1996 Fiscal Year Final Research Report Summary
DEVELOPMENT OF REAL TIME MEASUREMENT SYSTEM WITH HIGH POSITION RESOLUTION FOR NEUTRON FLUX DISTRIBUTION USING OPTICAL FIBER
| Project/Area Number |
07558184
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
エネルギー学一般・原子力学
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
MORI Chizuo NAGOYA UNIVERSITY,NUCLEAR ENGINEERING,PROFESSOR, 工学部, 教授 (80023068)
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| Co-Investigator(Kenkyū-buntansha) |
ICHIHARA Chihiro KYOTO UNIVERSITY,RESEARCH REACTOR INSTITUTE,RES,ASSIST., 原子炉実験所, 助手 (90027475)
KOBAYASHI Keiji KYOTO UNIVERSITY,RESEARCH REACTOR INSTITUTE,RES,ASSIST., 原子炉実験所, 助手 (30027445)
SHIROYA Seiji KYOTO UNIVERSITY,RESEARCH REACTOR INSTITUTE,PROFESSOR, 原子炉実験所, 教授 (80027474)
SAKUMA Youichi NATIONAL INSTITUTE FOR FUSION SCIENCE,DIVISION OF RADIATION PROTECTION,ASSOCIATE, 放射線管理部, 助教授 (30133119)
URITANI Akira NAGOYA UNIVERSITY,NUCLEAR ENGINEERING,ASSIST,PROFESSOR, 工学部, 助手 (10213521)
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| Project Period (FY) |
1995 – 1996
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| Keywords | NEUTRON FLUX / GAMMA-RAYS / POSTITION DISTRIBUTION / OPTICAL FIBR / SCINTILLATOR / NARROW GAP / FAST NEUTRONS / QUICK MEASUREMENT |
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| Research Abstract |
A NEW METHOD TO MEASURE NEUTRON FLUX AND GAMMA-RAY INTENSITY DISTRIBUTIONS IN VERY NARROW SPACE HAS BEEN DEVELOPED.IN THIS METHOD.THE TIP OF AN OPTICAL FIBER IS PAINTED WITH A MIXTURE OF ZnS (Ag) SCINTILLATOR,NEUTRON CONVERTOR (LI-6 OR U-235 FOR THERMAL NEUTRONS AND EPTTHERMAL NEUTRONS.AND TH-232 FOR FAST NEUTRONS) AND ADHESIVE PASTE.
THE DETECTOR IS MOVED WITH ACONSTANT SPEED OR INTERMITTENTLY BY A FIBER DRIVER CONTROLLED WITH A PERSONAL COMPUTER.THE SUBURACTION OF A PART OF THE DISTRIBUTIONOBTAINED WITH Th-232 FORM THAT OBTAINED WITH U-235 GAVE THE DISTRIBUTION OF THERMAL AND EPITHERMAL NEUTRON DISTRIBUTION.
FOR GAMMA-RAY MEASURMENT,THE TIP IS COVERED WITH ONLY ZnS (Ag) OR CsI (TI) SCINTILLATOR.THE LATTER SCINTILLATOR HAS HIGHER DETECTION EFFICIENCY FOR GAMMARAYS WITH ENERGY BETWEEN 35-300keV COMPARED WITH ZnA (Ag). TWO DIFFERENT DISTRIBUTIONS GIVE THE INFORMATION ON THE ENERGY DISTRIBUTION OF GAMMMA-RAYS
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