Treatment of waste oil with steam reforming system 2018

Sakashita, Koichi; Ishii, Naoyuki; Kijima, Jun; Aoyagi, Yoshitaka; Hagiwara, Masayoshi; Fukushima, Mineo

JAEA-Testing 2020-003, 20 Pages, 2020/07

JAEA-Testing-2020-003.pdf:1.52MB

Steam reforming method has been developed for the treatment of organic wastes which are not suitable materials (halogenated oil) for the incineration. This method consists of the gasification process in which organics are vaporized and decomposed with superheated steam and the oxidation process in which vaporized organics are decomposed by oxidizing reaction with heated air. In the gasification process, nonvolatile radionuclides are separated from vaporized waste. Therefore it can be expected that treatment of liquid waste generated from an off-gas treatment system and maintenance operation of the off-gas treatment system become easy to perform. 1,500L of waste oil contaminated with halogen, solvent and uranium was treated using the demonstration scale steam reforming system to examine the performance of the system in 2018. Results obtained this study were as follows; (1) The temperature in the steam reforming system was controlled under the self-regulation temperature. (2) The concentration of CO and NO in the off-gas were controlled less than 100 ppm and 250 ppm respectively. (3) The gasification ratio of waste oil was more than 99%. (4) Concentration of fluorine oil in waste oil is needed to be less than 20wt% to perform stable continuance treatment.

Azimuthal correlations of electrons from heavy-flavor decay with hadrons in and Au+Au collisions at = 200 GeV

Adare, A.*; Afanasiev, S.*; Aidala, C.*; Ajitanand, N. N.*; Akiba, Yasuyuki*; Al-Bataineh, H.*; Alexander, J.*; Aoki, Kazuya*; Aphecetche, L.*; Aramaki, Y.*; et al.

Physical Review C, 83(4), p.044912_1 - 044912_16, 2011/04

https://doi.org/10.1103/PhysRevC.83.044912

Measurements of electrons from the decay of open-heavy-flavor mesons have shown that the yields are suppressed in Au+Au collisions compared to expectations from binary-scaled collisions. Here we extend these studies to two particle correlations where one particle is an electron from the decay of a heavy flavor meson and the other is a charged hadron from either the decay of the heavy meson or from jet fragmentation. These measurements provide more detailed information about the interaction between heavy quarks and the quark-gluon matter. We find the away-side-jet shape and yield to be modified in Au+Au collisions compared to collisions.

Study of mixture ratio of incombustible fluorine oil treatment with steam reforming system; For stable treatment of radioactive waste oil

Kanda, Naoyuki; Hagiwara, Masayoshi; Sakashita, Koichi; Kijima, Jun

no journal, , 

no abstracts in English

Calculation for radioactivity conversion factors of the scintillation gas monitor used for measurement of short-lived gas nuclides produced in the hot cell of MLF at J-PARC

Sakashita, Koichi; Arakawa, Yuto; Kasugai, Yoshimi; Ishii, Tetsuro

no journal, , 

Radioactive concentration of short-lived gas nuclides produced via air activation by neutron in the hot-cell was measured using a plastic scintillator gas monitor in Materials and Life Science Experimental Facility at J-PARC. However, conversion factors (CF), the ratio of radioactive concentration to count rate, had been unknown for the short-lived nuclides of C, N and O. Therefore we evaluated them with Monte Carlo method using Geant4. As a result, the CF's were shown to be almost constant in the energy region of -rays emitted from these short-lived nuclides and Ar. Then we adopted the CF of Ar, which is certified by the vendor, as those of the short-lived nuclides.