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RISS 인기검색어
- 검색키워드
- 저자 : Tuomisto, Harri (검색결과 2 건)
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Photochromic photography with hackmanite obtained by large-scale synthesis
Sami Vuori,Hannah Byron,Isabella Norrbo,Minnea Tuomisto,Mika Lastusaari 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Hackmanite (Na8Al6Si6O24(Cl,S)2) is an intelligent mineral that changes its color from white to pink uponexposure to UV radiation, X-rays, or gamma radiation and reverts to white by exposure to visible light orheat. This reversible photochromism can be used in e.g. solar UV indexing, X-ray imaging, gamma radiationdetection, and intelligent clothing. Hackmanite is conventionally synthesized in a laboratory withyields measured in grams, which is low in an industrial aspect when considering the material’s vast applicationportfolio. In this work, we show that it is possible to produce hackmanite in an industrial scalewith the final product yield of up to 1 kg marking a significant advance towards the commercial use ofhackmanite. We also show yet another novel application invention: a photochromic photographic filmthat can be reused indefinitely due to hackmanite’s coloration ability that does not weaken with repeateduse.
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Irradiation testing of enhanced uranium oxide fuels
Insulander Bjö,rk, Klara,Kelly, Julian F.,Vitanza, Carlo,Drera, Saleem S.,Holcombe, Scott,Tverberg, Terje,Tuomisto, Harri,Wright, Jonathan,Sarsfield, Mark,Blench, Trevor,Yang, Jae Ho,Kim, Hyun-Gil Elsevier 2019 Annals of nuclear energy Vol.125 No.-
<P><B>Abstract</B></P> <P>Enhanced uranium oxide fuel types are being tested in the Halden Research Reactor in Norway with the aim is to assess the effect that these enhancements have on fuel performance. Fuel temperatures, rod pressures and dimensional changes are being monitored online and an extensive post-irradiation examination programme is planned. Preliminary data show that fuel centerline temperatures can be lowered by addition of ThO<SUB>2</SUB> to the fuel matrix, or by incorporating Cr or SiO<SUB>2</SUB>-TiO<SUB>2</SUB> as a network structure within the fuel. In parallel, two types of cladding coatings are tested in order to investigate their in-core properties. No abnormal behaviour has been noted during the first 100 days of irradiation.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Irradiation testing of uranium oxide fuel enhanced with Cr, SiO<SUB>2</SUB>/TiO<SUB>2</SUB> and ThO<SUB>2</SUB>. </LI> <LI> Irradiation testing of cladding coated with (Fe,Cr,Al) and (Cr,Al) alloys. </LI> <LI> All tested materials perform as expected, or better. </LI> <LI> Lowered fuel temperatures observed for fuel enhanced with Cr microcell structure. </LI> <LI> Unexpectedly low temperatures observed for SiO<SUB>2</SUB>/TiO<SUB>2</SUB> and 40% ThO<SUB>2</SUB> enhanced fuel. </LI> </UL> </P>
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