Nuclear regulatory commission nrc received and is considering approval of an application filed by the dow chemical company tdcc, the licensee on november 22, 2019. Sensitivity analysis of the triga iprr1 reactor models using. Office of nuclear reactor regulation mail stop 12 g washington, dc 20555 reference. A preliminary version of this paper was presented at the 17th international. Fir 1, a triga mark ii type research reactor, was operated in finland for. Power calibration of the triga mark i nuclear research reactor. The laboratory of applied nuclear energy lena is an interdepartmental research centre of the university of pavia which operate, among other facilities, a 250 kw triga mark ii research nuclear reactor. This publication summarizes the past and present of triga research reactors, and addresses potential challenges in the near future. This graphical user interface makes the program very easy to use. Former triga reactor gains ans national historic landmark.
Wiggins, deputy office director office of nuclear reactor regulation attachment. September 1216, 2005 trtigorr joint meeting gaithersburg, md 1 triga the eneacasaccia reactor research reactors current status enea triga rc1 c. Invap, an argentine company founded more than three decades ago, is today recognized as one of the leaders within the research reactor industry. 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 design team for triga, which included edward teller, was led by the physicist freeman dyson. 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. Operation of the reactor since that time has averaged 220 days per year, without any long outages. The netl reactor, designed by general atomics, is a triga mark ii nuclear research reactor. The kansas state university triga mark ii nuclear reactor facility supports academic and education programs, research, industrial service and outreach. You should understand the unique operational characteristics of the triga fuel and realize the differences between triga fuels and other, more traditional reactor fuels objective of training this module describes the general design, characteristics and parameters of triga reactors and fuel. Gas triga training, research, isotopes, general atomics reactor is the most widely used nonpower nuclear reactor in the world. Large exposure rooms allow the flexibility of variable shielding configurations to customize the neutrongamma ratio. Pdf performance of a new smallangle neutron scattering.
History, development and future of triga research reactors iaea. The triga mark ii reactor installed at the university of pavia is licensed for. Looking down into the pool of the original 10kw triga mark i reactor at san. Moreover, the 3d visualization tools for presentation of the reactor parameters have already. Generations of npre students were able to enjoy the unique experience of operating and experimenting with our triga reactor. Fir 1 triga type research reactor fir1 triga mark ii reactor is. Characterization of the triga mark ii reactor fullpower. Aspects of probabilistic safety assessment for triga research reactor 265 it can be seen in table 2 that not all the identified sequences are leading to the same core damage degree of triga reactor. Jul 27, 2016 video of a pulse from 50w to 1484mw peak temperature 419 c 3. The other section is an open evaluating the core damage frequency of a triga research reactor using risk. Modulation of reactor power in the pennsylvania state triga. Operating status of the reactors all the three reactors are in operation. Thousands of scientific articles refer to research performed with triga reactors, many. Puspati triga reactor rtp is a 1 mw thermal, pooltype research reactor fueled with uraniumzirconium hydride uzrh1.
Triga mark ii research reactor at jozef stefan institute has been operating. 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. Oregon state triga reactor oregon state university. It is another tanktype watercooled system, but its fuel differs from that employed by the platefuel research reactors. The reactor behaviour after the loss of flow was analysed as well as the changes in the coolant and fuel temperatures.
Fir 1 triga mark ii research reactor decommissioning. Fir s triga activity inventories for decommissioning planning. General atomics ga, the supplier of triga research reactors. As the staff of triga facilities retire, there is an urgent need to gather their knowledge. Triga mark ii nuclear reactor facility mechanical and. Results are directly applicable to triga reactor operation and safety analysis.
The reactor is licensed by the usnrc to operate at a maximum steady state power of 1. This irradiation cell is a large space where samples may be placed for activation by moving the reactor bridge to a. Effect of graphite reflector on the neutronic parameters 661 2. Modulation of reactor power in the pennsylvania state triga reactor pstr as a research tool. Reactor pool type 14 mw triga research reactor contained in iaea rrdb as triga ii pitestiss core, iaea code ro0002. Research reactor triga mark ii with hot cell slovenian. History, development and future of triga research reactors. Gradually, flip research reactors will convert to low enriched uranium leu fuel due to worldwide nuclear proliferation concerns. It could also be rapidly pulsed to power levels of over megawatts mw. The triga training research and isotope production general atomics mark ii is a research reactor designed and manufactured by general atomics. Pdf this paper presents the results and methodology used to calibrate the thermal power of the triga mark i iprr1 research reactor at the nuclear. The original triga operated until 1997, when it was permanently shut down because of its age.
Hse revokes the nuclear site licence for icis triga reactor. Triga puspati reactor known as rtp is the only nuclear research reactor in malaysia. Design of a low enrichment, enhanced fast flux core for the mit research reactor, ellis 2008 ph. The most important responsibility of the ostr is to support oregon state universitys academic programs. The training, research, and isotopeproduction reactors general atomic triga system is a popular variety of research reactor. Triglavw a windows computer program package with graphical users interface for triga reactor core management calculations tomaz zagar1,2, bojan zefran2, slavko slavic2, luka snoj2 and.
User manual describing the operation of the reactor. In the process of verification and validation of code modelling, the sensitivity analysis including systematic variations in code input variables must be used to help identifying the relevant parameters necessary for a determined type of analysis. Triglavw a windows computer program package with graphical users interface for triga reactor core management calculations tomaz zagar1,2, bojan zefran2, slavko slavic2, luka snoj2 and matjaz ravnik2 1 gen energija, d. Cases of core coolant flow blockage transient have been simulated and analysed for the triga iprr1 research reactor using the relap5mod3. 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. Video of a pulse from 50w to 1484mw peak temperature 419 c 3. The triga reactor uses uzrh fuel, which has a prompt negative fuel temperature coefficient of reactivity, meaning that as.
Evaluating the core damage frequency of a triga research. The netl reactor has incore irradiation facilities and five beam ports. International atomic energy agency, history, development and future of triga research reactors, technical reports series no. The highest contribution about 100 % is due to d1 state, failure of 725 fuel elements in water. The triga mark ii reactor in the viennese prater is part of the atominstitut. The institute was founded in 1958 as an interuniversity institute for all austrian universities and started operation in 1962, when the triga mark ii research reactor.
Effect of graphite reflector on the neutronic parameters of. In addition we used iaea safety standards 5, 6 and 7. The jsi triga reactor was the first reactor in the world on where those methods were applied and tested. Ici chemicals and polymers ltd ici have operated a research reactor triga at billingham, cleveland. Oregon state university triga reactor ostr docket no. This paper proposes an operation and control feature of triga markii research reactor. Utilization and application of the slovenian triga reactor. Smaller diameter fuels are used in fuel cluster configurations of four, 16 or 25 fuel rods for conversion of existing reactors to triga. Triga fuel is used in triga training, research, isotopes, general atomics reactors. Global threat reduction initiative strategic plan january 2009 pdf. Institute for nuclear research is the owner of the largest family triga research reactor, triga14 mw research reactor. Reflector effect on the effective multiplication factor k eff the effective multiplication factor k eff is the most neutronic parameter with respect to the control and safety of reactor.
Performance of a new smallangle neutron scattering instrument at the malaysian triga reactor. Reactor characterization reactor model triga mark ii maximum power 1mw thermal steady state pulsing peak power 1200mw pulse width 11ms nuclear fuel uzrh1. Trigrav is an updated program package for reactor calculations of triga reactor cores with the module triglavw running under microsoft windows operating system with new friendly graphical user interface. Ga has installed 66 triga reactors at universities, government and industrial laboratories, and medical centers in 24 countries. Pulsing of nuclear reactor the reactor is brought to criticality and then the transient control rod is forced out. The reactor is a typical 250kw triga mark ii lightwater reactor with an annular graphite reflector cooled by natural convection. The reactor was licensed under the nuclear installations act 1965 as amended, nia65. In the finnish nuclear energy act, return of the research reactor fuel to u. It is a pooltype reactor cooled and partly moderated.
Developing fuel management capabilities based on coupled monte carlo depletion in support of the mit research reactor conversion, romano, 2009 estimate of radiation release from mit reactor. Doe foreign research reactor snf acceptance program frr snf ap aim of the acceptance program is the nonproliferation, i. Triga is a class of nuclear research reactor designed and manufactured by general atomics. Triglavw window used to prepare and edit triglav input files. Nuclide inventory of fir 1 triga research reactor fuel sciencedirect. 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. One of the sections of the pool contains an experimental stall into which beam tubes and other experimental facilities converge.
Jul 10, 2017 hse revokes the nuclear site licence for icis triga reactor and ends the licensees period of responsibility. There is an installed base of over sixtyfive facilities in twentyfour countries on five continents. Simulation of a triga reactor core blockage using relap5 code. Pdf power calibration of the triga mark i nuclear research.
Oregon state university triga reactor physical security plan, as revised. 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. Triga reactors are the most widely used research reactor in the world. Oregon state university triga reactor, revision of. The reactor core is immersed in either section of a twosection concrete pool filled with water. The side and the top views of the reactor are shown in figures 1 and 2. The purpose of this presentation is physical explanation of most important nuclear safety parameters. Paunoiu institute for nuclear research, 1 campului street, 115400, mioveni romania email. This paper presents comparison calculations for fir 1 reactor fuel nuclide. Power calibration of the triga mark i nuclear research reactor this paper presents the results and methodology used to calibrate the thermal power of the triga mark i iprr1 research reactor at the nuclear technology development centre cdtn, in belo horizonte, brazil.
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. Special purpose triga reactors have also been built. Source term atmospheric release and core inventory. 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. Calculation of power density with mcnp in triga reactor. Etcheverry hall is a building on the uc berkeley campus that houses the departments of mechanical, industrial, and nuclear engineering of the uc berkeley college of engineering. Decommissioning plan for research reactors in indonesia. Nuclide inventory of fir 1 triga research reactor fuel. Sep 14, 2015 the advanced illinois triga reactor was a real asset to our educational and research programs, said jim stubbins, npre department head and willett professor in the college of engineering. The application seeks nrc approval of the indirect transfer of control of tdccs interests in the dow triga. Single fuel elements of 38mm diameter are supplied for use in standard triga mark i and mark ii reactor core configurations. The core consists of cylindrical fuel elements reflected with graphite. This reactor was conceived, built, and operated at the general atomic.
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. The reactor starts its operation in 1982 and reached its first criticality on 28 june 1982. The research reactor simulator, developed by jozef stefan institute ijs is a realtime simulation code of a triga type reactor in real time. The transients are related to partial and to total obstruction of the core coolant channels. Triga, a new kind of inherently safe training, research, and isotopeproduction nuclear research reactor, is discussed. The institute was founded in 1958 as an interuniversity institute for all austrian universities and started operation in 1962, when the triga mark ii research reactor of the institute was officially opened. September 10, 2008 100 radiation center state university. This publication covers the historical development and basic characteristics, utilization, fuel conversion and ageing management of triga research reactors. You should understand those additional systems required for higher operating powers or specific facility needs.
However, they have different operating experiences, since they were built in different periods. In a lifetime spanning 38 years, the former triga reactor. Fir 1, a triga mark ii type research reactor, was operated in finland for years 19622015 and will be decommissioned during the following few years. The triga markii reactor was installed by general atomic san diego, california, u. Trigrav is an updated program package for reactor calculations of triga reactor cores with the module triglavw running under microsoft windows operating system with new friendly graphical. Pdf triga, a new kind of inherently safe training, research, and isotopeproduction nuclear research reactor, is discussed. Typical values are given for the respective systems although each. This license is effective as of the date of issuance and shall expire 20 years from its date of issuance. Former triga reactor gains ans national historic landmark status. You should understand the support, instrumentation and control systems which are generally required for all triga research reactors. Jacobson is managing editor of atomics and editor of business. Former triga reactor, university of illinois at urbanachampaign. Nuclear reactor operation and control is a sophisticated system involving modern equipments and techniques.
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