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Sunday, August 16, 2020 | History

3 edition of Monte Carlo superposition calculations of resonance integrals in a reactor cell. found in the catalog.

Monte Carlo superposition calculations of resonance integrals in a reactor cell.

Peter Kirkegaard

Monte Carlo superposition calculations of resonance integrals in a reactor cell.

by Peter Kirkegaard

  • 50 Want to read
  • 26 Currently reading

Published by Danish Atomic Energy Commission, Research Establishment, Reactor Physics Dept. in Risö [Denmark] .
Written in English

    Subjects:
  • Nuclear reactors -- Computer programs.,
  • Monte Carlo method.

  • Edition Notes

    SeriesRisö-M-1257, Risø-M ;, 1257.
    Classifications
    LC ClassificationsQC770 .D42 no. 1257
    The Physical Object
    Pagination52 p.
    Number of Pages52
    ID Numbers
    Open LibraryOL4830215M
    ISBN 108755000010
    LC Control Number75566333

    Coupled Electron-Ion Monte Carlo Calculations of Dense Metallic Hydrogen Carlo Pierleoni,1 David M. Ceperley,2 and Markus Holzmann3 1INFM and Department of Physics, Universita` of L’ Aquila,Via Vetoio, I L’Aquila, Italy 2Department of Physics, NCSA, University of Illinois at Urbana-Champaign, Urbana, Illinois , USA 3LPTL, UMR of CNRS, Universite´ Pierre et Marie Curie. KM is the selfshielding of the main resonance, and is the relative contribution of the main resonance to the total measured quantity D. K# and PJJwere calculated with the code TRIX-1 by using effective resonance integrals for infinite slabs and a calculated spectrum shape. £ is difficult to calculate,and it was determined experimentally from.

    J. C. Wagner, E. D. Blakeman, and D. E. Peplow, “Forward-weighted CADIS method for variance reduction of monte carlo calculations of distributions and multiple localized quantities,” in Proceedings of the International Conference on Mathematics, Computational Methods & Reactor Physics (M&C '09), Saratoga Springs, NY, USA, May Monte Carlo Methods • When we simulate a process on a computer that involves random chance, that is known as a Monte Carlo simulation • One simulation run: particular choices for .

    COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. A common practice is to choose either a deterministic method such as the convolution∕superposition (CS) method for speed or a Monte Carlo (MC) method for accuracy. The goal of this work is to boost the performance of a hybrid Monte Carlo convolution∕superposition (MCCS) method by devising a graphics processing unit (GPU) implementation so.


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Monte Carlo superposition calculations of resonance integrals in a reactor cell by Peter Kirkegaard Download PDF EPUB FB2

Monte Carlo Super position Calculations of Resonance Integrals in a Reactor Cell by Peter Kirkegaard 52 pages + 0 tables + 3 illustrations Abstract A description is given of a computer program, AEK P MCSUP, which calculates the resonance integral for a single resonance in a square reactor lattice cell, containing a cylindricnl fuel zone sur­.

Monte Carlo superposition calculations of resonance integrals in a reactor cell By P. Kirkegaard Download PDF (1 MB)Author: P. Kirkegaard. @article{osti_, title = {Monte Carlo narrow resonance calculational techniques for treating double-heterogeneity effects}, author = {Gelbard, E.M.

and Chen, I.J.}, abstractNote = {Reliable methods already exist for computing resonance intergrals (RIs) in regular lattices. But lattice structures always contain irregularities; e.g., in liquid-metal fast breeder reactor hexagonal steel.

In both a water–lung–water phantom and a two lung‐block phantom, SMC dose distributions are more consistent with Monte Carlo generated dose distributions than are superposition dose distributions, especially for small fields and high energies—for an 18‐MV, 5×5‐cm 2 beam, the central axis dose discrepancy from Monte Carlo is reduced Cited by: models.

Both Monte Carlo calculations were performed for the same geometry. The nu­ clear data used is JENDL-3(8). Temperatures of fuel and coolant nearly correspond to those at the full power stage. Monte Carlo Calculation Monte Carlo calculations were. Monte Carlo Calculations.

• After a particle emerges from source or collision, or if the particle is entering a new cell:. – Randomly sample the free-flight distance to the next interaction.

– If distance-to-interaction. Total Monte Carlo has become a standard approach for direct propagation of Nuclear Data uncertainty in reactor physics calculations.

Coupled neutron and nuclide fields Generalized Perturbation. The Reactor Monte Carlo code (RMC) is employed in stochastic approach for the neutronic analysis in the plate type research reactor.

The goal of this report is to examine the capability and validity of the model built using RMC and compare the results with a well-known Monte Carlo. Monte Carlo Methods 1 Bryan Webber Monte Carlo Calculations of NLO QCD Two separate divergent integrals: Must combine before numerical integration.

Jet definition could be arbitrarily complicated. How to combine without knowing. Two solutions: phase space slicing and subtraction method. BOOK REVIEW Handbook of Nuclear Reactor Calculations, Vols I-III, pp.

carried out using some form of transport theory. Thus weandrespectively. RONEN, Ed. CRC Press, are introduced to the unit cell concept and the integral and West Palm Beach, Florida (). Besides the improved deterministic transport approximations (e.g., S N or P L methods), promising developments were also reported recently in the field of Monte Carlo reactor kinetics calculations.

The Monte Carlo method can be used successfully to calculate the average cross sections of reactor cells, but difficulties arise when it is used to calculate the diffusion coefficients. The present article suggests a new algorithm for calculating these coefficients. The algorithm is based on successive use of the mean-square path length method.

This contrasts with deterministic methods in which each segment is given equal importance, and the time taken scales with the number of segments. Thus, the Monte Carlo superposition provides a simple, accurate and efficient method for complex radiotherapy dose calculations.

Monte Carlo methods are desirable for solving the neutron transport equation required in reactor analysis because of the inherent accuracy of the method, but the Computational Solid Geometry (CSG) representation of the physical geometry makes it difficult to accurately and efficiently perform multiphysics reactor analyses with other.

Principles of Monte Carlo Basic idea of Monte Carlo method is to calculate the travelling distance of each neutron. We need to propagate the neutron trajectory in the reactor like it really behaves (the best way is 'to think like a neutron').

The probability of a first collision for particle between l. A two-dimensional hexagonal cell of a heavy-water moderated reactor was analysed by them using Monte-Carlo, Pa and J method.

The cell consisted of an annular fuel ring immersed in moderator. All calculations were per- formed in three neutron energy groups. Single-cell calculations The single-cell model is sufficient for calculating power-related parameters in loop fuel elements and samples monte carlo calculations applied to nru reactor and radiation physics analyses t.s.

nguyen and g.b. wilkin Outer driver ring Driver rod Loop Inner driver ring Cell boundary D 2 O moderator H O coolant. However, when these virtual behaviors are integrated over the whole volume of the unit cell, they resemble the overall behavior of the neutrons when the heterogeneous neutron cross sections are used in the Monte Carlo calculation.

Surprisingly, a similar idea is seen in the delta tracking method in Monte Carlo described by (Leppänen, ). W decreases the effective resonance integral by 18 to 7 percent over a S/M range of 0.

16 to cm2/g relative to calculations which ignore resonance overlap. Spatial self-shielding in a complex geometric cell is evaluated through comparison of Monte Carlo calculations with exact geometric and homogenized absorber region representations. From first principles to current computer applications, Monte Carlo Calculations in Nuclear Medicine, Second Edition: Applications in Diagnostic Imaging covers the applications of Monte Carlo calculations in nuclear medicine and critically reviews them from a diagnostic perspective.

Like the first edition, this book explains the Monte Carlo method and the principles behind SPECT and. Monte Carlo codes differ in that they allow the use of the most basic pointwise cross-section data directly in a calculation.

Most of the first Monte Carlo codes were not able to utilize this feature, however, because of the memory limitations of early computers and the lack of pointwise cross-section data.Approximation of Integrals via Monte Carlo Methods, with an Application to Calculating Radar Detection Probabilities Graham V.

Weinberg and Ross Kyprianou Electronic Warfare and Radar Division Systems Sciences Laboratory DSTO-TR ABSTRACT The approximation of definite integrals using Monte Carlo simulations is the.Purchase Physics of High-Temperature Reactors - 1st Edition.

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