It was found around 1985 in LWR fuel as porosity development at rim of fuel pellets, just at neighbour of inner surface of the cladding. Many fine pores were observed by ceramography of magnification of around 500. At the same time French hot laboratory found reduction of EPMA signal for fission produced Xe at the same rim area.
Later by high resolution, the microscope (SEM) revealed "Cauliflower-like" structure named by Hj. Matzke of ITU, which is similar to complex biological morphology of the vegetable.
However, the first observation of the structure was made and reported in 1960th. In the development program of high burnup core at the Shippingport reactor in US, UO2 specimens were irradiated at low temperature and investigated by electron microprobe with replica method.
HBRP is co-sponsored by CRIEPI, Japanese utilities, Mitsubishi Heavy Industries, Nippon Nuclear Fuel Development Corporation, Nuclear Fuel Industries, Electricite de France, ABB Atom AB, Swedish Nuclear Power Inspectorate and Swedish utilities, Electric Power Research Institute of USA, IFE of Norway, and is carried out in co-operation with IFE and ITU Karlsruhe.
M. Kinoshita, T. Sonoda, S. Kitajima, A. Sasahara, E. Kolstad, Hj. Matzke, V.V. Rondinella, A.D. Stalios, C.T. Walker, I. Ray, M. Sheindlin, D. Halton, C. Ronchi, "High Burnup Rim Project (II) Irradiation and examination to investigate rim-structured fuel," ANS International Topical Meeting on Light Water Reactor Fuel Behavior to be held April 9-13, 2000 in Park City, Utah. (to be presented)
M. Kinoshita, S. Kitajima, T. Kameyama, T. Matsumura, E.Kolstad, Hj. Matzke, "High Burnup Rim Project, progressof irraiation and preliminary analysis," Proceedings, 1997 International Topical Meeting on Light Water Reactor Fuel Performance, Portland, Oregon, March 2-6, 1997, p530-535.
T. Sonoda, Hj. Matzke, M. Kinoshita, "High Burnup Rim Project (IV) Threshold Burnup of Rim Structure Formation," EHPG Meeting, Loen, Norway, May 1999.
S. Kitajima, Hj. Matzke, M. Kinoshita,"High Burnup Rim Project(III) Examinations to@verify attainment of@the target irradiation conditions," EHPG meeting, Lillihammar Norway, March 1998
M. Kinoshita, "High Burnup Rim Project, (II) Progress of Irradiation and Preliminary Analysis," Proceedings of Enlarged HPG Meeting, Loen, Norway, 19th-24 May, 1996., HPR-347, OECD Halden Reactor Project.
M. Kinoshita, T. Matsumura, T. Kameyama, S. Kitajima, E. Kolstad, Hj. Matzke, "High Burnup Rim Project, Irradiation Program to Study Rim Structure Formation, -Outline and Preliminary Analysis -," EHPG meeting, Bolkesjo 10/31-11/4, 1994.
This is still under-construction. We acknowledge here to Daniel Baron (EdF) for the collection.
If you have any information, please E-mail us to make this list better.
E-Mail: moto@criepi.denken.or.jp