Published December 1999 | Version v1
Journal article Metadata-only

Radioactive iodine waste (5) I-129 fixation by silica-coated zeolite distributed in extremely low solubility non-organic matrix-multi-layered distributed waste-form for I-129

Creators

  • 1. Kobe Shipyard and Machinery Works, Mitsubishi Heavy Industries Ltd., Kobe, Hyogo (Japan)
  • 2. Nagasaki Research and Development Center, Mitsubishi Heavy Industries Ltd., Ngasaki (Japan)
  • 3. Omiya Research adn Development Department, Nuclear Development Corporation, Saitama (Japan)
  • 4. Computer Software Development Co., Ltd., Tokyo (Japan)
  • 5. Nuclear Systems Engineering Center, Mitsubishi Heavy Industries Ltd., Yokohama, Kanagawa (Japan)

Description

A multi-layered distributed waste-form concept for I-129 fixation has been proposed and experiments have been carried out in order to select iodine-bearing adsorbents. The goal of this waste-form development is to realize a very low releasing rate of I-129 for a long period of more than hundred thousands years. The waste-form consists of iodine-bearing zeolite particles and extremely low solubility matrix such as apatite. With a screening test of inorganic iodine adsorbents, Ca-Ag-A type zeolite (Ag exchange rate: 20%) was selected as a suitable iodine-bearing adsorbent. (author)

Additional details

Publishing Information

Journal Title
Genshiryoku Bakkuendo Kenkyu
Journal Volume
6
Journal Issue
1
Journal Page Range
p. 67-69
ISSN
1343-4446

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
31020216
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Descriptors DEI
ADSORBENTS; APATITES; COATINGS; DISTRIBUTION; IODINE; IODINE 129; LAYERS; LEACHING; RADIOACTIVE WASTE DISPOSAL; RADIOACTIVE WASTE PROCESSING; SILICON OXIDES; SOLUBILITY; ZEOLITES
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHALCOGENIDES; DISSOLUTION; ELEMENTS; HALOGENS; INORGANIC ION EXCHANGERS; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IODINE ISOTOPES; ION EXCHANGE MATERIALS; ISOTOPES; MANAGEMENT; MATERIALS; MINERALS; NONMETALS; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; PHOSPHATE MINERALS; PROCESSING; RADIOISOTOPES; SEPARATION PROCESSES; SILICATE MINERALS; SILICON COMPOUNDS; WASTE DISPOSAL; WASTE MANAGEMENT; WASTE PROCESSING; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
1 ref., 4 figs.