EP 2693443 A2 20140205 - Method of disposal of radioactive waste in "synthetic rock"
Title (en)
Method of disposal of radioactive waste in "synthetic rock"
Title (de)
Methode der Entsorgung radioaktiver Abfälle in "synthetischem Gestein"
Title (fr)
Méthode de traitement des déchets radioactifs dans une « roche synthétique »
Publication
Application
Priority
PL 40023512 A 20120803
Abstract (en)
The invention relates to the disposal of radioactive waste by a modified sol-gel method by enclosing it in durable ceramic crystallographic structures of ceramic synroc materials of type perovskite. The method according to the invention lies in the fact that to the previously prepared chlorine-free solution of colloidal sol, preferably Ti(NO 3 ) 4 , the complexing compound is added, preferably ascorbic acid ASC, relative to the sum of the moles of metal from 0.1 to 0.3 and introduces calcium carbonate and elements included in the high-level radioactive waste, in the form of carbonates or nitrates, especially strontium, cobalt, cesium and neodymium, in a molar ratio of from 2% to 14% of the individual metals (Me), thereby replacing from 2% to 14% by mol of introduced Ca 2+ .The thus obtained sol is evaporated, dried and subjected to heat treatment and is eventually subjected to XRD and IR analysis, then the precursor of the synroc is pelletized and calcined at a temperature of 1200°C for 2h.
IPC 8 full level
G21F 9/16 (2006.01); G21F 9/30 (2006.01); G21F 9/34 (2006.01)
CPC (source: EP)
G21F 9/162 (2013.01); G21F 9/301 (2013.01); G21F 9/34 (2013.01)
Citation (applicant)
- PL 198039 A1 19770926 - POMORSK Z APP EL
- PL 172618 B1 19971031 - INST FIZIKI JADROWEJ [PL]
- A.E. RINGWOOD: "Safe Immobilization of High Level Nuclear Wastes", 1978, AUSTRALIAN NATIONAL UNIVERSITY PRESS
- A. E. RINGWOOD: "Immobilization of Radioactive Wastes in SYNROC", vol. 70, 1982, AMERICAN SCIENTIST, pages: 201 - 207
- A.E. RINGWOOD; V.M. OVERSBY; S.E. KESSON; W. SINCLAIR; N. WARE; W. HIBBERSON; A. MAJOR: "Immobilization of high-level nuclear reactor wastes in SYNROC: A current appraisal", NUCLEAR AND CHEMICAL WASTE MANAGEMENT, vol. 2, no. 4, 1981, pages 287 - 305, XP055178468, DOI: doi:10.1016/0191-815X(81)90055-3
- A DEPTULA; J. CHWASTOWSKA; W. LADA; T. OLCZAK; D.WAWSZCZAK; E. STERLINSKA; B. SARTOWSKA; K. C. GORETTA: "Sol-Gel-Derived Hydroxyapatite and Its Application to Sorption of Heavy Metals", ADV. SCI. TECHNOL., vol. 45, 2006, pages 2198 - 2203
- A DEPTULA; W. LADA; T. OLCZAK; D. WAWSZCZAK; M. BRYKALA; F. ZAZA; K. C. GORETTA: "Novel Sol-Gel Synthesis of LiMn204 and LiNixCo1-x02 Powders", ADV. SCI. TECHNOL., vol. 63, 2010, pages 14 - 23
- A DEPTULA; K. C. GORETTA; T. OLCZAK; W. LADA; A. G. CHMIELEWSKI; U. JAKUBASZEK; B. SARTOWSKA; C. ALVANI; S. CASADIO; V. CONTINI, PREPARATION OF TITANIUM OXIDE AND METAL TITANATES AS POWDERS
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2693443 A2 20140205; EP 2693443 A3 20150429; EP 2693443 B1 20170111; PL 223603 B1 20161031; PL 400235 A1 20140217
DOCDB simple family (application)
EP 13176463 A 20130715; PL 40023512 A 20120803