Measurements of neutron capture cross-section for nuclides of interest in decommissioning (II); Fe(n,)Fe

廃止措置に係る核種の中性子捕獲断面積測定,II; Fe(n,)Fe

中村 詔司  ; 芝原 雄司*; 遠藤 駿典   ; Rovira Leveroni, G.   ; 木村 敦   

Nakamura, Shoji; Shibahara, Yuji*; Endo, Shunsuke; Rovira Leveroni, G.; Kimura, Atsushi

As nuclear facilities are dismantled in decommissioning, large amount of various waste is generated. Even more inconveniently, waste is radioactive due to neutron activation. Thus, the neutron capture cross-sections of nuclides targeted in decommissioning are required to evaluate the radioactivity produced. In this work, Fe nuclide was selected among objective nuclides for decommissioning, and its thermal-neutron capture cross-section was measured by a neutron activation method at the graphite thermal column of Kyoto University Research Reactor in 5-MW operation. The thermal-neutron capture cross-section was derived using s convention. The present work obtained 1.360.03 barns for the Fe(n,)Fe reaction. The present result supports the JENDL-5 evaluation within 2. If updated with currently recommended nuclear data, some of the reported past data would support the present result.