検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

On performance experience and measurements with Ningyo Waste Assay System (NWAS)

NWASの導入と測定経験について

在間 直樹; 中島 伸一 ; 金田 弘司; 門 一実

Zaima, Naoki; Nakashima, Shinichi; Kaneda, Koji; Kado, Kazumi

200リットルドラム缶に封入されたウラン廃棄物のNDA測定を中性子及び$$gamma$$線を用いて測定する装置の開発試験を行ったので、その状況を報告する。測定装置は中性子線測定用として16本のヘリウム-3比例計数管と$$gamma$$線測定用として大口径NaI(Tl)シンチレーション検出器を兼ね備えている。種々のマトリックスと異なる化学形・濃縮度のウラン線源を200リットルドラム缶に装荷して試験を行った。1年に渡る試験の結果、装置の特性を把握することができ、近々人形峠環境技術センター製錬転換施設に貯蔵されているウラン廃棄物ドラム缶の測定を開始する予定である。本研究は米国ロスアラモス国立研究所との共同研究に基づくものである。

The uranium mass assay systems for 200-litter wastes drums applied neutron and $$gamma$$ measurements by NDA method had been developed. The measurement systems and trial data are described in this preliminary report. The systems are composed of the 16 pieces of helium-3 proportional counters for neutron detection and a large sized NaI(Tl) scintillation detector for $$gamma$$ ray detection. The extensive testing trials using the calibrated uranium sources with different enrichment and some kinds of matrices in drums were performed. Through the one year testing the useful experiences of this system concerning neutron and $$gamma$$ ray measurements for uranium mass were obtained. Almost all instruments and software were so good performance as is designed. As the next step we are scheduled to try measurements for actual wastes that are stored in the Uranium Refining and Conversion Plant at Ningyo-toge, and put practical uses near future. Our research was accomplished with the support of LANL.

Access

:

- Accesses

[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.