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MCNPX simulations of the SCANDAL setup for measurement of neutron scattering cross section at 175MeV
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.
Show others and affiliations
2010 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 81, no 6, 065202- p.Article in journal (Refereed) Published
Abstract [en]

The Scattered Nucleon Detection Assembly (SCANDAL) setup at The Svedberg Laboratory has been used to produce neutron elastic scattering cross section data at 175MeV for bismuth and iron. This work presents MCNPX simulations of the experimental setup and aims to describe processes and data important for the upcoming off-line data analysis. In the experiment, neutrons scattered off the target are converted to protons, which are stopped in scintillator crystals. The results include a description of the proton spectra dependence on the neutron-to-proton conversion angle, suggesting a cut at a conversion angle of 15.2 degrees. Calculation of the hit position gates indicates high proton leakage from the crystals. A study of the converter describes the role of its chemical composition and also the role of other plastic scintillators on the proton spectra. The neutron-to-proton conversion efficiency of the converter simulated by MCNPX is 5.1x10(-4) and corresponds to theoretical predictions.

Place, publisher, year, edition, pages
2010. Vol. 81, no 6, 065202- p.
Keyword [en]
INTRANUCLEAR CASCADE CALCULATION, FACILITY
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-27531DOI: 10.1088/0031-8949/81/06/065202ISI: 000278412300008Scopus ID: 2-s2.0-77953213233OAI: oai:DiVA.org:kth-27531DiVA: diva2:379334
Funder
Swedish Research Council
Note
QC 20101217Available from: 2010-12-17 Created: 2010-12-13 Last updated: 2017-12-11Bibliographically approved
In thesis
1. MCNPX Simulations for Neutron Cross Section Measurements
Open this publication in new window or tab >>MCNPX Simulations for Neutron Cross Section Measurements
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis presents MCNPX simulations of the SCANDAL set-up used at the Theodor Svedberg Laboratory for neutron scattering cross-section measurements. The thesis describes processes and data important for the upcoming off-line data analysis. In the experiment, neutrons scattered off the target are converted to protons which are stopped in scintillator crystals. The results of presented simulations include a description of the proton spectra in dependence of the neutron-to-proton conversion angle, calculation of the hit position gates and a study of the converter describing the role of its chemical composition and also the role of other plastic scintillator on the proton spectra.

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. ix, 28 p.
Series
Trita-FYS, ISSN 0280-316X
Keyword
MCNPX, neutron, cross section
Identifiers
urn:nbn:se:kth:diva-12929 (URN)978-91-7415-643-0 (ISBN)
Presentation
2010-05-25, FA32, AlbaNova, Stockholm, Stockholm, 12:38 (English)
Opponent
Supervisors
Note
QC 20100520Available from: 2010-05-20 Created: 2010-05-19 Last updated: 2012-02-23Bibliographically approved
2. Science and Technology for Americium Transmutation
Open this publication in new window or tab >>Science and Technology for Americium Transmutation
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Americium could be seen as the most troublesome element that is presentin nuclear fuel. This thesis offers different points of view on the possibility ofamericium transmutation. The first point of view elaborates simulations ofamericium-bearing facilities, namely nuclear data, a popular computationalcode and modeling techniques. The second point of view is focused on practicalusage of the simulations to examine upper limit of americium in a specificreactor.

Abstract [sv]

Americium är ett av det mest besvärande elementen i använt kärnbränsle.Denna avhandling behandlar olika aspekter av möjligheten att transmuteraamericium i snabba reaktorsystem. I den första varianten utarbetas simuleringaroch beräkningsmodeller för neutrondatamätningar av betydelse föracceleratordrivna system avsedda att transmutera americium. I den senareundersöks mer praktiska tillämpningar, i synnerhet beräknas gränser för hurmycket americium som kan laddas i bränslet för kritiska bykylda reaktorer.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. xii, 62 p.
Series
TRITA-FYS, ISSN 0280-316X ; 2012:21
National Category
Other Physics Topics
Identifiers
urn:nbn:se:kth:diva-100186 (URN)978-91-7501-326-8 (ISBN)
Public defence
2012-08-17, F3, Lindstedtsvägen 26, KTH, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

QC 20120806

Available from: 2012-08-06 Created: 2012-08-06 Last updated: 2017-03-02Bibliographically approved

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