دانلود رایگان مقاله لاتین اورانیوم آب دریا از سایت الزویر
عنوان فارسی مقاله:
تامین انرژی پایدار و ایمن با تقویت HTGR اورانیوم آب دریا و صرفه جویی آن
عنوان انگلیسی مقاله:
Sustainable and safe energy supply with seawater uranium fueled HTGR and its economy
سال انتشار : 2017
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مقدمه انگلیسی مقاله:
1. Introduction
Nuclear power is an attractive energy source of clean-air and carbon-free electricity, that produces no greenhouse gases or air pollutants. However, on March 11, 2011, during the Fukushima Daiichi nuclear power plant disaster in Japan, radioactivity in Light Water Reactors (LWRs) released to the environment. The accident occurred even for a LWR that has the inherent safety feature of shutting itself down to a subcritical state during the operation. That is self-regulation feature. However, the decay heat removal from the core, of which system should be designed to work under any circumstance, is failed after the shutdown. It is found from the accident that not only the inherent safety features to shut itself down safely but also the inherent safety feature for heat removal is necessary for the safety of Nuclear Power Plant (NPP). In this context, one of the alternative candidates safer than LWR is High Temperature Gas-cooled Reactor (HTGR). To achieve the inherent safety feature of self-regulation characteristics, one of the designs is the thermal reactor with undermoderated design (Lewis, 1977). The design concept is employed for LWR to obtain negative reactivity coefficient of coolant temperature for Pressurized Water Reactor (PWR) and negative reactivity coefficient of coolant void for Boiling Water Reactor (BWR). The most all of HTGRs is designed in under-moderated region even though the spectrum is softer than LWR as described in the Section 2, and the solid moderator of graphite is never voided. HTGR has outstanding safety features of core heat removal (Ohashi et al., 2011). The fuel temperature is maintained under the design limit by the passive heat removal from outside the Reactor Pressure Vessel (RPV) with high thermal conductivity of core graphite and low core power density in both normal operation condition and an accident. The large heat capacity of core graphite moderates the change of the core temperature even in the transient event, such as a depressurized accident and a Reactivity Insertion Accident (RIA). The heat removal from the RPV to the ultimate heat sink, i.e. soil or air, is achieved through radiation and natural convection of air in the reactor cavity at a loss of forced cooling of the core
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کلمات کلیدی:
Sustainability and economy of energy supply with HTGR fueled by ... jolissrch-inter.tokai-sc.jaea.go.jp/search/servlet/search?5043918&language=1 Sustainability and economy of energy supply with HTGR fueled by uranium from seawater have been investigated. To sustain the nuclear energy safely by ... [PDF]STATUS AND PROSPECTS FOR SMALL AND MEDIUM SIZED ... www.iaea.org/inis/collection/NCLCollectionStore/_Public/31/060/31060492.pdf by J KUPITZ - Cited by 3 - Related articles heating, and seawater desalination, to up to 1000°C for process steam and heat for ... the high temperature gas cooled, graphite-moderated reactor (HTGR). ... Nuclear energy supplies a significant portion of the world electricity demand. .... water cooling by natural circulation, low enriched uranium fuel, integrated and self. Global Warming and Nuclear Power https://books.google.com/books?id=6AsAAAAAMBAJ Bulletin of the Atomic Scientists - Vol. 46, No. 3 - Magazine Solutions were quickly offered, including energy conservation and alternatives such as solar. .... uranium recovery from seawater, and perhaps a fusion/fission hybrid reactor. ..... An HTGR operating on a denatured uranium-thorium, once-through fuel ... Fortunately, however, the growing energy supply competition to nuclear ... [PDF]Nuclear Power and Energy Security: A Revised Strategy for Japan scienceandglobalsecurity.org/archive/sgs10lidsky.pdf by LM Lidsky - 2002 - Cited by 26 - Related articles Aug 19, 2002 - from seawater were initiated more than 30 years ago in England,3 it is the ... might allow nuclear power to play a greater role in energy supply and energy ... to use an enriched uranium fueled, light water cooled reactor, ...... Proceedings of the 2nd JAERI Symposium on HTGR Technologies, Orai, Japan,. Energy crisis - Sep 1971 - Page 2 - Google Books Result https://books.google.com/books?id=jAsAAAAAMBAJ Bulletin of the Atomic Scientists - Magazine The breeder reactor breeds plutonium fuel from uranium-238. ..... An abundant supply of electric energy generated at low cost with minimal adverse ..... generator are all contained within a prestressed concrete pressure vessel, as in the HTGR. ...... It has been estimated that one gallon of seawater has the deuterium energy ...
