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. The usgs triga reactor gstr is a lowenriched uraniumfueled, pooltype reactor. Thermal hydraulic analysis of the oregon state triga reactor. The psbr is a 1 mw triga reactor with pulsing capabilities and a moveable core in a large pool.
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. Neutronics analysis of triga mark ii research reactor sciencedirect. Agreement with monte carlo reasonable on code level, unable to describe local details. For unit cell calculation, wims program package is incorporated. Large exposure rooms allow the flexibility of variable shielding configurations to customize the. Design and implementation of a fuzzy controller for a. 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. Nuclide inventory of fir 1 triga research reactor fuel sciencedirect.
Comsol multiphysics has been used to conduct thermalhydraulic analysis in multiple nuclear applications. During two 100hour operating periods of the triga mark ii reactor, ljubljana, the flux was measured by means of. 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. Steadystate thermalhydraulic analysis of triga research. Dose distributions in phantoms irradiated in thermal. Triga training, research, isotopes, general atomics is a class of nuclear research reactor designed and manufactured by general atomics. 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. Oregon state triga reactor radiation center oregon. The core is located in a 24 foot deep pool with 71,000 gallons of demineralized water. Results are directly applicable to triga reactor operation and safety analysis. The design does not require the current exact parameters of the point kinetic equations of the reactor.
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. 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. 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. Nowadays the pavia triga reactor is available for national and international collaboration in various research fields.
Triga nuclear reactors gas triga training, research, isotopes, general atomics reactor is the most widely used nonpower nuclear reactor in the world. The side and the top views of the reactor are shown in figures 1 and 2. Fir 1 triga mark ii research reactor decommissioning. Characterization of triga rc1 neutron irradiation facilities for. Single fuel elements of 38mm diameter are supplied for use in standard triga mark i and mark ii reactor core configurations.
Author links open overlay panel wanbin tan a b pengcheng long a guangyao sun a jun zou a lijuan hao a. 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. Pulsing of nuclear reactor the reactor is brought to criticality and then the transient control rod is forced out. This publication covers the historical development and basic characteristics, utilization, fuel conversion and ageing management of triga research reactors. 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. Reactor pool type 14 mw triga research reactor contained in iaea rrdb as triga ii pitestiss core, iaea code ro0002. Ravnik, nuclear safety parameters of mixed triga cores, workshop on reactor physics calculations, 12 february to march 1990, ictp, trieste, proceedings. Pdf operation and control of triga nuclear research reactor. Mcnp5 modeling of the oregon state triga reactor for. Dec 07, 2015 it offers a measurement on a wide spectrum ranging from 0. 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. The reactor is a typical 250kw triga mark ii lightwater reactor with an annular graphite reflector cooled by natural convection. Northstar was selected as the prime contractor to decommission the a. In the finnish nuclear energy act, return of the research reactor fuel to u.
Thermal hydraulic analysis of the oregon state triga reactor using relap53d. Triglav is a neutron diffusion code for triga reactor core calculations. 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. Triga 14 125mw reactor is used for medical and industrial radioisotopes production 1i, i, 192ir etc. Modulation of reactor power in the pennsylvania state triga. The sans instrument is of 8 meter long with a q range of about 0. Triglav can also be used for depletion calculations and core managementplanning. Forschungsreaktoren aktuelle projekte dokumentation deutscher.
Operation of the reactor since that time has averaged 220 days per year, without any long outages. Neutronics analysis of jsi triga mark ii reactor benchmark. The coolodn2 and paret computer codes were used for a steadystate thermal hydraulic and safety analysis of the 3 mw triga markii research reactor located at atomic energy research establishment aere, savar, dhaka, bangladesh. The original triga operated until 1997, when it was permanently shut down because of its age. Both reactors may be operated separately or at the same time. It has four neutron beam ports and one beam port is dedicated to a smallangle neutron scattering sans instrument. 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. Typical values are given for the respective systems although each. History, development and future of triga research reactors. 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. It could also be rapidly pulsed to power levels of over megawatts mw. Pdf using triga markii research reactor for irradiation with. 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.
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. Characterization of the triga mark ii reactor fullpower. However, those triga reactors that are designed to be operated above 3 mw also use a triga fuel that is specifically designed for those higher power outputs 3 to 14 mw. 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.
Abstractnuclear reactor operation and control is a. Oregon state triga reactor radiation center oregon state. Instead, from a qualitative analysis of the actions taken by the operators during the reactors operation, a set of control rules is derived. Pin cell model for waterfilled region or graphite reflector region. Geometry of the program is adjusted to cylindrical core of the triga mark ii reactor. Neutron flux mapping is key for research reactors operators.
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. 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. Monte carlo simulation for calculation of kinetic parameters. Triga reactor 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. The cdrom accompanying this publication includes 22 individual. Neutron flux variability at the triga mark ii reactor, ljubljana, as a. The triga markii reactor was installed by general atomic san diego, california, u. The design team for triga, which included edward teller, was led by the physicist freeman dyson. Group constants for all unit cells are calculated with transport program wimsd askew et al. More detailed explanation is found in the following references. The reactor was built to support the mnrc unique radiography bays which include the two largest neutron radiography bays in the world. Fir 1, a triga mark ii type research reactor, was operated in finland for years 1962 2015.
User manual describing the operation of the reactor simulator from the users perspective. Doe foreign research reactor snf acceptance program frr snf ap aim of the acceptance program is the nonproliferation, i. 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. As the staff of triga facilities retire, there is an urgent need to capture their knowledge. It is the only research reactor of its type in the department of the interior and the only research reactor within a.
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. Reactor characterization reactor model triga mark ii maximum power 1mw thermal steady state pulsing peak power 1200mw pulse width 11ms nuclear fuel uzrh1. It is the only research reactor in the department of the interior and the only research reactor within a 350mile radius of denver, colo. It is the only research reactor of its type in the department of the interior and the only research reactor within a 350mile radius of denver, colo.
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. 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. Ga has installed 66 triga reactors at universities, government and industrial laboratories, and medical centers in 24 countries. 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. Neutronic analyses have been performed starting from a mc model of the entire reactor system, based on the mcnp5 code, that was already. Every fuel and nonfuel element position in the core is treated as a unit cell see fig. The kansas state university triga mark ii nuclear reactor facility supports academic and education programs, research, industrial service and outreach. Gas triga training, research, isotopes, general atomics reactor is the most widely used nonpower nuclear reactor in the world. Benchmarking comsol multiphysics singlesubchannel thermal. Triga is a pooltype reactor that can be installed without a containment building, and is. The triga mark ii nuclear research reactor of the pavia university offers different in and outcore neutron irradiation channels, each. The design and testing of a fuzzy rule based controller to regulate the power of a triga mark iii research nuclear reactor are presented. Forms and procedures radiation center oregon state university. The triga mark ii reactor models were constructed using the quick modeling method of supermc.
Blotcky reactor facility ajbrf within the omaha va medical center. The reaktor triga puspati at the malaysian nuclear agency is a 1 mw research reactor. The neutron beams are used for investigation of materials. Nov 14, 2012 pulsing of nuclear reactor the reactor is brought to criticality and then the transient control rod is forced out. For nuclear materials properties investigation, neutron radiography methods have been developed in the inr. The research reactor simulator, developed by jozef stefan institute ijs is a realtime simulation code of a trigatype reactor in real time.
Triga mark ii nuclear reactor facility mechanical and. The ostr is a watercooled, pooltype research reactor that uses uraniumzirconium hydride fuel elements in a circular grid array. Neutronics analysis of jsi triga mark ii reactor benchmark experiments with supermc3. 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. Modulation of reactor power in the pennsylvania state triga reactor pstr as a research tool. Burnup calculations were performed for triga fuel with two codes. The group constants are calculated for every unit cell in dependence of.
Power calibration of the triga mark i nuclear research reactor. 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. Pdf recently a series of test irradiations was performed at the jsi triga mark ii reactor for the fission. Neutron measurement system for triga reactors engineered. This paper presents the results of neutron flux measurements at two irradiation facilities of the triga mark ii reactor at. 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. 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. Forms and procedures oregon state university radiation.
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. 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. 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. Gas reactors are used in many diverse applications, including production of radioisotopes for medicine and industry, treatment of. History, development and future of triga research reactors iaea.
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