nuclear reactor Articles
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The renewal of licensing system for nuclear reactors in Indonesia
This paper describes the renewal of the licensing system for nuclear reactors in Indonesia stipulated in the new legislation and regulations. The new Act, Number 10 Year 1997 on Nuclear Energy, provides for licensing by the regulatory body of personnel and installations. The construction and operation of nuclear reactors and other nuclear installations, as well as the decommissioning of nuclear ...
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Embedding nuclear physics rules and fuel chemistry limits in control algorithms for a fuel-efficient nuclear reactor
In a nuclear reactor, the energy which is stored in the fuel is proportional to the amount of fissile material. The consumption of that amount, after a set burn-up, should and must result in delivering a set energy, barring leakages (losses). The loss of energy due to an inefficient control algorithm, after a set burn-up, is a problem that no one has yet addressed. Nuclear fuel chemists and ...
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The effect of pulse reactivity for stochastic neutron point kinetic equation in nuclear reactor dynamics
In this present analysis, the numerical simulation methods are applied to calculate the solution for Stochastic Neutron Point Kinetic Equations (SNPKE) with pulse reactivity in dynamical system of a nuclear reactor. The resulting systems of differential equations are solved for each time step–size. Using experimental data, the methods are investigated with pulse reactivity. The computational ...
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Identification of a research nuclear reactor using computational intelligence techniques
In the field of nuclear engineering, the development of methods to identify the non-linear dynamic behaviour of nuclear reactors is an important area of research. In this paper, the design and performance of a multi-input multi-output Takagi?Sugeno (TS) neuro-fuzzy network are presented. The aim of this network is to identify the temporal behaviour of the power, the fuel temperature and the core ...
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The solution of coupled fractional neutron diffusion equations with delayed neutrons
The distribution of the neutron population in a nuclear reactor is described by using transport equations. One possible solution of the fractional neutron transport equation is given by the fractional neutron diffusion equation. This paper presents the application of an analytical approximation method for the solution of one group of fractional neutron diffusion equations with one group of ...
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Thermal hydraulic analysis of small nuclear reactor core by using comparative approach of THEATRe and Relap5 code
Thermal analysis of a nuclear reactor is very important in determining its design. It can produce desired thermal power without exceeding limitations on core components, which could lead to fuel failure and radioactive release into the environment. In this paper, thermal hydraulic studies of a small nuclear reactor core have been carried out by using two well–known thermal hydraulic codes, Relap5 ...
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The Luus-Jaakola algorithm applied to a nuclear reactor core design optimisation
The Luus-Jaakola (LJ) algorithm is a random search optimisation method that has been successfully employed mainly in chemical engineering problems. In this paper, we apply this algorithm to an optimisation problem solved previously with genetic algorithms, particle swarm optimisation and Metropolis algorithms. This problem consists of adjusting several reactor cell parameters, such as dimensions, ...
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Solution of non–linear neutron point kinetics equations with feedback reactivity in nuclear reactor dynamics
In this paper, an efficient numerical procedure for calculating the solution of the non–linear neutron point kinetics equations in the field of nuclear reactor dynamics is presented. The explicit finite difference method is applied to solve the non–linear neutron point kinetics equations with temperature feedback reactivity. The numerical solution obtained by explicit finite difference scheme is ...
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Numerical solution for stochastic point–kinetics equations with sinusoidal reactivity in dynamical system of nuclear reactor
In this present analysis, the numerical simulation methods are applied to calculate the solution for stochastic point–kinetic equations with sinusoidal reactivity in dynamical system of nuclear reactor. The resulting system of differential equations is solved for each time step–size. Using experimental data, the methods are investigated over initial conditions and with sinusoidal ...
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Confidentiality clauses and nuclear activity in the Argentine Republic: an account of reports issued based on unknown clauses
The duty of the Argentine authorities in the case of entering into an agreement for the supply of nuclear materials balances the social relevance of the exercise of the rights to confidentiality and, on the other hand, the increasing need for transparency. Keywords: Argentina, confidentiality, duty, secret, transparency, nuclear materials, nuclear power, nuclear energy, nuclear reactors, research ...
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Study of confinements in the particle swarm optimisation for application to the nuclear reactor reload problem
Particle Swarm Optimisation (PSO) is a metaheuristic technique based on the social aspects of intelligence. Some PSO models have been developed for combinatorial optimisation, although none of them presented satisfactory results to optimise the combinatorial problem of the Nuclear Reactor Reload Problem (NRRP). The Particle Swarm Optimisation with Random Keys (PSORK) model is a variant of the PSO ...
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A new hardwire circuit for metering reactivity
Sub-criticality, criticality, and reactivity are the terms which are not annunciated in Indian PHWRs (Pressurised Heavy Water Reactors) and are thus not very clear to the reactor operators. These parameters are prime movers defining nuclear reactor and should be annunciated in control room by simple means to aid operator to view reactivity excursions while in power operation or during shutdown ...
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Post-September 11 responses in US regulatory practice affecting the export and import of radioactive materials and related equipment
This paper discusses certain significant changes in the US laws and regulations in the post-September 11 era regarding the export and import of nuclear and other radioactive materials, as well as related equipment. These changes demonstrate the US Government's growing vigilance concerning the movement and end-user of such materials and equipment in light of the intensified threat of their ...
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Fast reactor knowledge inventory
The International Atomic Energy Agency (IAEA) took an initiative to coordinate the preservation of knowledge in the area of Fast Reactors (FRs). In the framework of this initiative, the IAEA intends to create an international inventory of information on FRs through an integrated Fast Reactor Knowledge Organisation System (FR-KOS) established and maintained by the IAEA. FR-KOS is based on the ...
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Coupling the nickel–iodine–sulphur cycle with a nuclear reactor
Nuclear hydrogen production is a technically feasible and economically viable option for addressing future energy needs. Several projects have been started on the co–generation of hydrogen and electricity from nuclear energy. In this report, the nickel sulphur iodine (NIS) cycle, a thermochemical water splitting cycle originally developed in ENEA for solar hydrogen production, was studied to be ...
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San Onofre nuclear reactor shut down due to leak
Tuesday afternoon, January 31, 2012, nuclear reactor at San Onofre nuclear power plant shut down due to a leak. Of course, the plant operators say, "The potential leak poses no imminent danger to the public or plant workers," according to a Southern California Edison statement. "There has been no release to the atmosphere." Don't they always say that? According to the SanClementPatch The leak ...
By MapCruzin
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Quick Mapping Evaluator - application for ontology mapping evaluation: a case study on nuclear reactor domain
A comparative study of different string similarity metrics for ontology mapping using Quick Mapping Evaluator (QME) has been carried out. A Java Swing based GUI application, QME, has been developed. This QME is equipped with different algorithms like String Equality, Longest Common Subsequence and Levenshtein Distance for evaluation of the ontology matching at different thresholds in terms of ...
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WWER RPV embrittlement: start of life toughness
It is well known that neutron irradiation affects the properties of reactor pressure vessel material. The methodologies to assess the embrittlement of LWR (PWR, BWR and WWER types) are all based on the shift induced by irradiation of a reference transition temperature. This shift is obviously defined as the transition temperature (RTNDT or Tk) for the irradiated material minus the transition ...
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Application of modified decomposition method and variational iteration method for the solution of the one group neutron diffusion equation with fixed source
In this paper, He's variational iteration method and modified decomposition method are applied to obtain the analytical approximate solution of the neutron diffusion equation with fixed source. The main properties of these methods lie in their flexibility and ability to solve linear as well as non–linear equations accurately and conveniently. The explicit solution of the neutron diffusion ...
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Experience in the utilisation of a university reactor in education and research
During the 1980s and 1990s, the utility of university reactors in education and research became questionable. This result may be attributed to several factors, including the decline of programmatic funding for such facilities, the lack of technical personnel who are able to utilise these reactors, and the general apathy towards nuclear engineering education. Recently, nuclear power has reemerged ...
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