Effect of radiation on bulk swelling of plutonium alloys

Thiebaut, Christophe; Baclet, N.; Ravat, B.; Giraud, Pierre; Julia, Pascale

doi:10.1016/j.jnucmat.2006.12.024

Cited by 19 publications

(11 citation statements)

References 6 publications

(9 reference statements)

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“…volume increase, formation of defects, growth of helium bubbles numbers and other phenomena [1,6,11,12,20,21]. In our case, we discovered a non-monotonic evolution of mean-square static displacements in plutonium matrix.…”

Section: Discussionsupporting

confidence: 52%

“…These changes result from a-decay of plutonium isotopes with the formation of a-particles and actinide nuclei. Both a-particles and actinide nuclei create displacement cascades, and a-particles turn into He atoms and cluster into bubbles [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Research on irradiation defects in plutonium and its alloys was performed by various methods [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][26][27][28][29][30][31]: by measuring length changes, density, electrical resistance, magnetic susceptibility, positron annihilation, by transmission electron microscopy, Xray and neutron diffraction, and by computer simulation. Supplementary data are provided by research on irradiation of plutonium and its alloys by external sources [7].…”

Section: Introductionmentioning

confidence: 99%

“…Supplementary data are provided by research on irradiation of plutonium and its alloys by external sources [7]. Based on available data [1][2][3]11,14,20], one concludes that after initial stage of accumulating defects (Frenkel defects and impurity atoms of decay products), which lasts over a few years, there is a steady increase of the concentration of helium bubbles, and the volume of the material increases as well. According to the computer simulations, the cavities with long aging periods (up to 100 years) can make a considerable contribution to the volume growth, though such long periods have not been yet experimentally studied [20].…”

Section: Introductionmentioning

confidence: 99%

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Research on long-time self-irradiation of alloy δ-Pu242–Ga

Соменков¹,

Blanter²,

Глазков³

et al. 2011

Journal of Nuclear Materials

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Section: Discussionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on long-time self-irradiation of alloy δ-Pu242–Ga

Соменков¹,

Blanter²,

Глазков³

et al. 2011

Journal of Nuclear Materials

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“…These changes are induced by the α decay of pluto nium isotopes with the formation of α particles and nuclei of other actinides. Both α particles and nuclei of actinides generate cascades of displacements; the α particles transform into He atoms and are gathered into bubbles [1,2].…”

Section: Introductionmentioning

confidence: 99%

Neutron diffraction analysis of atomic displacements in δ-Pu-Ga alloys upon long-term self-irradiation

Blanter

Глазков

Laushkin

et al. 2012

Phys. Metals Metallogr.

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The process of self irradiation of a Pu-Ga alloy has been studied by the neutron diffraction method with the determination of the crystal structure and root mean square atomic displacements 〈u 2 〉 (from the data on the Debye-Waller factor). The analysis was carried out at room temperature on the sample with an fcc structure prepared on the basis of a Pu 242 isotope feebly absorbing neutrons, in which a quickly decaying Pu 238 isotope (1.4 at %) was added to intensify self irradiation processes; this accelerated the aging processes by four times and allowed achieving the maximum equivalent self irradiation time of ~23.5 years. The fcc structure was preserved during all this time interval. An analysis of the small angle neutron scattering has demonstrated that the sample also contained precipitates with a size of a few hundreds of microns, which did not change during the aging. A change in 〈u 2 〉 (due to static displacements) occurs in two stages, i.e., a relatively rapid growth (by about 50%) during the first 5-6 years of self irradiation, and a slow decrease in the subsequent 6-23 equivalent years to nearly the magnitude that exceeds the initial value by ~20%. The latter stage can be explained by the sinking of continuously generated point defects to helium bubbles and dislocations loops accu mulating with time. The extrapolation of the decrease in 〈u 2 〉 to large aging times demonstrates that if the mech anism of point defect accumulation initiated at the first stage of the self irradiation does not change with time, the growth of 〈u 2 〉 will disappear by about 50 years of equivalent time of self irradiation.

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