Basic Experimental Study on Effectiveness of Nuclear Waste Long-Term Storage Containers With Par for Reducing Concentration of Hydrogen Gas

Ueta, Kohei; Kawasaki, Genya; Hiraki, Yoshihisa; Takase, Gaku; Matsumoto, Yoshinobu; Takase, Kazuyuki

doi:10.1299/jsmeicone.2019.27.1809

Cited by 1 publication

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“…In consideration of the synthesis of a geopolymer as a catalyst support, 12 the volume of the geopolymer needs to be maintained at a stable level. However, during curing, shrinkage takes place which is primarily caused by the loss of water in the drying process 13 .…”

Section: Introductionmentioning

confidence: 99%

Pore‐forming process in dehydration of metakaolin‐based geopolymer

Yang

Kudo

et al. 2021

Int J Ceramic Engine & Sci

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The geopolymer catalyst supports utilized in the nuclear waste containers for the Fukushima Daiichi Nuclear Power Station, will be required to have high porosity, and durability. This work presents the synthesis of a potassium and metakaolin based geopolymer and its performance upon dehydration. During water content measurements of the samples, it was seen that in the demolded samples, the water content quickly decreased to less than 30% within 7 days, while the samples, that had the cap removed from the container retained more than 50% of the water Accepted ArticleThis article is protected by copyright. All rights reserved after 28 days. The pore size distribution of the samples that were post-cured at different temperatures up to 28 days did not vary greatly with respect to the average pore size. We can infer that structurally stable pores were formed in the first 4 days and were not affected by the post-curing rate, which may be related to rheological properties and the drainage path of water or hydrogen gas during post-curing.

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Section: Introductionmentioning

confidence: 99%