor features of ceramic fuel, helium coolant and a graphite moderator which have been under development for 30 years. The geometric arrangement of the reactor vessels, the core and the heat removal components has been selected to exploit the inherent characteristics associated with high temperature materials. The design utilizes passively safe features which provide a higher margin of safety and investment protection than current generation reactors. The design has been evaluated to be economically attractive relative to modern coal fired plants. The design and development program is a cooperative effort by the US government, the utilities and the nuclear industry. 8 refs., 4 figs., 4 tabs.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
This paper presents the approach used to define the technology program needed to support design and licensing of a Modular High-Temperature Gas-Cooled Reactor (MHTGR). The MHTGR design depends heavily on data and information developed during the past 25 years to support large HTGR (LHTGR) designs. The technology program focuses on MHTGR-specific operating and accident conditions, and on validation of models and assumptions developed using LHTGR data. The technology program is briefly outlined, and a schedule is presented for completion of technology work which is consistent with completion of a Final Safety Summary Analysis Report (FSSAR) by 1992.
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Author: International Atomic Energy Agency
Author: F. A. Silady
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