The Transmutation of Long-Lived Fission Products by Neutron Irradiation

Salvatores, M.; Slessarev, I.; Tchistiakov, A.

doi:10.13182/nse98-a2008

Cited by 44 publications

(17 citation statements)

References 3 publications

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“…Accurate knowledge of neutron-nucleus reaction cross sections is of primary importance in studies of stellar nucleosynthesis [1,2] and fundamental symmetries [3,4], and in applications of nuclear technology [5][6][7][8]. In addition, important information on level densities, a key ingredient in many nuclear structure and reaction models, can be obtained directly from high-resolution neutron resonance spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Aerts¹,

Fujii²,

Vlastou³

et al. 2006

Phys. Rev. C

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We have measured the neutron capture reaction yield of 232 Th at the neutron time-of-flight facility n TOF at CERN in the energy range from 1 eV to 1 MeV. The average capture cross section has been extracted in the energy range from 4 keV up to 1 MeV with an overall accuracy better than 4%. An independent IAEA evaluation shows good agreement with the data. The average cross section has been expressed in terms of average resonance parameters using the partial waves = 0, 1, and 2.

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Section: Introductionmentioning

confidence: 99%

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Aerts¹,

Fujii²,

Vlastou³

et al. 2006

Phys. Rev. C

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“…The PHWT original procedure was proposed long ago [14]. More recently, this technique has been updated and put on firm ground for the data analysis of several experiments at ORNL [15] and nowadays at n TOF [16], where it has been validated by the study of the 197 Au, Ag, and 56 Fe standard resonances. The γ -ray efficiency of the experimental setup was chosen sufficiently low so that at most one γ ray is detected for each capture cascade.…”

Section: A Pulse Height Weighting Techniquementioning

confidence: 99%

“…In particular, the absolute flux was accurately determined with a calibrated fission chamber from PTB Braunschweig [8]. Consecutively, this measurement was checked by means of several detectors [9] such as SiMon, parallel-plate avalanche counters (PPAC), and fission chambers, and by the analysis of standard resonances in the capture reactions of 197 Au, Ag, and 56 Fe. An absolute normalization of the flux at low energies was also obtained by activation of a gold foil.…”

Section: Absolute Neutron Flux Determinationmentioning

confidence: 99%

“…Therefore, the fuel cannot be heavily loaded with such isotopes. In these cases the priority is to reduce the radiotoxicity of the long-lived fission products with half-lives longer than 10 5 yr (e.g., 93 Zr, 99 Tc, and 135 Cs [56]). For the short-lived fission products ( 151 Sm, 137 Cs, and 90 Sr) the proposed solution is an interim storage facility.…”

Section: B Nuclear Reactorsmentioning

confidence: 99%

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Measurement of theSm151(n,γ) cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n_TOF

Marrone¹,

Abbondanno²,

Aerts³

et al. 2006

Phys. Rev. C

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The 151 Sm(n, γ ) cross section was measured with the time-of-flight technique from 0.6 eV up to 1 MeV relative to the Au standard with an overall uncertainty of typically 6%. Neutrons were produced by spallation at the innovative n TOF facility at CERN; the γ rays from capture events were detected with organic C 6 D 6 scintillators. Experimental setup and data analysis procedures are described with emphasis on the corrections for detection efficiency, background subtraction, and neutron flux determination. At low energies, resonances could be resolved up to about 1 keV, yielding a resonance integral of 3575 ± 210 b, an average s-wave resonance spacing of D 0 = 1.49 ± 0.07 eV, and a neutron strength function of S 0 = (3.87 ± 0.33) × 10 −4 . Maxwellian-averaged capture cross sections are reported for thermal energies between 5 and 100 keV. These results are of relevance for nuclear structure studies, nuclear astrophysics, and nuclear technology. The new value of the Maxwellian-averaged cross section at kT = 30 keV is 3.08 ± 0.15 b, considerably larger than previous theoretical estimates, and provides better constraints for the thermodynamic conditions during the occurrence of the slow neutron capture process in low-mass stars during their asymptotic giant branch phase.

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“…Neutron balance shown in Fig. 7 indicates portion of neutron captures in 93 Zr to be 16% that is inferior only to consumption in 6 Li. Tritium breeding ratio obtained is 1.1 tritium atoms per one fusion (shared as 0.81 and 0.2 between the zones adjacent to the first wall and shielding, correspondingly), so fusion neutron source is a selfsufficient to fuel production.…”

Section: High-flux Transmutation Blanketmentioning

confidence: 99%

Transmutation of Zirconium-93 in High-flux Blanket of Fusion Neutron Source

Takibaev

Saito

Artisyuk

et al. 2000

Journal of Nuclear Science and Technology

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Amongst fission products discharged from a fission reactor, mainly iodine and technetium are considered as of primary concern. Their transmutation has been of high priority to reduce the long-term consequences of nuclear energy generation. So far little attention was given to radioactive 93 Zr, but its hazard appears to be rather substantial. The importance of 93 Zr transmutation is emphasized in the present paper. It is demonstrated that the fusion driven neutron source with high-flux blanket can be applied to transmute 93 Zr sufficiently and resolve the problem of its accumulation within the time period of several decades.

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The Transmutation of Long-Lived Fission Products by Neutron Irradiation

Cited by 44 publications

References 3 publications

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Neutron capture cross section ofTh232measured at the n_TOF facility at CERN in the unresolved resonance region up to 1 MeV

Measurement of theSm151(n,γ) cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n_TOF

Transmutation of Zirconium-93 in High-flux Blanket of Fusion Neutron Source

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