Application of InGaP space solar cells for a radiation dosimetry at high dose rates environment of Fukushima Daiichi nuclear power plant

Yasuki Okuno, Nariaki Okubo, Mitsuru Imaizumi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Decommissioning the Fukushima Daiichi nuclear power plant (1F) after the accident caused by a tsunami in 2011 requires characterization of the fuel debris by dose distribution measurement. This paper describes the experimental and theoretical behavior of a radiation detector applied with InGaP solar cells is investigated and allow the localization and characterization of the fuel debris. In the irradiation test, it was observed that the radiation-induced current output of the InGaP solar cells increases linearly with increasing dose rates of 60Co γ-rays. For measurements at low dose rates, it becomes clear that the minimum detectable dose rate and resolution can be determined by analyzing the noise characterization. The maximum detectable level of radiation dosimetry for the InGaP solar cell was found to be higher than the highest γ-ray dose rate observable at the reactor core for 1F plants. Additionally, as an analysis of the radiation-induced current, it is attempted to express a relational expression between the absorbed dose rate and the creation of radiation-induced current pairs in the solar cells. The experimental and simulation results suggest that solar cells can be powerful tools for radiation dosimetry in high dose rate environments near the debris of the 1F plant.

Original languageEnglish
Pages (from-to)851-858
Number of pages8
Journaljournal of nuclear science and technology
Volume56
Issue number9-10
DOIs
Publication statusPublished - 2019 Oct 3
Externally publishedYes

Keywords

  • dosimetry
  • electron-hole pair generation
  • High dose rate
  • InGaP compound semiconductor
  • radiation-induced current
  • short-circuit current
  • solar cell
  • solar cell

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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