| Project/Area Number |
10640479
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
地球化学
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| Research Institution | Ibaraki National College of Technology |
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Principal Investigator |
MATSUZAWA Takao Ibaraki National College of Technology, Department of Science, Associate Professor, 自然科学科, 助教授 (40005989)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Shinji Department of Science, Associate Professor, 自然科学科, 助教授 (70249746)
SOETA Takayuki Department of Science, Associate Professor,, 自然科学科, 助教授 (70197002)
YAMAMOTO Shigeki Department of Science, Professor, 自然科学科, 教授 (90123984)
KAWAHARA Nagaaki Department of Science, Associate Professor, 自然科学科, 助教授 (30204754)
OSAMOTO Yoshio Department of Science, Professor, 自然科学科, 教授 (50114012)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1999: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | radon / Ina Valley / Median Tectonic Line / school building / progeny / CR-39 / 伊那谷断層 |
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| Research Abstract |
We measured the radon concentrations in classroom of Ibaraki National College of Technology, with passive type (CR-39) radon gas monitor. We also made the students to measure their room in their homes with same type radon monitors. This experiments cause them to recognize the actual existing of natural radioisotopes around their bodies.
We measured the radon gas concentration in the computer center of Ibaraki National College of Technology, When the ventilator is off, the radon concentration increase up to 600-900 Bq/m3[EEC]. We collaborate the professional radon researchers, NRI and the University Tokyo, to investigate the characteristics of the air in the computer center of our school.
The concentration of radon and her progeny, Po-218, Pb-214, Bi-214, equivalence radon concentration, distribution of diameter of aerosol, ratio of free radon, ventilation rate, characteristics of filters of ventilator and air conditioner, so on. Operation of the air conditioner cause increase the rate of free radon,. Thus, we have not special equipment, but this experiment emphasize the interest to student and teachers the existence of natural radio isotopes around our bodies. We carried on this experiment in various schools, especially in the schools along the Median Tectonic Line and Ina Valley.
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