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Results And Implications Of The Ebr Ii Inherent Safety Demonstration Tests
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Book Synopsis Results and Implications of the EBR-II Inherent Safety Demonstration Tests by :
Download or read book Results and Implications of the EBR-II Inherent Safety Demonstration Tests written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: On April 3, 1986 two milestone tests were conducted in Experimental Breeder Reactor-2 (EBR-II). The first test was a loss of flow without scram and the second was a loss of heat sink without scram. Both tests were initiated from 100% power and in both tests the reactor was shut down by natural processes, principally thermal expansion, without automatic scram, operator intervention or the help of special in-core devices. The temperature transients during the tests were mild, as predicted, and there was no damage to the core or reactor plant structures. In a general sense, therefore, the tests plus supporting analysis demonstrated the feasibility of inherent passive shutdown for undercooling accidents in metal-fueled LMRs. The results provide a technical basis for future experiments in EBR-II to demonstrate inherent safety for overpower accidents and provide data for validation of computer codes used for design and safety analysis of inherently safe reactor plants.
Book Synopsis EBR-II Inherent Shutdown and Heat Removal Tests by :
Download or read book EBR-II Inherent Shutdown and Heat Removal Tests written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of inherently safe characteristics of LMFBR systems is being conducted in EBR-II. Experiments have been conducted which show (1) capabilities of heat removal without the aid of active safety systems and (2) capabilities to mitigate a reduction in-core cooling flow or heat rejection to the balance of plant (BOP) without aid of active control or protection systems. Experiments involving loss of forced reactor cooling flow and loss of all heat rejection to the BOP are planned to be conducted. Purpose of this paper is to summarize the result of the test program by presenting representative test data.
Book Synopsis Demonstration of Passive Safety Features in EBR-II. by :
Download or read book Demonstration of Passive Safety Features in EBR-II. written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two tests of great importance to the design of future commercial nuclear power plants were carried out in the Experimental Breeder Reactor-II on April 3, 1986. These tests, (viewed by about 60 visitors, including 13 foreign LMR specialists) were a loss of flow without scram and a loss of heat sink without scram, both from 100% initial power. In these tests, inherent feedback shut the reactor down without damage to the fuel or other reactor components. This resulted primarily from advantageous characteristics of the metal driver fuel used in EBR-II. Work is currently underway at EBR-II to develop a control strategy that promotes inherent safety characteristics, including survivability of transient overpower accidents. In parallel, work is underway at EBR-II on the development of state-of-the-art plant diagnostic techniques.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1987 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Safety Implications from 20 Years of Operating Experience at EBR-II. by :
Download or read book Safety Implications from 20 Years of Operating Experience at EBR-II. written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: EBR-II recently passed a major milestone in its operating history, 20 years of operation on August 13, 1984. The plant has gone through three major program phases during this time and is now entering a fourth. Those are: (1) demonstration of the feasibility of a complete LMFBR power plant, including on-site reprocessing of metal fuel, (2) irradiation testing of fuels and materials to support core and fuel design for CRBR and FFTF, (3) operational-safety testing to establish and demonstrate the inherent safety of LMFBRs and now, (4) the integration of this technology into demonstration of the integral fast reactor (IFR) concept. As EBR-II has progressed through these phases, much has been learned that is relevant to fast-reactor safety.
Book Synopsis EBR-II Dry Critical Experiments by :
Download or read book EBR-II Dry Critical Experiments written by and published by . This book was released on 1962 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: These experiments are preoperational zero-power nuclear investigations in the Experimental Breeder Reactor II (EBR-II) prior to insertion of sodium coolant. The experiments were performed with the power reactor instruments, fuel and mechanical components installed. The measured dry critical size, reactivity worth of control mechanisms and isothermal temperature coefficient of reactivity are in good agreement with predicted values. Additional measurements include neutron flux distributions in the uranium reflector and outside the reactor neutron shield.
Download or read book Nuclear Safety written by and published by . This book was released on 1986 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Risk and Safety Analysis of Nuclear Systems by : John C. Lee
Download or read book Risk and Safety Analysis of Nuclear Systems written by John C. Lee and published by John Wiley & Sons. This book was released on 2011-07-05 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book has been developed in conjunction with NERS 462, a course offered every year to seniors and graduate students in the University of Michigan NERS program. The first half of the book covers the principles of risk analysis, the techniques used to develop and update a reliability data base, the reliability of multi-component systems, Markov methods used to analyze the unavailability of systems with repairs, fault trees and event trees used in probabilistic risk assessments (PRAs), and failure modes of systems. All of this material is general enough that it could be used in non-nuclear applications, although there is an emphasis placed on the analysis of nuclear systems. The second half of the book covers the safety analysis of nuclear energy systems, an analysis of major accidents and incidents that occurred in commercial nuclear plants, applications of PRA techniques to the safety analysis of nuclear power plants (focusing on a major PRA study for five nuclear power plants), practical PRA examples, and emerging techniques in the structure of dynamic event trees and fault trees that can provide a more realistic representation of complex sequences of events. The book concludes with a discussion on passive safety features of advanced nuclear energy systems under development and approaches taken for risk-informed regulations for nuclear plants.
Download or read book LMFBR Operational Safety written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mission of the Experimental Breeder Reactor II (EBR-II) has evolved from that of a small LMFBR demonstration plant to a major irradiation-test facility. Because of that evolution, many operational-safety issues have been encountered. The paper describes the EBR-II operational-safety experience in four areas: protection-system design, safety-document preparation, tests of off-normal reactor conditions, and tests of elements with breached cladding.
Book Synopsis Plant Inherent Control Testing in EBR-II. by :
Download or read book Plant Inherent Control Testing in EBR-II. written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A testing program is being conducted in EBR-II to demonstrate passive, inherent reactor protection and control. Data obtained from tests have indicated that the reactor power can be controlled over a large range by the primary coolant flow, secondary coolant flow, and the turbine/generator load. Reactor safety could then be based on inherent safe characteristics of the plant rather than the complicated reactor shutdown system. A Plant Inherent Control Testing (PICT) program is being developed in EBR-II to investigate inherent control concepts for LMR's. The reactor power will be controlled between 40 and 100% power with the primary coolant pumps, the secondary coolant pumps, and the turbine admission valve. The thermal-hydraulic-neutronic system analysis code NATDEMO was used for the pretest predictions of the EBR-II plant response. This paper presents the results of this analysis.
Book Synopsis Operational-safety Advantages of LMFBR's by :
Download or read book Operational-safety Advantages of LMFBR's written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LMFBR's contain many inherent characteristics that simplify control and improve operating safety and reliability. The EBR-II design is such that good advantage was taken of these characteristics, resulting in a vary favorable operating history and allowing for a program of off-normal testing to further demonstrate the safe response of LMFBR's to upsets. The experience already gained, and that expected from the future testing program, will contribute to further development of design and safety criteria for LMFBR's. Inherently safe characteristics are emphasized and include natural convective flow for decay heat removal, minimal need for emergency power and a large negative reactivity feedback coefficient. These characteristics at EBR-II allow for ready application of computer diagnosis and control to demonstrate their effectiveness in response to simulated plant accidents. This latter testing objective is an important part in improvements in the man-machine interface. (MMI).
Book Synopsis Predicted and Measured Response of the EBR-II Plant to Large Steam Pressure Changes by :
Download or read book Predicted and Measured Response of the EBR-II Plant to Large Steam Pressure Changes written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Experimental Breeder Reactor II (EBR-II) is a liquid metal reactor (LMR) whose sodium-bonded metallic fuel core has substantial negative reactivity feedback. It has been demonstrated that this feedback enables a loss-of-flow without scram (LOFWS) to shut the reactor down without operator action. This inherent effect also causes a reactor shutdown following a loss-of-heat-sink without scram (LOHSWS). On April 3, 1986, an LOFWS and an LOHSWS were each performed from full power. In the latter test the secondary sodium flow was reduced to less than 1% about three minutes. This caused the reactor inlet temperature to increase only about 45°C and essentially stopped the fission process and shut the reactor down. These tests demonstrated that an LMR plant can be designed in which natural phenomena, rather than electromechanical systems (such as those which move control rods), are effective in protecting the reactor against the potentially adverse consequences of loss-of-primary-flow and loss-of-heat-sink accidents. Moreover, the same phenomena which shut the reactor down during these two tests could be exploited to allow primary flow or inlet temperature, rather than control rods, to be used to maneuver plant output within a considerable power range. This capability would enable an LMR to be designed in which far less reactivity is invested in the control rods than is currently the practice. The ultimate goal is to design an ''inherently safe'' LMR in which reactor safety does not depend upon control rods and also where severe rod withdrawal accidents do not need to be considered.
Book Synopsis Safety and Operating Experience at EBR-II by :
Download or read book Safety and Operating Experience at EBR-II written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: EBR-II is a small LMFBR power plant that has performed safely and reliably for 16 years. Much has been learned from operating it to facilitate the design, licensing, and operation of large commercial LMFBR power plants in the US. EBR-II has been found relatively easy to keep in conformity with evolving safety requirements, largely because of inherent safety features of the plant. Such features reduce dependence on active safety systems to protect against accidents. EBR-II has experienced a number of plant-transient incidents, some planned, others inadvertent; none has resulted in any significant plant damage. The operating experience with EBR-II has led to the formulation of an Operational Reliability Test Program (ORTP), aimed at showing inherently safe performance of fuel and plant systems.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1987 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis EBR-II Dry Critical Experiments by : L. J. Koch
Download or read book EBR-II Dry Critical Experiments written by L. J. Koch and published by . This book was released on 1961 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revisions in the reactor system and operating procedures necessary for carrying out a proposed dry critical experiment in the EBR-II are described. The safety aspect of the program is considered. The critical experiment will be conducted in the EBR-II prior to filling the primary system with sodium. The facility, experimental program, operational and experimental procedures, and hazards and plant safety are described.
Book Synopsis Dynamics and Control in Nuclear Power Stations by : British Nuclear Energy Society
Download or read book Dynamics and Control in Nuclear Power Stations written by British Nuclear Energy Society and published by Thomas Telford. This book was released on 1992 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers a wider view of the aspects of control of nuclear power stations by taking into consideration the plant as a whole and the protection systems employed therein. Authors with world-wide experience consider all the aspects of dynamics and control in the context of both fast and thermal power stations. The topics discussed include both the methods of development and applications within - analysis of plant behaviour, validation of mathematical models, plant testing, design and implementation of controls.
