The Impact of Passive Safety Systems on Desirability of Advanced Light Water Reactors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Impact of Passive Safety Systems on Desirability of Advanced Light Water Reactors write by Ryan C. Eul. This book was released on 2006. The Impact of Passive Safety Systems on Desirability of Advanced Light Water Reactors available in PDF, EPUB and Kindle. This work investigates whether the advanced light water reactor designs with passive safety systems are more desirable than advanced reactor designs with active safety systems from the point of view of uncertainty in the performance of safety systems as well as the economic implications of the passive safety systems. Two advanced pressurized water reactors and two advanced boiling water reactors, one representing passive reactors and the other active reactors for each type of coolant, are compared in terms of operation and responses to accidents as reported by the vendors. Considering a simplified decay heat removal system that utilizes an isolation condenser for decay heat removal, the uncertainty in the main parameters affecting the system performance upon a reactor isolation accident is characterized when the system is to rely on natural convection and when it is to rely on a pump to remove the core heat. It is found that the passive system is less certain in its performance if the pump of the active system is tested at least once every five months. In addition, a cost model is used to evaluate the economic differences and benefits between the active and passive reactors. It is found that while the passive systems could have the benefit of fewer components to inspect and maintain during operation, they do suffer from a larger uncertainty about the time that would be required for their licensing due to more limited data on the reliability of their operation. Finally, a survey among nuclear energy experts with a variety of affiliations was conducted to determine the current professional attitude towards these two competing nuclear design options. The results of the survey show that reactors with passive safety systems are more desirable among the surveyed expert groups. The perceived advantages of passive systems are an increase in plant safety with a decrease in cost.
Contribution to the development of passive safety systems for advanced light water reactors
Contribution to the development of passive safety systems for advanced light water reactors - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Contribution to the development of passive safety systems for advanced light water reactors write by Lluís Batet Miracle. This book was released on 2004. Contribution to the development of passive safety systems for advanced light water reactors available in PDF, EPUB and Kindle.
Light Water Reactor Safety
Light Water Reactor Safety - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Light Water Reactor Safety write by B. Pershagen. This book was released on 2013-10-22. Light Water Reactor Safety available in PDF, EPUB and Kindle. This book describes the principles and practices of reactor safety as applied to the design, regulation and operation of light water reactors, combining a historical approach with an up-to-date account of the safety, technology and operating experience of both pressurized water reactors and boiling water reactors. The introductory chapters set out the basic facts upon which the safety of light water reactors depend. The central section is devoted to the methods and results of safety analysis. The accidents at Three Mile Island and Chernobyl are reviewed and their implications for light water reactor safety are discussed. The concluding chapters examine selected safety issues and their resolution, and highlight results of reactor safety research. The book is amply illustrated, with numerous cross references and a comprehensive index.
Issues Affecting Advanced Passive Light-water Reactor Safety Analysis
Issues Affecting Advanced Passive Light-water Reactor Safety Analysis - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Issues Affecting Advanced Passive Light-water Reactor Safety Analysis write by . This book was released on 1992. Issues Affecting Advanced Passive Light-water Reactor Safety Analysis available in PDF, EPUB and Kindle. Next generation commercial reactor designs emphasize enhanced safety through improved safety system reliability and performance by means of system simplification and reliance on immutable natural forces for system operation. Simulating the performance of these safety systems will be central to analytical safety evaluation of advanced passive reactor designs. Yet the characteristically small driving forces of these safety systems pose challenging computational problems to current thermal-hydraulic systems analysis codes. Additionally, the safety systems generally interact closely with one another, requiring accurate, integrated simulation of the nuclear steam supply system, engineered safeguards and containment. Furthermore, numerical safety analysis of these advanced passive reactor designs wig necessitate simulation of long-duration, slowly-developing transients compared with current reactor designs. The composite effects of small computational inaccuracies on induced system interactions and perturbations over long periods may well lead to predicted results which are significantly different than would otherwise be expected or might actually occur. Comparisons between the engineered safety features of competing US advanced light water reactor designs and analogous present day reactor designs are examined relative to the adequacy of existing thermal-hydraulic safety codes in predicting the mechanisms of passive safety. Areas where existing codes might require modification, extension or assessment relative to passive safety designs are identified. Conclusions concerning the applicability of these codes to advanced passive light water reactor safety analysis are presented.
Study of Cost Effective Large Advanced Pressurized Water Reactors that Employ Passive Safety Features
Study of Cost Effective Large Advanced Pressurized Water Reactors that Employ Passive Safety Features - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Study of Cost Effective Large Advanced Pressurized Water Reactors that Employ Passive Safety Features write by Y. Hayashi. This book was released on 2003. Study of Cost Effective Large Advanced Pressurized Water Reactors that Employ Passive Safety Features available in PDF, EPUB and Kindle. A report of DOE sponsored portions of AP1000 Design Certification effort. On December 16, 1999, The United States Nuclear Regulatory Commission issued Design Certification of the AP600 standard nuclear reactor design. This culminated an 8-year review of the AP600 design, safety analysis and probabilistic risk assessment. The AP600 is a 600 MWe reactor that utilizes passive safety features that, once actuated, depend only on natural forces such as gravity and natural circulation to perform all required safety functions. These passive safety systems result in increased plant safety and have also significantly simplified plant systems and equipment, resulting in simplified plant operation and maintenance. The AP600 meets NRC deterministic safety criteria and probabilistic risk criteria with large margins. A summary comparison of key passive safety system design features is provided in Table 1. These key features are discussed due to their importance in affecting the key thermal-hydraulic phenomenon exhibited by the passive safety systems in critical areas. The scope of some of the design changes to the AP600 is described. These changes are the ones that are important in evaluating the passive plant design features embodied in the certified AP600 standard plant design. These design changes are incorporated into the AP1000 standard plant design that Westinghouse is certifying under 10 CFR Part 52. In conclusion, this report describes the results of the representative design certification activities that were partially supported by the Nuclear Energy Research Initiative. These activities are unique to AP1000, but are representative of research activities that must be driven to conclusion to realize successful licensing of the next generation of nuclear power plants in the United States.
