Measurement of U Doppler Effect using various samples in FCA XVII-1

Ando, Masaki; Okajima, Shigeaki; Oigawa, Hiroyuki

JAERI-Research 2001-017, 20 Pages, 2001/03

JAERI-Research-2001-017.pdf:0.82MB

U Doppler effect measurements were carried out using 6 uranium samples with various composition or diameter varying self-shielding factors of U. Calculation accuracy of the standard analysis method for fast reactor cores at FCA was investigated.The Doppler effect were measured by the sample-heated and reactivity worth measurement method up to 800 degree in the FCA XVII-1 assembly, which simulated Na-cooled MOX fueled FBR. In the analysis, the Doppler effect was calculated using the effective cross sections obtained by the PEACO-X code. The calculated values based on the diffusion theory agreed well with the experiment for the U-metal and UO samples. The calculation underestimated the experiment from 10% to 30% for the UO samples containing BeO. This underestimation was improved by the use of the transport calculation. The calculation, however, underestimated about 20% for the sample whose background cross section is greater than 300 barns.

High temperature Doppler effect experiment for U at FCA, I; Reactivity worth measurement with a small heated sample up to 1500C

Okajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko; Ando, Masaki

Journal of Nuclear Science and Technology, 33(3), p.202 - 210, 1996/03

https://doi.org/10.3327/jnst.33.202

no abstracts in English

Resonance interaction effect between hot sample and cold core in analysis of Doppler effect measurement

Okajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko

Journal of Nuclear Science and Technology, 31(10), p.1097 - 1104, 1994/10

https://doi.org/10.3327/jnst.31.1097

no abstracts in English