Experimentation Building for Backend Technology Development

◎ Purpose of the facility

　　The facility was established to analyze samples of low-level radioactive waste generated in the JAEA for their disposal.

◎ Completion year of construction

1971	The facility  was constructed as an attached facility “Dump condenser building”  of the Japan Power Demonstration Reactor(JPDR).
1996	The name of the facility was changed into "Experimentation Building for Backend Technology Development" due to the change of its purpose after the decommissioning of the JPDR.

◎ Features of the facility

　　The facility is granted licenses to use nuclear fuel materials and radioisotopes.
Hoods and various measuring instruments are installed in the facility for radioactivity measurements of alpha-, beta-, and gamma-rays emitting radionuclides and the chemical analysis. 

◎ Equipment

　　The facility was designed for the usage of nuclear fuel materials and radioisotopes include the following:

Hoods	13 units
Multiple gamma-ray detection instrument	1 unit
Ge semiconductor detector （gamma-rays detector）	3 units
Beta-ray spectrometer （pico-beta）	1 unit
Liquid scintillation counter （Beta-rays detector）	2 units
Gas-flow counter （Alpha/Beta-rays detector）	2 units
Si semiconductor detector （Alpha-rays detector）	12 units
Inductively-Coupled Plasma Mass Spectrometer（ICP-MS）	2 units
Inductively Coupled Plasma-Atomic Emission Spectrometry （ICP-AES）	1 unit

◎ R&D activities

　　In order to establish the rational radioactivity concentration evaluation methods for  low-level radioactive wastes which are generated  from research facilities , we are developing simple and rapid  analytical methods of radionuclides in the wastes, and analyzing various waste  samples and preparing radioactivity data base.
　We analyze various samples collected in the site of Fukushima Daiichi Nuclear Power Plant .  The obtained data can contribute to the establishment of treatment and  disposal methods for various radioactive wastes generated from its accident on March 11, 2011.