Kinetics of Conversion of High-Level Waste to Glass.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Kinetics of Conversion of High-Level Waste to Glass.

Popis výsledku v původním jazyce

The kinetics of the conversion of high-level waste (HLW) feed to glass controls the rate of HLW processing. Simulated HLW feed and low silicaůhigh sodium (LSHS) feed with co-precipitated Fe, Ni, Cr, and Mn hydroxides (to simulate the chemical and physical makeup of these components in the melter feed) were heated at constant temperature-increase rates (0.4, 4, and 14 C/min), quenched at different stages of conversion, and analyzed with optical microscope, scanning electron microscope, and x-ray diffraction (XRD). Quartz, sodium nitrate, carnegieite [Na8Al4Si4O18], sodalite [Na8(AlSiO4)6(NO2)2], and spinel were identified in the samples. Mass fractions of these phases were determined as functions of the temperature and the heating rate. The fractions ofnitrates and quartz decreased with increasing temperature, starting above 550 C and dropping to zero at 850 C. Spinel was present in the feed within the temperature interval from 350 C to 1050 C, peaking between 550 C and 700 C. Sodalite

Název v anglickém jazyce

Kinetics of Conversion of High-Level Waste to Glass.

Popis výsledku anglicky

The kinetics of the conversion of high-level waste (HLW) feed to glass controls the rate of HLW processing. Simulated HLW feed and low silicaůhigh sodium (LSHS) feed with co-precipitated Fe, Ni, Cr, and Mn hydroxides (to simulate the chemical and physical makeup of these components in the melter feed) were heated at constant temperature-increase rates (0.4, 4, and 14 C/min), quenched at different stages of conversion, and analyzed with optical microscope, scanning electron microscope, and x-ray diffraction (XRD). Quartz, sodium nitrate, carnegieite [Na8Al4Si4O18], sodalite [Na8(AlSiO4)6(NO2)2], and spinel were identified in the samples. Mass fractions of these phases were determined as functions of the temperature and the heating rate. The fractions ofnitrates and quartz decreased with increasing temperature, starting above 550 C and dropping to zero at 850 C. Spinel was present in the feed within the temperature interval from 350 C to 1050 C, peaking between 550 C and 700 C. Sodalite

Druh

C - Kapitola v odborné knize

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2000

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Nuclear Site Remediation.

ISBN

0-8412-3718-2

Počet stran výsledku

15

Strana od-do

314-328

Počet stran knihy

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Název nakladatele

American Chemical Society

Místo vydání

N/A

Kód UT WoS kapitoly

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