求一篇介绍二次能源的英文作文要求：1.介绍两个能源利润，风能，核能，水能等，介绍两个2.一定要自己写的，没有能力自己写而从网上复制的就不要回答了。老师会用turnitin检查。不要害

求一篇介绍二次能源的英文作文要求：1.介绍两个能源利润，风能，核能，水能等，介绍两个2.一定要自己写的，没有能力自己写而从网上复制的就不要回答了。老师会用turnitin检查。不要害
求一篇介绍二次能源的英文作文
要求：
1.介绍两个能源
利润，风能，核能，水能等，介绍两个
2.一定要自己写的，没有能力自己写而从网上复制的就不要回答了。老师会用turnitin检查。不要害了我。
3.我不吝啬分数，不要求写的能有多好，最主要字数要合格，两页word。
4.要求有一个调查报告，调查报告就不用写了，但要求有一个conclusion，我会按照您的conclusion指定报告
切记，勿抄，勿拼凑。

求一篇介绍二次能源的英文作文要求：1.介绍两个能源利润，风能，核能，水能等，介绍两个2.一定要自己写的，没有能力自己写而从网上复制的就不要回答了。老师会用turnitin检查。不要害
According to widely accepted view, the existing nuclear power system is divided into three generations:
(1) of the last century the late 50's early 60's the first prototype nuclear power plant construction;
(2) 60's to 70's built a large number of unit capacity in the 600 ~ 1400 MW of the standard nuclear power plant, which is currently the world's 439 nuclear power plants are running (June 2002 statistics) of the subject;
(3) 80, began development in the market since the late 90's advanced light water reactor (ALWR) nuclear power plant.
Gen-IV concept was first in the June 1999 meeting of the American Nuclear Society's annual meeting. In the winter that year in November at the annual meeting of the Society to further the development of a clear vision of Gen-IV. United States, France, Japan, Britain and other nuclear countries formed in 2000, Gen-IV International Forum, to be used 2 to 3 years to complete development of Gen-IV research and development objectives plan. The overall goal of this project is around 2030, to provide to the market economy can solve nuclear energy, safety, waste disposal and the prevention of nuclear proliferation Gen-IV.
2 Gen-IV research and development goals
The current Gen-IV advanced nuclear energy system concept is still relatively vague, the international community has no exact definition. However, there has been clear that the "advanced nuclear energy systems" rather than "advanced reactors." It should meet the security, economic, sustainable development, minimal waste generation, fuel, and low risk of the proliferation of basic standards.
2.1 The goal of sustainability
Comparison of the authority in accordance with the definition of the essence of sustainability is how to sustain Earth's life support systems to meet basic human needs. For a particular system, it is a default in the stated objectives and can successfully stage the degree of its development, coordination, sustainability, sustainable development and stable binding within the threshold probability, that is, its success extended to sustainable development goals. Gen-IV of the sustainability objectives include the efficient use of fuel, waste management and nuclear proliferation in the physical limit. Namely:
Sustainability objective 1: Gen-IV will be available worldwide to meet clean air requirements, long-term, reliable, fuel efficient use of sustainable energy.
Sustainability objective 2: Gen-IV nuclear waste generated was minimal; used in nuclear waste management will be both properly safe disposal of nuclear waste, but also significantly reduce the dose of the staff to improve public health and protection of the environment.
Sustainability objective 3: Gen-IV nuclear fuel cycle should lead to commercial possibilities of nuclear proliferation limited to a minimum, making it difficult to be converted to military use, and to prevent terrorist activities in the physical provision of more effective measures.
2.2 The objectives of security and reliability
R & D in nuclear energy systems and operation, safety and reliability is a priority fundamentals. In normal operation, or hypothetical transient conditions, nuclear energy systems must maintain its safety margin, to prevent accidents and incidents are effective mitigation measures. At the same time, requiring a high reliability.
Over the years, improved security and reliability of nuclear energy systems, reducing the frequency of radioactive release outside the plant and thereby reduce the probability of a serious accident, has been a clear trend. Gen-IV through further improvements to achieve higher security and reliability, to better protect employees, public health and the environment. In this regard, Gen-IV also has three objectives:
Safety and reliability objectives 1: Gen-IV in a safe and reliable operation will be significantly better than other aspects of nuclear energy systems.
The goal is to induce an accident or by reducing the general accident incident evolved into a serious accident, equipment problems and human factors to increase the number of questions the safety of operation. This goal is also to improve the reliability of nuclear power by strengthening the economy of the system. To achieve these operational goals, to support strengthening of public confidence in the safety demonstration, you need to make appropriate design requirements and be careful.
In order to improve the security and reliability to the highest level, fourth-generation nuclear energy systems must continue to use the industry and regulators to enhance public confidence and to establish relevant laws and regulations, and using future advanced technologies.
Safety and reliability goals 2: Gen-IV core damage highly unlikely; even damage, the degree is also very light.
The goal of the owner / operation is vitally important. Over the years, people have been committed to reducing the probability of core damage. The measures include the use of PRA methods to develop user requirements documents, in the introduction of passive safety systems concepts.
Safety and reliability of objective 3: in the accident outside the plant under the conditions of no release, no plants outside the emergency.
The public, especially those living in the vicinity of nuclear facilities, the residents of the need to secure nuclear power plant outside the emergency is not a reliable proof. Therefore, Gen-IV design direction is an effort on the design and use of advanced technology through the abolition of emergency outside the factory. This is a revolutionary improvement of nuclear safety, it shows: no matter what nuclear power plant accident, will not result in damage to the public outside the plant.
2.3 Economic objectives
Gen-IV would take significant steps to reduce the cost of new nuclear power plant investment and financial risk, or its sustainability, safety and reliability of the advantages would be higher capital costs and generation costs and the corresponding high-risk flood. For a long time, nuclear power plants mainly with basic load. This situation is changing, the global energy market is controlled by the transition to deregulation, there will be more independent power generation companies and business owners (who runs) into the deregulated electricity market. This means that the nuclear power plant being developed to consider the potential for more plant owners, the future of nuclear energy system to adapt to different requirements, including load following and power smaller units. Most of 已建和在建 economic competitiveness of nuclear power stations is not ideal. As China's energy sector development and deepening of power system, improve the economy of the requirements of nuclear power will be more urgent. Currently, the unit cost of new nuclear power plants ($ 1500 ~ 2000/kW, is the unit cost of fossil fuel power plants 2 to 4 times) and longer construction time, processing time, retired time, with other power production methods should not be compared The. To be able to compete with other electricity production, nuclear power plant construction should be met:
* Initial investment (overnight rate) is less than $ 1,000 per kilowatt;
* The total cost of electricity production should be less than 3 cents / kWh;
* Construction period is less than 3 years.
Economic goals 1: Gen-IV period in the whole economy of life is better than other energy systems.
To ensure that nuclear energy system has become the world's energy supply system in an indispensable part of the needs of the whole life cost advantage of the period. Lifecycle costs include four major components: construction investment, operation and maintenance costs, fuel cycle costs, decommissioning and decontamination costs. There are other important factors affecting the whole life cycle costs, such as financing conditions, the duration of the project, construction progress, the capacity factor and power plant life. Currently, the investment cost is high and the construction of new nuclear power plants is too long the major obstacles in the financial, operating and maintenance costs while the existing power plant has been greatly improved in recent years. Of Gen-IV, the whole life cycle costs of all the factors to be better than other energy sources (including the existing core systems) to ensure their competitiveness.
Economic objective 2: Gen-IV level of the financial risk of financial and other energy projects the level of risk.
In a competitive capital market, to raise the funds needed for the building, Gen-IV on the financial risk must be reduced to or remain in the competition for new levels of project financing.

It has also puzzled those who devote into environmental protection to depollute the nuclear source of energy and to conduct the nuclear waste.