Early construction and operation of the highly contaminated water treatment system in Fukushima Daiichi Nuclear Power Station (IV) - Assessment of hydrogen behavior in stored Cs adsorption vessel

Masahiro Kondo, Takahiro Arai, Yoshihisa Nishi, Masahiro Furuya, Taizou Kanai, Ryo Morita, Yuta Uchiyama, Masaaki Satake, Kenetsu Shirakawa, Yasushi Nauchi, Tadafumi Koyama, Keiji Ishikawa, Shunichi Suzuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Hydrogen diffusion behavior in a cesium adsorption vessel is assessed. The vessel is used to remove radioactive substance from contaminated water, which is proceeded from Fukushima accident. Experiment and numerical calculation are conducted to clarify the characteristics of natural circulation in the vessel. The natural circulation arising from the temperature difference between inside and outside the vessel is confirmed. We develop an evaluation model to predict the natural circulation and its prediction agrees well with the results obtained by the experiment and the calculation. Using the model, we predict steady and transient behavior of hydrogen concentration. Results indicate that hydrogen concentration is kept lower than the flammability limit when the short vent pipe is open.

Original languageEnglish
Pages (from-to)916-929
Number of pages14
JournalJournal of Nuclear Science and Technology
Volume51
Issue number7-8
DOIs
Publication statusPublished - 2014 Aug 3
Externally publishedYes

Fingerprint

water treatment
Water treatment
Nuclear power plants
vessels
stations
Adsorption
Hydrogen
adsorption
hydrogen
Vents
Flammability
Cesium
flammability
vents
Accidents
accidents
Experiments
Pipe
cesium
temperature gradients

Keywords

  • adsorption
  • calculation
  • cesium
  • CFD
  • contaminated water
  • experiment
  • Hydrogen
  • natural circulation
  • radioactive waste
  • zeolite

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

Cite this

Early construction and operation of the highly contaminated water treatment system in Fukushima Daiichi Nuclear Power Station (IV) - Assessment of hydrogen behavior in stored Cs adsorption vessel. / Kondo, Masahiro; Arai, Takahiro; Nishi, Yoshihisa; Furuya, Masahiro; Kanai, Taizou; Morita, Ryo; Uchiyama, Yuta; Satake, Masaaki; Shirakawa, Kenetsu; Nauchi, Yasushi; Koyama, Tadafumi; Ishikawa, Keiji; Suzuki, Shunichi.

In: Journal of Nuclear Science and Technology, Vol. 51, No. 7-8, 03.08.2014, p. 916-929.

Research output: Contribution to journalArticle

Kondo, Masahiro ; Arai, Takahiro ; Nishi, Yoshihisa ; Furuya, Masahiro ; Kanai, Taizou ; Morita, Ryo ; Uchiyama, Yuta ; Satake, Masaaki ; Shirakawa, Kenetsu ; Nauchi, Yasushi ; Koyama, Tadafumi ; Ishikawa, Keiji ; Suzuki, Shunichi. / Early construction and operation of the highly contaminated water treatment system in Fukushima Daiichi Nuclear Power Station (IV) - Assessment of hydrogen behavior in stored Cs adsorption vessel. In: Journal of Nuclear Science and Technology. 2014 ; Vol. 51, No. 7-8. pp. 916-929.
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