Forschungsreaktoren aktuelle projekte dokumentation deutscher. Thermal hydraulic analysis of the oregon state triga reactor. Single fuel elements of 38mm diameter are supplied for use in standard triga mark i and mark ii reactor core configurations. The objective of the present study is to ensure that all important safety related thermal hydraulic parameters uphold margins far below the safety limits by steady. For unit cell calculation, wims program package is incorporated. This publication covers the historical development and basic characteristics, utilization, fuel conversion and ageing management of triga research reactors. The core is located in a 24 foot deep pool with 71,000 gallons of demineralized water. As the staff of triga facilities retire, there is an urgent need to capture their knowledge. Smaller diameter fuels are used in fuel cluster configurations of four, 16 or 25 fuel rods for conversion of existing reactors to triga core grids and higher power applications. Fir 1 triga mark ii research reactor decommissioning. Oregon state triga reactor radiation center oregon. Triglav can also be used for depletion calculations and core managementplanning.
Typical values are given for the respective systems although each. Power calibration of the triga mark i nuclear research reactor. Mar 03, 2015 in this work, the characterization of the fullpower steady state of the triga mark ii nuclear reactor of the university of pavia is performed by coupling monte carlo mc simulation for neutronics with multiphysics model for thermalhydraulics. Pulsing of nuclear reactor the reactor is brought to criticality and then the transient control rod is forced out. The psbr is a 1 mw triga reactor with pulsing capabilities and a moveable core in a large pool. Particular attention was given to reproduce strictly the geometry and the composition of the reactors in order to improve the accuracy of the simulation results. Characterization of the triga mark ii reactor fullpower. For nuclear materials properties investigation, neutron radiography methods have been developed in the inr. Forms and procedures radiation center oregon state university. Triga is a pooltype reactor that can be installed without a containment building, and is designed for research and testing use by scientific institutions and universities for purposes such as undergraduate and graduate education, private commercial research, nondestructive testing and isotope production the triga reactor uses uranium zirconium hydride uzrh fuel, which has a large.
Reactor characterization reactor model triga mark ii maximum power 1mw thermal steady state pulsing peak power 1200mw pulse width 11ms nuclear fuel uzrh1. Triga fuels lowenriched, longlifetime uranium zirconium hydride uzrh fuel is the fundamental feature of the triga family of reactors that accounts for its widely recognized safety, rugged, dependable performance, economy of operation, and its acceptance worldwide. Nowadays the pavia triga reactor is available for national and international collaboration in various research fields. Nov 19, 2019 known as the triga mark i reactor, it was originally licensed to operate at a power level of 10 kilowatts kw, but was soon upgraded to 250 kilowatts. Design and implementation of a fuzzy controller for a. Characterization of triga rc1 neutron irradiation facilities for. Triglav is a neutron diffusion code for triga reactor core calculations. Group constants for all unit cells are calculated with transport program wimsd askew et al. Results are directly applicable to triga reactor operation and safety analysis. Monte carlo simulation for calculation of kinetic parameters in an accelerator driven subcritical triga reactor m.
The reaktor triga puspati at the malaysian nuclear agency is a 1 mw research reactor. Blotcky reactor facility ajbrf within the omaha va medical center. The triga markii reactor was installed by general atomic san diego, california, u. Triga mark ii nuclear reactor facility mechanical and. The sans instrument is of 8 meter long with a q range of about 0. Reactor pool type 14 mw triga research reactor contained in iaea rrdb as triga ii pitestiss core, iaea code ro0002. Oregon state triga reactor radiation center oregon state. Modulation of reactor power in the pennsylvania state triga reactor pstr as a research tool. The design and testing of a fuzzy rule based controller to regulate the power of a triga mark iii research nuclear reactor are presented. The objective of this experiment is to design and implement an automatic controller for regulating triga reactor power using a stateoftheart unix network compatible controller integrated with a development, test, and monitoring environment based on the mathworks matlabsimuilink operating in a remote unix host computer. Both reactors may be operated separately or at the same time. Ravnik, nuclear safety parameters of mixed triga cores, workshop on reactor physics calculations, 12 february to march 1990, ictp, trieste, proceedings.
The design team for triga, which included edward teller, was led by the physicist freeman dyson. The triga mark iii reactor core was simulated with mcnp6 to deduce the keff, for critical state and after a small insertion of positive reactivity 0. Modulation of reactor power in the pennsylvania state triga. The usgs triga reactor has been in operation since the late 1960s in support of nuclearbased research for the usgs and a number of universities across the nation. Neutron flux variability at the triga mark ii reactor, ljubljana, as a. Triga 14 125mw reactor is used for medical and industrial radioisotopes production 1i, i, 192ir etc. Dec 07, 2015 it offers a measurement on a wide spectrum ranging from 0. The group constants are calculated for every unit cell in dependence of. Author links open overlay panel wanbin tan a b pengcheng long a guangyao sun a jun zou a lijuan hao a. The triga mark ii nuclear research reactor of the pavia university offers different in and outcore neutron irradiation channels, each. Geometry of the program is adjusted to cylindrical core of the triga mark ii reactor. Large exposure rooms allow the flexibility of variable shielding configurations to customize the.
Triga is a pooltype reactor that can be installed without a containment building, and is. User manual describing the operation of the reactor simulator from the users perspective. The kansas state university triga mark ii nuclear reactor facility supports academic and education programs, research, industrial service and outreach. The reactor was built to support the mnrc unique radiography bays which include the two largest neutron radiography bays in the world. The research reactor simulator, developed by jozef stefan institute ijs is a realtime simulation code of a trigatype reactor in real time.
Pdf operation and control of triga nuclear research reactor. The triga mark ii reactor models were constructed using the quick modeling method of supermc. Mcnp5 modeling of the oregon state triga reactor for. Then the energies deposited in simulated ion chambers, above the core are used to determine the dose rate to a person standing on top of the reactor bioshield after a loca. Triga training, research, isotopes, general atomics is a class of nuclear research reactor designed and manufactured by general atomics. The design does not require the current exact parameters of the point kinetic equations of the reactor. By design and construction, triga reactors are failsafe in the sense that the fuel itself is designed to shut down the nuclear reactions if the temperature increases beyond the operation limits. History, development and future of triga research reactors iaea. Every fuel and nonfuel element position in the core is treated as a unit cell see fig. Agreement with monte carlo reasonable on code level, unable to describe local details. History, development and future of triga research reactors. The triga training research and isotope production general atomics mark ii is a research reactor designed and manufactured by general atomics. As the staff of triga facilities retire, there is an urgent need to gather their knowledge.
The ostr is a watercooled, pooltype research reactor that uses uraniumzirconium hydride fuel elements in a circular grid array. Abstractnuclear reactor operation and control is a. The cdrom accompanying this publication includes 22 individual. The centerpiece of the nuclear science center is a 1 megawatt triga testing, research, isotopes, general atomics reactor, an open swimming pooltype research reactor cooled by natural convection providing passive and inherent safety. Doe foreign research reactor snf acceptance program frr snf ap aim of the acceptance program is the nonproliferation, i. It has four neutron beam ports and one beam port is dedicated to a smallangle neutron scattering sans instrument.
Gas triga training, research, isotopes, general atomics reactor is the most widely used nonpower nuclear reactor in the world. It is a pooltype reactor cooled and partly moderated by light water, with the fuel consisting of a uniform mixture of uranium 8%wt, enriched at 20%wt in 235u and zirconium hydride zrh, which. Neutronic analyses have been performed starting from a mc model of the entire reactor system, based on the mcnp5 code, that was already. It could also be rapidly pulsed to power levels of over megawatts mw. Steadystate thermalhydraulic analysis of triga research. To perform more realistic simulations, we had to incorporate in the composition of the leu fuel element the produced poisons in a time period of six years, considering the operation time. The aim of this study is to benchmark the prediction accuracy of comsol multiphysics in performing thermalhydraulic analysis of triga training, research, isotopes, general atomics reactors such as the geological survey triga reactor gstr by comparing its predictions with relap5 a. Neutronics analysis of jsi triga mark ii reactor benchmark experiments with supermc3. Students in the mne nuclear option utilize the reactor in two reactor operation laboratory classes, and as a neutron and gamma source for a radiation. Burnup calculations were performed for triga fuel with two codes. This paper presents the results of neutron flux measurements at two irradiation facilities of the triga mark ii reactor at. The mission of the triga is to support usgs science by providing information on geologic, plant, and animal specimens to advance methods and techniques unique to nuclear reactors. Neutronic analyses have been performed starting from a mc model of the entire reactor system, based on the mcnp5 code, that was already validated in.
Neutron measurement system for triga reactors engineered. Operation of the reactor since that time has averaged 220 days per year, without any long outages. Benchmarking comsol multiphysics singlesubchannel thermal. Thermal hydraulic analysis of the oregon state triga reactor using relap53d. Neutronics analysis of jsi triga mark ii reactor benchmark. The reactor is a typical 250kw triga mark ii lightwater reactor with an annular graphite reflector cooled by natural convection. The side and the top views of the reactor are shown in figures 1 and 2. Ga has installed 66 triga reactors at universities, government and industrial laboratories, and medical centers in 24 countries. A program package for triga reactor calculations an overview of the triglav package, a tool for the computational analysis of triga mark ii reactors based on lattice. Triga mark ii nuclear reactor facility the kansas state university triga mark ii nuclear reactor facility supports academic and education programs, research, industrial service and outreach. Pdf recently a series of test irradiations was performed at the jsi triga mark ii reactor for the fission. Dose distributions in phantoms irradiated in thermal.
Students in the mne nuclear option utilize the reactor in two reactor operation laboratory classes, and as a neutron and gamma source for a radiationdetection course. Triga nuclear reactors gas triga training, research, isotopes, general atomics reactor is the most widely used nonpower nuclear reactor in the world. Known as the triga mark i reactor, it was originally licensed to operate at a power level of 10 kilowatts kw, but was soon upgraded to 250 kilowatts. Neutron flux characterisation of the pavia triga mark ii. Radiation center forms and proceduresformsirradiation information form pdf download standard irradiation request form pdf downloadproceduresprocedures for irradiating a sample in the oregon state triga reactor pdf download. Northstar was selected as the prime contractor to decommission the a. Over years this mapping can change from the theoretical configuration and a requalification of the in pile neutron flux can be required to maintain a safe operation and the expertise in reactor physics the challenge. Penn state breazeale reactor the psbr, which first went critical in 1955, is the nations longest continuously operating university research reactor. The reactor is licensed by the usnrc to operate at a maximum steady state power of 1. Nov 14, 2012 pulsing of nuclear reactor the reactor is brought to criticality and then the transient control rod is forced out. The triga mark ii nuclear research reactor of the pavia university offers different in and outcore neutron irradiation channels, each characterised by different neutron spectra.
More detailed explanation is found in the following references. In this work, the characterization of the fullpower steady state of the triga mark ii nuclear reactor of the university of pavia is performed by coupling monte carlo mc simulation for neutronics with multiphysics model for thermalhydraulics. The neutron beams are used for investigation of materials. Fir 1, a triga mark ii type research reactor, was operated in finland for years 1962 2015. The usgs triga reactor gstr is a lowenriched uraniumfueled, pooltype reactor. The original triga operated until 1997, when it was permanently shut down because of its age. During two 100hour operating periods of the triga mark ii reactor, ljubljana, the flux was measured by means of. Monte carlo simulation for calculation of kinetic parameters. In the finnish nuclear energy act, return of the research reactor fuel to u. Comsol multiphysics has been used to conduct thermalhydraulic analysis in multiple nuclear applications. It is the only research reactor in the department of the interior and the only research reactor within a 350mile radius of denver, colo. Aspects of probabilistic safety assessment for triga research reactor 263 the annular core pulsing reactor acpr is used for transient testing of power reactor fuel specimens.
Gas reactors are used in many diverse applications, including production of radioisotopes for medicine and industry, treatment of. It is the only research reactor of its type in the department of the interior and the only research reactor within a. Instead, from a qualitative analysis of the actions taken by the operators during the reactors operation, a set of control rules is derived. The reactor was commissioned and starts the continuous operation from 1980, the reactor was fully converted from heu to leu in 2006 and refurbished in 2009 and planned operational life is estimated till 2030. Neutronics analysis of triga mark ii research reactor sciencedirect. Pin cell model for waterfilled region or graphite reflector region. Nuclide inventory of fir 1 triga research reactor fuel sciencedirect.
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