Analytical data on contaminated water, rubble and other collected at the Fukushima Daiichi Nuclear Power Station

Asami, Makoto*; Takahatake, Yoko; Myodo, Masato; Tobita, Takeshi; Kobayashi, Kiwami; Hayakawa, Misa; Usui, Yuka; Watahiki, Hiromi; Shibata, Atsuhiro; Nomura, Kazunori; et al.

JAEA-Data/Code 2017-001, 78 Pages, 2017/03

JAEA-Data-Code-2017-001.pdf:4.92MB
JAEA-Data-Code-2017-001-appendix(DVD-ROM).zip:818.06MB

At Fukushima Daiichi Nuclear Power Station owned by Tokyo Electric Power Company Holdings, Incorporated (TEPCO), contaminated water (accumulated, treated) secondary waste from water treatment, rubble and soil were collected and analyzed. The data already opened to public was collected as this report. The analytical data reported by TEPCO, Japan Atomic Energy Agency and International Research Institute for Nuclear Decommissioning until the end of March, 2016, was collected. Information on the samples and values of radioactive nuclide concentration and others were tabulated, besides figures, which show change in radioactive nuclide concentration for major nuclides, are contained. And, English translation and the collected data are provided as electric data.

Development of a radioactive gas monitor using plastic scintillation fibers

Nozaki, Tatsuo; Torii, Tatsuo; Takada, Chie; Tobita, Kazunori; Ando, Hideki

PNC TN9410 96-262, 96 Pages, 1996/09

PNC-TN9410-96-262.pdf:3.27MB

The basic research on large electron linear accelerator is under current investigation at Quantum Technology Development Facility in O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation. The result of this, the transmutation of fission products would be incorporated In the future demonstrative stage of the transmission of fission products, Nitrogen-13 and Oxygen-15 will be produced by the interaction between high energy bremsstrahlung and air during operation of the linac. The detection limits of conventional monitors are not sufficient for the limits of the concentration of Nitrogen-13 (610 Bq/cm) and Oxygen-15 (610 Bq/cm) in exhaust air. Therefore we have developed a new type of gas monitor detector that is packed with plastic scintillation fibers as the detection elements to detect the limits of concentration of Nitrogen-13 and Oxygen-15 in exhaust air. On designing the gas monitor detectors, the sensitivities of the detectors were simulated to optimize the shape and the volume of detector by using EGS4, the Monte-Carlo code for electrons and photons. Based on the results of the simulations, the detectors were composed and the characteristic examinations of sensitivities were carried out by using beta-ray checking sources and Krypton-85 gas. Main points are as follows : (1) The detection limit of the developed torus-type detector for Krypton-85 is 5.410 Bq/cm based on the results of the experiments. (2) The counting efficiency of a detector for Nitrogen-13 is 40 percent higher than the counting efficiency for Krypton-85 based on the results of simulations. This indicates that the detection limit of the detector for Nitrogen-13 is about 3.9 10 Bq/cm. (3) The beta-ray energy of Oxygen-15 is higher than the beta-ray energy of Nitrogen-13. This theoretically reaches the conclusion that the detection limit of the detector for Oxygen-15 is lower than the ...

Determination of technetium-99 in environmental samples by inductively coupled plasma mass spectrometry

Morita, Shigemitsu; Tobita, Kazunori; Kurabayashi, Mizumi

Topical symposium on the behavior and utilization of technetium, 0 Pages, 1993/00

None

緊急呼出パネルおよび緊急通信システム

山本 雄三; 飛田 和則

高橋 克彦*; 引間 隆文*

JP, 2004-232073  Patent licensing information  Patent publication (In Japanese)

【課題】緊急通信システムのエマージェンシーコールサーバをボタン操作だけで迅速に簡単に制御できる緊急呼出パネル、およびエマージェンシーコールサーバと緊急呼出パネルからなる緊急通信システムを提供する。 【解決手段】 緊急呼出パネルは緊急通信システムのコールサーバで通報される定型通報に対応するように予め割り当て可能な通報ボタンと、通報ボタンが定型通報に応じて選択された状態で、選択された定型通報のデータをコールサーバに送る送信ボタンとを有する。 緊急通信システムはコールサーバと該コールサーバの通報処理を実行させるための緊急呼出パネルからなり、緊急呼出パネルで、通報内容により定型通報に対応して通報ボタンを選択して、選択した定型通報のデータを含む開始要求データをコールサーバに送り、コールサーバで、開始要求データを取得したとき、通報処理を実行する。