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[{"key": "dc.contributor.advisor", "value": "Kalvas, Taneli", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Snicker, Antti", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Lyytinen, Tommi", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-03-06T07:02:14Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-03-06T07:02:14Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/85753", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4ss\u00e4 tutkielmassa esitet\u00e4\u00e4n tritiumin hy\u00f6t\u00f6- ja neutronivuolaskelmat HELIAS-\nreaktorille k\u00e4ytt\u00e4en Serpent2 Monte Carlo hiukkasten kuljetuskoodia. Osoitetaan,\nett\u00e4 monimutkaisia HELIAS geometrioita, jotka sis\u00e4lt\u00e4v\u00e4t ei-tasomaiset magneettikentt\u00e4kelat voidaan tuoda suoraan CAD:sta Serpent2-koodiin k\u00e4ytt\u00e4en STL-formaattia. HELIAS-reaktorin 72 ja 360 asteen CAD mallit on luotu k\u00e4ytt\u00e4en parametrista HeliasGeom-ty\u00f6kalua, joille on suoritettu vertailuanalyysi vastaavien MCNP6-\nkoodilla simuloitujen konstruktiivisten kiinte\u00e4n kappaleen geometriamallien kanssa\n(engl. constructive solid geometry, CSG). Lis\u00e4ksi, tritium hy\u00f6t\u00f6suhdetta (TBR) ja\nkelojen neutronisuojausta on tutkittu parametrisesti vaihtelemalla hy\u00f6t\u00f6kerroksen\npaksuutta. Neutronivuon vertailuanalyysi johti keskim\u00e4\u00e4r\u00e4iseen vuon suhteelliseen\npoikkeamaan, joka oli alle 1 % 1.6 \u00d7 10^4 geometriasolussa. TBR-tavoite 1.15 saavutettiin vakioilla hy\u00f6t\u00f6kerroksen paksuuksilla 45 cm ja 28 cm k\u00e4ytt\u00e4en homogeenisia\nDCLL (DCLL, engl. dual-coolant lithium lead) ja HCPB (HCPB, engl. helium-cooled\npebble ped) hy\u00f6t\u00f6kerrosmallien materiaalikoostomuksia. DCLL-mallilla havaittiin\nolevan parempi kelojen neutronisuojaus, sill\u00e4 nopea vuo oli alle rajan 1 \u00d7 10^9 1/cm^2s\nkaikissa keloissa hy\u00f6kerroksen ja sen takatukirakenteen paksuuksilla 50 cm ja 42.5\ncm.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "This thesis presents tritium breeding and neutron flux calculations for a HELIAS reactor using Serpent2 Monte Carlo particle transport code. It is shown that complex HELIAS geometries including non-planar magnetic field coils can be directly imported from CAD to Serpent2 using STL file format. 72 and 360 degree CAD models of HELIAS generated by the parametric HeliasGeom tool have been benchmarked with the corresponding constructive solid geometry (CSG) models simulated with MCNP6 code. Moreover, a parametric study of the tritium breeding ratio (TBR) and neutron shielding of the coils has been carried out by varying the thickness of the breeding blanket. The neutron flux benchmark resulted an average absolute relative neutron flux difference of less than 1 % in 1.6 \u00d7 10^4 geometry cells. The TBR target 1.15 was achieved with constant breeding zone (BZ) thicknesses of 45 cm and 26 cm using homogenized material compositions of dual-coolant lithium lead (DCLL) and helium-cooled pebble ped (HCPB) breeding blankets. The material composition of DCLL was found to have better neutron shielding of the coils, since the fast neutron flux was below the limit 1 \u00d7 10^9 1/cm^2s in all coils using a blanket configuration BZ = 50 cm and BSS = 42.5 cm.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2023-03-06T07:02:14Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-03-06T07:02:14Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "97", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "neutronics", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "HELIAS", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Serpent", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "parametric modeling", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Parametric studies of breeding blanket thickness of a HELIAS stellarator using Monte Carlo neutron transport code Serpent2", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202303062012", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Soveltava fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Applied Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4023", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "reaktorit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "tritium", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "reactors", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "tritium", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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