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Report No.
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Development of MOX powder packaging

Ouchi, Yuichiro ; Kitamura, Takafumi

The Japan Atomic Energy Agency (JAEA) is planning to procure Mixed Oxide (MOX) powder from the Rokkasho Reprocessing Plant (RRP) of the Japan Nuclear Fuel Limited (JNFL), as raw material to fabricate reload-fuel for the prototype fast breeder reactor "MONJU" and the experimental reactor "JOYO" at about 2014. The diameter of MOX storage canister used in RRP is larger than the one used in the Tokai Reprocessing Plant (TRP) of JAEA, and therefore the canister has a large capacity. Because of this, the existing packagings are not to be used and development of new packaging has started in 2002. The design of the packaging needs to comply with the requirements for Type B(U)F package specified in the TS-R-1 of the IAEA safe transport regulations and has targeted to ensure high performance of sub-criticality and obtain an efficient performance for heat release, considering a large amount of plutonium. The design of the package is found to satisfy those requirements. In order to validate the design, a series of prototype tests using a prototype packaging has been conducted: heat convection test, handling test in RRP and regulation tests (9m drop, fire, etc.). In the paper, features of the new packaging and test results are presented.

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