Abstract
Diffractometer for residual stress analysis, called RESA, was installed in JRR-3 (Japan Research Reactor No.3) guide hall at JAERI (Japan Atomic Energy Research Institute, now JAEA: Japan Atomic Energy Agency) in 1993 to perform the fundamental studies on the materials engineering. Recently, not only academic users but also industrial users are interested in using the neutron stress measurement technique for ensuring the reliability of mechanical components, and the number of such users is rapidly increasing year by year. To respond to the increase of users of the RESA, the RESA has been upgraded to improve efficiency and versatility of stress measurement, and another neutron diffractometer, RESA-2, has been installed at T2-3-2 beam port in JRR-3 guide hail as well. In this paper, the current status of the RESA-1 and the RESA-2 was introduced.
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