Process for the treatment of natural apatites with a view to the

Details Process for the treatment of natural apatites with a view to the Process for the treatment of natural apatites with a view to the

1996-08-26

1997-07-08

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Storage container systems for new and/or irradiated core...

588 16, G21F 5008

Patent

active

056469721

ABSTRACT:
The invention relates to a process for the treatment of natural apatites with a view to the use thereof for storing irradiated fuel elements.
This process consists of contacting a natural apatite powder with an acid aqueous solution, e.g. dilute HNO.sub.3 or HCl for between a few seconds and 10 minutes.
In this way, the physicochemical properties of the natural apatite are improved by modifying its surface composition in order to make it close to that of hydroxyapatite. This modified apatite can be used as a filling material in irradiated fuel element storage containers.

REFERENCES:
patent: 3684435 (1972-08-01), Lepomaa et al.
patent: 3919395 (1975-11-01), Hauge
patent: 4181703 (1980-01-01), Wengeler et al.
patent: 4321158 (1982-03-01), Beall et al.
Calcified Tissue International (1982), "Variability of Hydroxyapatite Preparations", R.A. Young and D. W. Holcomb, pp. S17-S32.
Derwent World Patent Index Abstract No. 76-60486X.
Chemical Abstracts, vol. 86, No. 1, 4 Jan. 1977, Columbus, Ohio USA; Abstract No. 4142w, Kato Yoshito, Fujita Takao, "Treatment of Carbonate Apatite", p. 368.
Chemical Abstrcts, vol. 100, No. 26, 25 Jun. 1984, Columbus, Ohio, USA; Abstract No. 212426b, Treuschenko et al., "Selective Extraction of Pohsphates and Carbonates from Phosphate Ores of the Kingisepp Deposit Using Sulfuric Acid", p. 137.
Database Inspec. Institute of Electrical Engineers, Stevenage, GB, Inspec. No. 2072408, Hebel S. et al., "CEC Research Activities into the Immobilization of Volatile Radionuclides from Reprocessing", & Conditioning of Radioactive Wastes for Storage and Disposal. Proceedings of an International Symposium, Utrecht, Netherlands, 21-25 Jun. 1982, p. 245-251.
Database Inspec. Institute of Electrical Engineers, Stevenage, GB, Inspec. No. 1453245, Krajewski T. et al., "Mineral-Contributed Anion Effects of the Retention of Trivalent Actinides in the Environment", & 25th Annual Meetings of the American Nuclear Society, Atlanta, GA, USA, 3-7 Jun. 1979 ISSN 0003-018X, pp. 168-169.

Affiliated with

Also associated with

Rating

Process for the treatment of natural apatites with a view to the does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the treatment of natural apatites with a view to the, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the treatment of natural apatites with a view to the will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2413154