A study on artificial rare earth (RE 2 O 3 ) based neutron absorber

Kim, Kyung-O; Kim, Jong Kyung

doi:10.1016/j.apradiso.2015.07.008

Cited by 9 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The selected elements were Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, and Dy. It should be noted that the total number of spent fuel assemblies discharged in Korea prior to 2008 were 11,121 (Kim, 2012;Feiveson et al, 2011). To estimate the artificial rare earth inventory, the spent fuels were categorized by their enrichment, Table 5.…”

Section: Design Of the Neutron Absorber And Spent Fuel Storagementioning

confidence: 97%

“…Therefore, the disposal costs of these materials are substantial and securing an appropriate disposal site is difficult. In a previous study, a method to reuse artificial rare earth compounds as neutron absorbers in spent fuel storages was first performed (Kim, 2012). Conventionally, for dense spent fuel storage in a limited disposal site, expensive neutron absorbers have been used as the criticality control material in spent fuel storage.…”

Section: Introductionmentioning

confidence: 99%

“…It has been noted that the nuclides in artificial rare earth compounds have high radioactivity (Kim, 2012) because they are produced by the fission reaction of fissionable materials. Therefore, the disposal costs of these materials are substantial and securing an appropriate disposal site is difficult.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An evaluation of the design and performance for a new neutron absorber based on an artificial rare-earth compound

Kim

Park

Shin

et al. 2015

Annals of Nuclear Energy

View full text Add to dashboard Cite

Section: Design Of the Neutron Absorber And Spent Fuel Storagementioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An evaluation of the design and performance for a new neutron absorber based on an artificial rare-earth compound

Kim

Park

Shin

et al. 2015

Annals of Nuclear Energy

View full text Add to dashboard Cite

“…In some degree, the development of nuclear power depends on high performance neutron absorption materials. Neutron has strong penetrating power which is danger than x-rays and gamma rays, so the neutron radiation protection is particularly important [2][3].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Neutron Absorbing Dysprosium Oxide Ceramic

Zhang

Zhao

2016

KEM

View full text Add to dashboard Cite

Dysprosium is a kind of potential neutron absorption material with the thermal neutron absorption cross area of 950 Barn. In this paper, dysprosium oxide (Dy2O3) ceramic was prepared by pressureless sintering. The density, bending strength, fracture toughness and hardness of Dy2O3 ceramics under different sintering schedule were analyzed. The density of Dy2O3 ceramics was enhanced accompanied with the increase in sintering temperature, and it was close to the theoretical value when heated at 1630 °C. Bending strength reached a maximum of 117 MPa when sintering temperature was 1570 °C. However, fracture toughness was inversely proportional to the hardness approximately. As a consequence, the optimum sintering temperature for mechanical property of Dy2O3 ceramics was 1570 °C. The morphology of fracture surface was examined by SEM. The results showed that the porosity of Dy2O3 ceramics decreased with increasing temperature. Meanwhile, the Monte-Carlo software was used to simulate the neutron absorption property. The absorbtivity was about 99.13% when the neutron source was uniform energy spectrum of 10-11 Mev~10-5 Mev and the thickness of Dy2O3 was of 20 mm.

show abstract