• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2005 Fiscal Year Final Research Report Summary

Construction of the standard system for absolute measurement of tritium

Research Project

Project/Area Number 15206103
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionUniversity of Toyama

Principal Investigator

MATSUYAMA Masao  University of Toyama, Hydrogen Isotope Research Center, Professor, 水素同位体科学研究センター, 教授 (90135004)

Co-Investigator(Kenkyū-buntansha) HATANO Yuji  University of Toyama, Hydrogen Isotope Research Center, Professor, 水素同位体科学研究センター, 教授 (80218487)
TORIKAI Yuji  University of Toyama, Hydrogen Isotope Research Center, Lecturer, 水素同位体科学研究センター, 講師 (80313592)
HARA Masanori  University of Toyama, Hydrogen Isotope Research Center, Research Associate, 水素同位体科学研究センター, 助手 (00334714)
Project Period (FY) 2003 – 2005
Keywordstritiated water / non-destructive measurement / heat of decay / calorimeter / standard system / fusion reactor / tritium plant
Research Abstract

To evaluate the absolute amount of tritium, a calorimetric system was designed and constructed, and its basic performance has been tested. The calorimetric system is applicable to measure solid, liquid and gaseous tritium. For this application the present calorimetric system is equipped with a high sensitivity calorimeter, a tritium container, total pressure gauges, a quadrupole mass spectrometer, and high vacuum systems. A twin type thermal conductivity calorimeter with a vacuum shielding was specially employed for the present purpose. A calibration curve of the calorimeter has been prepared at first using solid materials absorbed a given amount of tritium, and the following linear relation was obtained : E_<out>=(0.2694±0.0010) Q_<in>, where E_<out> describes the output (μV) from the heat sensors and Q_<in> the input power (μW) by Joule heating to the sample cell. In addition, the lower detection limit was estimated to be 0.15μW from stability of the calorimeter, which corresponds to the tritium amount of 0.16 GBq. As the first test, Zr-Ni alloy powder loaded with a given amount of tritium was measured by the calorimeter and the amount of tritium was evaluated to be 26.3 GBq, which was a little lower than the tritium activity determined previously by using a small ionization chamber. The second test was applied to measurement of tritiated water. The observed calorific value was about ten times greater than that of the expected value. It was seen that this is due to the oxidation reaction of a liquid cell with oxygen dissolved into tritiated water. Improvement of a liquid cell will lead to successful measurements of tritium.

  • Research Products

    (2 results)

All 2006 2005

All Journal Article (2 results)

  • [Journal Article] Absolute Measurement of Tritium by High Sensitivity Calorimeter(I)2006

    • Author(s)
      Masao Matsuyama
    • Journal Title

      Ann.Rept.Hydrogen Isotope Res.Center, University of Toyama 25(in press)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Absolute Measurement of Tritium by High Sensitivity Calorimeter (I)2005

    • Author(s)
      M.Matsuyama
    • Journal Title

      Ann.Rept, Hydrogen Isotope Research Center, Uriiversity of Toyama (in press)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi