Chemical state mapping of degraded B4C control rod investigated with soft X-ray emission spectrometer in electron probe micro-analysis

R. Kasada, Y. Ha, T. Higuchi, K. Sakamoto

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5 Citations (Scopus)

Abstract

B4C is widely used as control rods in light water reactors, such as the Fukushima Daiichi nuclear power plant, because it shows excellent neutron absorption and has a high melting point. However, B4C can melt at lower temperatures owing to eutectic interactions with stainless steel and can even evaporate by reacting with high-temperature steam under severe accident conditions. To reduce the risk of recriticality, a precise understanding of the location and chemical state of B in the melt core is necessary. Here we show that a novel soft X-ray emission spectrometer in electron probe microanalysis can help to obtain a chemical state map of B in a modeled control rod after a high-temperature steam oxidation test.

Original languageEnglish
Article number25700
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 May 10
Externally publishedYes

ASJC Scopus subject areas

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