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Report No.
 - 

Dose evaluation for fuel transient test

Iimura, Koichi ; Ogawa, Mitsuhiro; Tomita, Kenji; Tobita, Masahiro

The preparation of a fuel transient test using the JMTR is advanced to conduct its irradiation test from 2011 F.Y. after re-operation of the JMTR. The fuel behavior for high burn-up BWR's under power ramping condition will be evaluated in simulating the BWR environmental condition using the shroud irradiation facility (Oarai Shroud Facility No.1) and $$^{3}$$He power-control type BOCA (Boiling Water Capsule) irradiation facility, which is composed of the capsule control device, $$^{3}$$He power-control device and boiling water capsule. In order to change the fuel irradiation conditions so as to treat high burn-up fuels (from 50 GWD/t-UO$$_{2}$$ to 110 GWD/t-U), it is necessary to revaluate the dose for the safety evaluation at the test fuel failure. In this report, evaluations for equivalent dose rate of each device and exposure dose of handling operators when all fission products released in the coolant of the capsule control device and the BOCA at fuel failure in the fuel transient test are summarized.

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