Title:
RADIATION SHIELDING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2006/103793
Kind Code:
A1
Abstract:
This invention provides a radiation shielding material that has heat resistance and acid resistance as a shielding material in a radiation field, in which neutron and gamma rays are present together, for example, in nuclear facilities, and, at the same time, is lightweight and has low radioactive properties. A heavy metal having a high level of shielding effect against high energy neutron and gamma rays is used in combination with a naturally occurring porous siliceous material having a high hydrogen element content and possessing a high neutron shielding effect and a thermal neutron absorbent to provide shielding effect against both neutron and gamma rays. The mixing ratio of the heavy metal and the thermal neutron absorbent to the porous siliceous material is regulated to properly control the neutron shielding efficiency and the gamma ray shielding efficiency. This construction can provide a radiation shielding material that can realize the highest shielding effect as a practical shielding material, for example, in facilities utilizing fission radiation sources such as atomic reactors.
Inventors:
MURAKAMI HIDEKI (JP)
ODANO NAOTERU (JP)
OKUTA HIROAKI (JP)
ODANO NAOTERU (JP)
OKUTA HIROAKI (JP)
Application Number:
PCT/JP2005/012460
Publication Date:
October 05, 2006
Filing Date:
July 06, 2005
Export Citation:
Assignee:
CHUO SILIKA CO LTD (JP)
NAT MARITIME RES INST (JP)
MURAKAMI HIDEKI (JP)
ODANO NAOTERU (JP)
OKUTA HIROAKI (JP)
NAT MARITIME RES INST (JP)
MURAKAMI HIDEKI (JP)
ODANO NAOTERU (JP)
OKUTA HIROAKI (JP)
International Classes:
G21F1/02
Foreign References:
| JPS6161099A | 1986-03-28 | |||
| JPH09281287A | 1997-10-31 | |||
| JP2001264488A | 2001-09-26 | |||
| JPS57207896A | 1982-12-20 |
Attorney, Agent or Firm:
Kumagai, Shigeru (Akita-city, Akita, JP)
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