検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Kinetic parameter $$beta_{rm eff}/ell$$ measurement on low enriched uranyl nitrate solution with single unit cores (600$$phi$$, 280T, 800$$phi$$) of STACY

STACY単一炉心(600$$phi$$, 280T, 800$$phi$$)における低濃縮硝酸ウラニル水溶液の動特性パラメータ$$beta_{rm eff}/ell$$の測定

外池 幸太郎; 三好 慶典; 菊地 司*; 山本 俊弘

Tonoike, Kotaro; Miyoshi, Yoshinori; Kikuchi, Tsukasa*; Yamamoto, Toshihiro

STACYにおいて、低濃縮硝酸ウラニル水溶液の動特性パラメータ$$beta_{rm eff}/ell$$を、パルス中性子法により測定した。ウラン濃度を193.7gU/$$ell$$から432.1gU/$$ell$$の範囲で変化させ、測定を系統的に繰り返した。用いた炉心タンクは、直径600mm及び直径800mmの2基の円筒タンクと、厚さ280mm,幅700mmの平板タンクである。本報告では、溶液燃料条件,臨界液位,測定を行った未臨界液位,測定された中性子束時間減衰の減衰定数,外挿された$$beta_{rm eff}/ell$$などの実験データを、パルス中性子法の説明とともに示す。また、拡散コードであるSRACシステムのCITATIONと核データライブラリJENDL 3.2を用いて、$$beta_{rm eff}/ell$$の計算も行った。これらの$$beta_{rm eff}/ell$$の測定値と計算値はよく一致している。

Kinetic parameter $$beta_{rm eff}/ell$$ of low enriched uranyl nitrate solution was measured by the pulsed neutron source method in the STACY. This measurement was repeated systematically over several uranium concentrations from 193.7 gU/$$ell$$ to 432.1 gU/$$ell$$. Used core tanks were two cylindrical tanks whose diameters are 600 mm and 800 mm and one slab tank which has 280 mm thickness and 700 mm width. In this report, experimental data such as solution conditions, critical solution level for each solution condition, subcritical solution levels where measurements were conducted, measured decay time constants of prompt neutron and extrapolated $$beta_{rm eff}/ell$$ values are described as well as basic principle of the pulsed neutron source method. $$beta_{rm eff}/ell$$ values were evaluated also by computation with the diffusion code CITATION in SRAC and the nuclear data library JENDL 3.2. Both experimental and computational $$beta_{rm eff}/ell$$ values show good agreement.

Access

:

- Accesses

InCites™

:

パーセンタイル:22.52

分野:Nuclear Science & Technology

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.