Maintenance Management Support Systems for Component Aging Estimation at Nuclear Power Plants

The uptake of strontium ions from an aqueous solution by fibrous cerium(IV) bis(monohydrogenphosphate) has been studied from the viewpoints of the immobilization of strontium in radioactive waste by a batchwise operation in the temperature range from 25 to 250 °C. Strontium ions can be exchanged below 100 °C following an ion-exchange reaction between hydrogen ions of the phosphate groups. In contrast, strontium ions can be effectively immobilized under hydrothermal conditions accompanied by a structural change of the exchanger, where divalent strontium ions are incorporated into the monazite-like compound to compensate tetravalent cerium ions in trivalent cerium orthophosphate system. This phenomenon is peculiar to alkaline earth metal ions, since the monazite-like compounds were obtained in the presence of Ca2+ and Ba2+, while this phenomenon was absent in the presence of Cu2+ or Ni2+.

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Immobilization of Strontium by Cerium Hydrogen Phosphate

Hayashi¹,

Ebina²,

Torii³

1995

Chemistry Letters

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Maintenance Management Support Systems for Component Aging Estimation at Nuclear Power Plants

Cited by 3 publications

References 3 publications

Decision-Making Support Systems for Reliability-Centered Maintenance

Decision-Making Support Systems for Reliability-Centered Maintenance

Strontium Immobilization by Fibrous Cerium(IV) Bis(monohydrogenphosphate) under Hydrothermal Conditions

Immobilization of Strontium by Cerium Hydrogen Phosphate

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