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Study on Hybrid Harmonics and Linearization Perturbation Method and the Benchmark Problem for Loading Pattern Search

Author: FuXueFeng
Tutor: ZhangShaoZuoï¼›ZhaoRongAn
School: Shanghai Jiaotong University
Course: Nuclear Energy Science and Engineering
Keywords: Harmonic Linear perturbation Combination method Source extrapolation Basis title
CLC: TL329
Type: Master's thesis
Year: 2008
Downloads: 12
Quote: 2
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Abstract


Refueling optimization process requires a lot of core refueling physical parameter calculation program , and program evaluation is the most time-consuming part of the optimization process . Therefore , to shorten the time evaluation of the program is to speed up the optimization process of the effective means. 2006 , Lu Dong , etc. made ??with low harmonic wavelet function and perturbation calculation basis functions combined with the fast reactor core physics parameters. Numerical results show that this method has a good application prospect , but there are still many problems to be solved . Firstly, studied how to produce better basis functions , creatively put forward the linear perturbation method produces disturbances basis function , to overcome the previous experience of direct substitution inherent limitations. This method has a more solid theoretical basis , universal better advantage of higher precision . The method for determining the basis functions , the papers and on the method of determining the base function coefficients are explored relatively large number of numerical experiments table Ming Jia Galerkin orthogonal projection method is robust feasible. Paper presents the improved convergence acceleration power source extrapolation method to seek small-scale principal eigenvalue matrix , replacing the original QZ algorithm to overcome its shortcomings solving may not converge , but speed is also increased slightly. Proposed for solving the higher order harmonics source added extrapolation formula , the solution to further improve the speed of higher order harmonics . In the process of accession to burn and stick power calculation functions make the program more potential for engineering applications , but also further evidence of the harmonic combination with the linear perturbation method HHLP precision and universality. Finally, given the current international is no universally accepted and published benchmark refueling optimization problem , the use of HHLP evaluate the advantages of speed , the use of each enumeration method produced poor evaluation of all programs , designed to balance the circulation refueling benchmark questions, to evaluate the pros and cons of various optimization methods ; explores the outer core parameters of the new material impact on the number of analyzed components Kinf peak core power distribution and relationships , and thus to optimize the method provides useful guidance .

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CLC: > Industrial Technology > Nuclear technology > Engineering of Nuclear Reactors > Reactor physics and design, calculation > Reactor theory calculations
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