2017 Measurement of Environmental Radiation

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Academic unit or major
Graduate major in Nuclear Engineering
Oguri Yoshiyuki  Chiba Satoshi  Matsumoto Yoshihisa  Sagara Hiroshi  Katabuchi Tatsuya 
Course component(s)
Lecture /
Mode of instruction
Day/Period(Room No.)
Intensive ()  
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Academic year
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Syllabus updated
Lecture notes updated
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Course description and aims

Fieldwork will be conducted in which multiple types of radiation detectors are used to measure environmental air dose and radiation levels of soils in Fukushima Prefecture, to give students hands-on experience of measuring environmental impact caused by large-scale nuclear accidents. Additionally, plant leaf samples and other environmental samples will be collected, isotope identification will be conducted using them, and the spatial distribution of radionuclides will be measured. Additionally, students will have their levels of internal exposure measured with a whole-body counter.

To obtain skills for radiation detection and analysis of radioactivity, and to understand radiation levels after a severe accident of nuclear power plant

Student learning outcomes

To obtain skills for using a wide range of radiation detectors in order to play an active part in nuclear industries


Radiation survey meter, Radiation spectrometer, Imaging plate, Whole-body counter

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

After lectures on the use a wide range of radiation detectors, field work will be performed. Then, retrieved samples will be analyzed.

Course schedule/Required learning

  Course schedule Required learning
Class 1 How to use radiation survey meters Characteristics of the survey meters
Class 2 How to use radiation spectrometers Characteristics of the spectrometer
Class 3 How to use an imaging plate Characteristics of the imaging plate
Class 4 How to use a whole-body counter Characteristics of the whole-body counter
Class 5 Field work Spatial distribution of radiation dose
Class 6 Field work Collection of soil samples
Class 7 Field work Collection of plant leaf samples
Class 8 Sensitivity calibration of the whole-body counter Absolute sensitivity calibration of the whole-body counter
Class 9 Measurement of radioactivity in the body Measurement of radioactivity in the body by the whole-body counter
Class 10 Evaluation of internal exposure Evaluation of internal exposure dose by the measured radioactivity in the body
Class 11 Sensitivity calibration of the gamma-ray spectrometer Absolute sensitivity calibration of the gamma-ray spectrometer for radioactivity measurement of the soil samples
Class 12 Prepararion of soil samples Preparation of homogenized and pelletized soil samples
Class 13 Preparation of plant samples Preparation of plant leaf samples
Class 14 Analysis of radioactivities and nuclides of retrieved samples How to identify radioactive nuclides and determine their radioactivities
Class 15 Analysis of two-dimensional distribution of radioactivities in retrieved samples Radioactive-nuclide movement mechanism



Reference books, course materials, etc.

Instruction manuals for all detectors will be distributed in the class.

Assessment criteria and methods

Lab reports

Related courses

  • None

Prerequisites (i.e., required knowledge, skills, courses, etc.)


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