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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>
Watanabe, H.,Lorusso, G.,Nishimura, S.,Otsuka, T.,Ogawa, K.,Xu, Z. Y.,Sumikama, T.,Sö,derströ,m, P.-A.,Doornenbal, P.,Li, Z.,Browne, F.,Gey, G.,Jung, H. S.,Taprogge, J.,Vajta, Zs.,Wu, J.,Yagi, American Physical Society 2014 Physical Review Letters Vol.113 No.4
<P>A new isomer with a half-life of 23.0(8) ms has been identified at 2406 keV in (126)Pd and is proposed to have a spin and parity of 10(+) with a maximally aligned configuration comprising two neutron holes in the 1h(11/2) orbit. In addition to an internal-decay branch through a hindered electric octupole transition, β decay from the long-lived isomer was observed to populate excited states at high spins in (126)Ag. The smaller energy difference between the 10(+) and 7(-) isomers in (126)Pd than in the heavier N=80 isotones can be interpreted as being ascribed to the monopole shift of the 1h(11/2) neutron orbit. The effects of the monopole interaction on the evolution of single-neutron energies below (132)Sn are discussed in terms of the central and tensor forces.</P>
Plasma zinc's alter ego is a low-molecular-weight humoral factor
Ou, Ou,Allen-Redpath, Keith,Urgast, Dagmar,Gordon, Margaret-Jane,Campbell, Gill,Feldmann, Jö,rg,Nixon, Graeme F.,Mayer, Claus-Dieter,Kwun, In-Sook,Beattie, John H. The Federation of American Societies for Experimen 2013 The FASEB Journal Vol.27 No.9
<P>Mild dietary zinc deprivation in humans and rodents has little effect on blood plasma zinc levels, and yet cellular consequences of zinc depletion can be detected in vascular and other tissues. We proposed that a zinc-regulated humoral factor might mediate the effects of zinc deprivation. Using a novel approach, primary rat vascular smooth muscle cells (VSMCs) were treated with plasma from zinc-deficient (<1 mg Zn/kg) or zinc-adequate (35 mg Zn/kg, pair-fed) adult male rats, and zinc levels were manipulated to distinguish direct and indirect effects of plasma zinc. Gene expression changes were analyzed by microarray and qPCR, and incubation of VSMCs with blood plasma from zinc-deficient rats strongly changed the expression of >2500 genes, compared to incubation of cells with zinc-adequate rat plasma. We demonstrated that this effect was caused by a low-molecular-weight (∼2-kDa) zinc-regulated humoral factor but that changes in gene expression were mostly reversed by adding zinc back to zinc-deficient plasma. Strongly regulated genes were overrepresented in pathways associated with immune function and development. We conclude that zinc deficiency induces the production of a low-molecular-weight humoral factor whose influence on VSMC gene expression is blocked by plasma zinc. This factor is therefore under dual control by zinc.—Ou, O., Allen-Redpath, K., Urgast, D., Gordon, M.-J., Campbell, G., Feldmann, J., Nixon, G. F., Mayer, C.-D., Kwun, I.-S., and Beattie, J. H. Plasma zinc's alter ego is a low-molecular-weight humoral factor.</P>
Barlesi, F.,Scherpereel, A.,Gorbunova, V.,Gervais, R.,Vikströ,m, A.,Chouaid, C.,Chella, A.,Kim, J. H.,Ahn, M. J.,Reck, M.,Pazzola, A.,Kim, H. T.,Aerts, J. G,Morando, C.,Loundou, A.,Groen, H. J. M. Oxford University Press 2014 Annals of oncology Vol.25 No.5
<P>The randomized, phase III AVAPERL trial evaluated the safety and efficacy of bevacizumab maintenance with or without pemetrexed in nonsquamous non–small cell lung cancer (nsNSCLC). Progression-free survival (PFS) was significantly prolonged with bevacizumab–pemetrexed. At a median follow-up of 14.8 months, OS events occurred in 58% of all patients. OS was numerically longer with bevacizumab–pemetrexed versus bevacizumab when measured from randomization (17.1 versus 13.2 months, HR, 0.87 [0.63–1.21]; P=0.29). Second-line therapy was administered in 77% and 70% of patients in the bevacizumab and bevacizumab–pemetrexed arms, respectively.</P>
Two-hole structure outsideNi78: Existence of aμsisomer ofCo76andβdecay intoNi76
Sö,derströ,m, P.-A.,Nishimura, S.,Xu, Z. Y.,Sieja, K.,Werner, V.,Doornenbal, P.,Lorusso, G.,Browne, F.,Gey, G.,Jung, H. S.,Sumikama, T.,Taprogge, J.,Vajta, Zs.,Watanabe, H.,Wu, J.,Baba, H.,Dom American Physical Society 2015 PHYSICAL REVIEW C - Vol.92 No.5
βdecay of semi-magicCd130: Revision and extension of the level scheme ofIn130
Jungclaus, A.,Grawe, H.,Nishimura, S.,Doornenbal, P.,Lorusso, G.,Simpson, G. S.,Sö,derströ,m, P.-A.,Sumikama, T.,Taprogge, J.,Xu, Z. Y.,Baba, H.,Browne, F.,Fukuda, N.,Gernhä,user, R.,Gey, American Physical Society 2016 Physical Review C Vol.94 No.2
<P>The beta decay of the semi-magic nucleus Cd-130 has been studied at the RIBF facility at the RIKEN Nishina Center. The high statistics of the present experiment allowed for a revision of the established level scheme of In-130 and the observation of additional beta feeding to high- lying core-excited states in In-130. The experimental results are compared to shell-model calculations employing a model space consisting of the full major N = 50-82 neutron and Z = 28-50 proton shells and the NA-14 interaction, and good agreement is found.</P>
Nuclear structure and β -decay schemes for Te nuclides beyond N=82
Moon, B.,Moon, C.-B.,Sö,derströ,m, P.-A.,Odahara, A.,Lozeva, R.,Hong, B.,Browne, F.,Jung, H. S.,Lee, P.,Lee, C. S.,Yagi, A.,Yuan, C.,Nishimura, S.,Doornenbal, P.,Lorusso, G.,Sumikama, T.,Watan American Physical Society 2017 Physical Review C Vol.95 No.4
<P>We study for the first time the internal structure of Te-140 through the beta-delayed gamma-ray spectroscopy of Sb-140. The very neutron-rich Sb-140 nuclei with Z = 51 and N = 89 were produced by the in-flight fission of U-238 beams at the Radioactive Isotope Beam Factory, RIKEN. The half-life and spin-parity of Sb-140 are reported as 173 +/- 12 ms and 3(-), respectively. In addition to the excited states of Te-140 produced by the beta-decay branch, the beta-delayed one-neutron and two-neutron emission branches were also established. By identifying the first 2(+) and 4(+) excited states of Te-140, we found that Te isotopes persist in their vibrator character with E(4(+))/E(2(+)) = 2. We discuss the distinctive features manifest in this region revealed in pairs of isotopes with the same neutron holes and particles with respect to N = 82.</P>
β-delayedγ-ray spectroscopy of non-yrast states inTe138near the neutron drip line
Lee, P.,Moon, C.-B.,Lee, C. S.,Odahara, A.,Lozeva, R.,Yagi, A.,Nishimura, S.,Doornenbal, P.,Lorusso, G.,Sö,derströ,m, P.-A.,Sumikama, T.,Watanabe, H.,Isobe, T.,Baba, H.,Sakurai, H.,Browne, F. American Physical Society 2015 PHYSICAL REVIEW C - Vol.92 No.4
New decay scheme of theSb8551136<sup>6−</sup>isomer
Lozeva, R.,Odahara, A.,Moon, C.-B.,Nishimura, S.,Doornenbal, P.,Naï,dja, H.,Nowacki, F.,Sö,derströ,m, P.-A.,Sumikama, T.,Lorusso, G.,Wu, J.,Xu, Z. Y.,Baba, H.,Browne, F.,Daido, R.,Daugas, American Physical Society 2015 PHYSICAL REVIEW C - Vol.92 No.2