Chemical species of iodine during sorption by activated carbon; Effects of original chemical species and fulvic acids

Kato, Tomoaki; Kozai, Naofumi; Tanaka, Kazuya; Kaplan, D. I.*; Utsunomiya, Satoshi*; Onuki, Toshihiko

Journal of Nuclear Science and Technology, 59(5), p.580 - 589, 2022/05

https://doi.org/10.1080/00223131.2021.1993370

This study reports the effect of fulvic acids, which is a natural organic substance generally contained in groundwater, on the oxidation states of radioactive iodine anions (iodide and iodate). Iodide and iodate are contained in the contaminated water of the Fukushima Daiichi Nuclear Power Plant and supposed to be removed by activated carbon (AC) via adsorption. When fulvic acids does not exist in the experimental system, the adsorption of iodide on AC was less than that of iodate and their oxidation states after the adsorption were not changed. When fulvic acids existed, a fraction of the adsorbed iodate was reduced to iodide. This result indicates that the reduction of the adsorbed iodate progresses during the storage of the spent AC.

Plutonium removing test from unpurified urainum solution in JRTF

Kawachi, Akinori; ; Miyajima, Kazutoshi

JAERI-Tech 99-028, 51 Pages, 1999/03

JAERI-Tech-99-028.pdf:2.13MB

no abstracts in English

Study on optimization of FFD/FFDL system and RTCB plant operation; Thechnique of collecting fission gas using the cover gas cleanup system in JOYOs

Sumino, Kozo; Aoyama, Takafumi; Nagai, Akinori

PNC TN9410 96-216, 85 Pages, 1996/07

PNC-TN9410-96-216.pdf:3.26MB

The cover gas radioactivity in the reactor vessel increases when a fuel pin failure occurs or RTCB (Run to Cladding Breach) testing is performed. The activity must be reduced to minimize the personnel exposure and to maintain the reserve capacity of the waste gas system in which the residual fission gas is stored. The CGCS (Cover Gas Cleanup System) was installed in the JOYO primary cover gas system to collect and remove the fission gas. The cryogenic charcoal bed cooled by the liquid nitrogen selectively adsorbs the krypton and xenon due to the adsorption ratio difference. The collection ratio for xenon and krypton was measured using fission gas in the fuel failure simulation test and a standard helium diluted non-radioactive gas. As a result, the collection ratio was confirmed to be more than 90% for xenon and more than 80% for krypton by six hours operation of CGCS. It was confirmed that the CGCS has a capability to remove the fission gas effectively.

None

Kurosawa, Ryuhei*

PNC TJ1615 96-002, 38 Pages, 1996/03

PNC-TJ1615-96-002.pdf:0.84MB

None

None

; Nemoto, Takeshi; Numata, Koji; ; *; *; Hanawa, Eiji*

PNC TN8440 95-019, 22 Pages, 1995/04

PNC-TN8440-95-019.pdf:0.83MB

None

Sewage treatment technologies by electron beams

JAERI-Research 95-006, 65 Pages, 1995/02

JAERI-Research-95-006.pdf:2.58MB

no abstracts in English

Study on regeneration of activated carbon by means of electron radiation (in Chinese)

G.Zhu*; Arai, Hidehiko; Hosono, Masakazu

J. Radiat. Res. Radiat. Process., 9(1), p.54 - 58, 1991/02

no abstracts in English

Separation of technetium with active carbon

; Kubota, Masumitsu

Journal of Nuclear Science and Technology, 26(11), p.1038 - 1044, 1989/11

https://doi.org/10.3327/jnst.26.1038

no abstracts in English

Development of Removal Methods of Radioactive Ruthenium by Mixture Column of Cell Materials

Motoki, Ryozo

JAERI-M 84-153, 26 Pages, 1984/09

JAERI-M-84-153.pdf:0.99MB

no abstracts in English

Storage krypton-85 by adsorption method

Yamamoto, Tadatoshi; ;

Journal of Nuclear Science and Technology, 21(5), p.372 - 380, 1984/00

https://doi.org/10.3327/jnst.21.372

no abstracts in English