Environmental Impacts of the Modular High Temperature Gas-cooled Reactor (MHTGR) PDF Download
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Author: Scott William Pappano
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ISBN:
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Languages : en
Pages : 404
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Author: Scott William Pappano
Publisher:
ISBN:
Category :
Languages : en
Pages : 404
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Author:
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Category :
Languages : en
Pages :
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The Modular High-Temperature Gas-Cooled Reactor (MHTGR) is an advanced reactor concept being developed under a cooperative program involving the US Government, the utilities and the nuclear industry. This plant design utilizes basic High Temperature Gas-Cooled Reactor (HTGR) features of ceramic fuel, helium coolant, and a graphite moderator. The MHTGR design approach leading to exceptional safety performance also leads to plant operation which is characterized by extremely low radiological emissions even for very low probability accidents. Coated fuel particles retain radionuclides within the fuel, thus minimizing material contamination and personnel exposure. The objective of this paper is to characterize radioactive effluents expected from the normal operation of an MHTGR. In addition, other nonradioactive effluents associated with a power generating facility are discussed. Nuclear power plants produce radioactive effluents during normal operation in gaseous, liquid and solid forms. Principal sources of radioactive waste within the MHTGR are identified. The manner in which it is planned to treat these wastes is described. Like other reactors, the MHTGR produces nonradioactive effluents associated with heat generation and chemical usage. However, due to the MHTGR's higher efficiency, water usage requirements and chemical discharges for the MHTGR are minimized relative to other types of nuclear power plants. Based upon prior operating HTGR experience and analysis, effluents are quantified in terms of radioactivity levels and/or emission volume. Results, quantified within the paper, demonstrate that effluents from the MHTGR are well below regulatory limits and that the MHTGR has a minimal impact upon the public and the environment. 14 refs., 2 figs., 4 tabs.
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Languages : en
Pages :
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The MHTGR is an advanced reactor concept being developed under a cooperative program involving the US Government, the utilities and the nuclear industry. The programs objective is the development of an environmentally safe, reliable, and economic nuclear power option for the USA and other nations of the world. HTGR design features, such as the ceramic fuel, helium coolant, and graphite moderator, are incorporated into the MHTGR reference plant design which incorporates four 350 MW(t) reactor modules. This papers objective is to describe those plant features, which minimize the environmental impact of MHTGR operation through efficient energy production, management of normal plant non-radioactive/radioactive effluents, and inherent characteristics and passive safety features which ensure benign plant site suitability source terms. 16 refs.
Author: International Atomic Energy Agency
Publisher:
ISBN: 9789201253101
Category : Business & Economics
Languages : en
Pages : 639
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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:
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ISBN:
Category :
Languages : en
Pages : 726
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Languages : en
Pages :
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From ANS topical meeting on gas-cooled reactors: HTGR and GCFBR; Gatlinburg, Tennessee, USA (8 May 1974). The high-temperature gas-cooled reactor power station has all of the potential environmental impacts associated with any large nuclear station. Construction impacts can be minimized by proper planning and are usually of limited duration. The potentially most significant impacts of station operation result from the operation of the heat dissipation system. The use of cooling towers is assumed. The effects of salt deposition, fogging, and icing are expected to be minor. The magnitude of the adverse effects caused by intake and discharge such as entrainment of eggs, larvae, and fish and chemical impacts from blowdown can only be assessed for a specific site but may be signlficant. The impact of radionuclide releases, constrained by the as-low-as- is-practicable criteria, is small. The only potential environmental advantage over other reactor types is lower consumptive water use for the same net electric power production. (auth).
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Languages : en
Pages :
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![The Effect of Water Vapor in the Reactor Cavity in a MHTGR [Modular High Temperature Gas Cooled Reactor] on the Radiation Heat Transfer PDF](https://books.google.com/books/content/images/frontcover/fbyEmwEACAAJ?fife=w80-h100)
Author: M.W. Cappiello
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ISBN:
Category :
Languages : en
Pages :
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Author: D. J. Naus
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ISBN:
Category : Concrete
Languages : en
Pages : 69
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Author:
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ISBN:
Category :
Languages : en
Pages :
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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.
