Download or read book Research Reactor Coolant Monitoring Using Automated Gamma Ray Spectrometry written by Warren Kermit TenBrook and published by . This book was released on 1986 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated sampling and gamma ray spectrometry system has been developed for analysis of TRIGA reactor primary cooling water. A microcomputer controls pumps and valves using BASIC and assembly language programs to pump 300 ml liquid samples into a reference geometry surrounding a Ge(Li) detector. Gamma ray spectra are acquired by a multichannel buffer and are analyzed by a software sequence executed on an IBM PC XT. After analysis the sample can be routed to holding containers or a waste container, depending on a user-selected option. The system is also configured as an on-line coolant monitor, using a Nal(Tl) detector to measure the gross gamma ray activity in the primary line in conjunction with a binary counting chip read under software control. When the gross count rate exceeds a user-selected threshold, a sample is automatically tapped from the primary line, its gamma ray spectrum is analyzed, and an analysis report is printed. The sampling system was used to remove sequential samples of coolant from the TRIGA primary system at hourly intervals during one megawatt operation. Neutron activation production terms for AlAr, 56Mn and 2ANa were determined. An overnight analysis of the AlAr, 56Mn and 24Na were determined. An overnight analysis of the primary coolant was also performed to determine the analytical sensitivity of the system using long spectral acquisition times. Finally, the autoanalysis software was used to automatically obtain and analyze a coolant sample, while storing a second sample in a holding container. The holding container sample was analyzed using a separate detector system to independently verify the activity reported during the autoanalysis.
Download or read book Analysis of Proposed Gamma ray Detection System for the Monitoring of Core Water Inventory in a Pressurized Water Reactor written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An initial study has been performed of the feasibility of employing an axial array of gamma detectors located outside the pressure vessel to monitor the coolant in a PWR. A one-dimensional transport analysis model is developed for the LOFT research reactor and for a mock-PWR geometry. The gamma detector response to coolant voiding in the core and downcomer has been determined for both geometries. The effects of various conditions (for example, time after shutdown, materials in the transport path, and the relative void fraction in different water regions) on the detector response are studied. The calculational results have been validated by a favorable comparison with LOFT experimental data. Within the limitations and approximations considered in the analysis, the results indicate that the gamma-ray detection scheme is able to unambiguously respond to changes in the coolant inventory within any vessel water region.
Download or read book Analysis of Proposed Gamma Ray Detection System for the Monitoring of Core Water Inventory in Pressurized Water Reactors written by Diane Melanie Markoff and published by . This book was released on 1986 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radioactivity of Nuclear Reactor Cooling Fluids written by John Clayton Ward and published by . This book was released on 1961 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Measuring the Specific Activity of Radioactive Coolant in a Pipe written by E. Czapek and published by . This book was released on 1960 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proposed Reactor Coolant Density Monitor written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Until now there has been no feasible method of monitoring coolant density in the environment of an operating reactor core. By analysis of output from self-powered neutron detectors (SPNDs) in the core of the Loss of Fluid Test (LOFT) Reactor, the author has successfully estimated local coolant densities under post-scram conditions during a large break loss of coolant transient. The model used for estimation is not fully explained by published principles on the interaction of gamma rays with SPNDs. However, based on the success of the model, the author proposes employing self powered gamma detectors (SPGDs) to monitor reactor coolant density and discusses areas of experimental work to establish the best conditions for this application. 9 refs., 12 figs.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Research Reactors written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2014 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is a comprehensive study that reviews the current situation in a great number of applications of research reactors. It revises the contents of IAEA TECDOC-1234, The Applications of Research Reactors, giving detailed updates on each field of research reactor uses worldwide. Reactors of all sizes and capabilities can benefit from the sharing of current practices and research enabled via this updated version, which describes the requirements for practicing methods as diverse as neutron activation analysis, education and training, neutron scattering and neutron imaging, silicon doping and radioisotope production, material/fuel irradiation and testing, and some others. Many underutilised research reactors can learn how to diversify their technical capabilities, staff and potential commercial partners and users seeking research reactor services and products. The content of the publication has also been strengthened in terms of current issues facing the vast majority of research reactors by including sections describing user and customer relations as well as strategic planning considerations.
Download or read book Reactor Coolant and Associated Systems in Nuclear Power Plants written by International Atomic Energy Agency and published by . This book was released on 1986 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the safety design considerations for various reactor coolant and associated systems for operational states and accident conditions including the selection, sizing and reliability aspects. This includes safety systems such as emergency core cooling, residual heat removal or emergency feedwater systems.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1964 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Continuous Surveillance of Reactor Coolant Circuit Integrity written by and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1985 with total page 296 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 1993 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interference Problems on Wing fuselage Combinations in Inviscid Incompressible Flow written by Aeronautical Research Council (Great Britain) and published by . This book was released on 1974 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Routine and Post accident Analysis of Nuclear Power Plant Reactor Coolant written by Eva I. Jolma and published by . This book was released on 1983 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1979 incident at Three Mile Island drew attention to weaknesses in the capability to obtain and analyze reactor coolant samples in an environment where the reactor core incurs significant damage. As a result, the U.S. Nuclear Regulatory Commission promulgated regulations requiring that reactor coolant analytical capabilities be upgraded so they could function in such an environment. The "upgrades" primarily involved the ability to safely obtain a representative sample within the count rate capabilities of the detection system and to deduce useful information from the analysis. Different designs and techniques were developed for fulfilling these regulatory requirements; however, the constraints in an environment of severe core damage make it very difficult to test the feasibility of specific design features and to determine the type of information that would be most useful to operators. To examine issues associated with post-accident monitoring, the Electric Power Research Institute funded a research project, the scope of which included, among other items, four specific radiological factors associated with routine and post-accident monitoring. The study of these four factors, evaluations of on-line monitoring versus grab sample analysis, count rate reduction factors obtainable by and spectral effects of variable aperture collimation, use of key radionuclides in assessing fuel pin integrity under both normal and abnormal reactor conditions, and possible spectral interferences from fission product releases at elevated core temperatures, provided the substance for this research report. A description of the four individual studies along with results are reported in four separate chapters. Aconclusions chapter is used to summarize the key findings of the research effort.
Download or read book 1996 IEEE Nuclear Science Symposium written by and published by . This book was released on 1997 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expert System for Online Surveillance of Nuclear Reactor Coolant Pumps written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An expert system for online surveillance of nuclear reactor coolant pumps. This system provides a means for early detection of pump or sensor degradation. Degradation is determined through the use of a statistical analysis technique, sequential probability ratio test, applied to information from several sensors which are responsive to differing physical parameters. The results of sequential testing of the data provide the operator with an early warning of possible sensor or pump failure.
