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The mission of the high burnup rim project (HBRP) is to identify the conditions of the rim structure formation, especially the influence of burnup and temperature, and to investigate material properties and characteristics following the restructuring. The targeted highest burnup is 100 Mwd Kg{-1}u{-1}. Fuel discs of 5 mm diameter were sandwiched between molybdenum discs and assembled in a gas flow rig of IFA-601. Irradiation was started in the Halden reactor (HBWR) at the end of 1993 and completed in May 1996. 4 long rods and 2 short rods constructed the rig. Each long rod was divided into 4 stacks. The irradiation temperatures were monitored by thermocouples attached to the Mo discs and were kept nearly constant. These stacks were irradiated at 4 different axial positions in the Halden reactor and reached 4 different burnups. Two short rods were pressurized by Ar gas of 14 MPa (at room temperature) to evaluate effects of mechanical constraint. After the irradiation the rods were transported to the Institute for Transuranium Elements (ITU) for post irradiation examinations (PIE). This paper reports the first results of the PIE, which verifies attainment of the expected irradiation conditions in the Halden reactor.

Additional information

Authors: KITAJIMA S, Central Research Institute of Electric Power Industry (CRIEPI), Tokyo (JP);MATZKE H, Central Research Institute of Electric Power Industry (CRIEPI), Tokyo (JP);KINOSHITA M, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: Enlarged Halden Meeting Lillehammer (NO), 15-20 March 1998
Availability: Available from (1) as Paper EN 41333 ORA
Record Number: 199810698 / Last updated on: 1998-06-08
Original language: en
Available languages: en
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