skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Foam and gel methods for the decontamination of metallic surfaces

Abstract

Decontamination of nuclear facilities is necessary to reduce the radiation field during normal operations and decommissioning of complex equipment. In this invention, we discuss gel and foam based diphosphonic acid (HEDPA) chemical solutions that are unique in that these solutions can be applied at room temperature; provide protection to the base metal for continued applications of the equipment; and reduce the final waste form production to one step. The HEDPA gels and foams are formulated with benign chemicals, including various solvents, such as ionic liquids and reducing and complexing agents such as hydroxamic acids, and formaldehyde sulfoxylate. Gel and foam based HEDPA processes allow for decontamination of difficult to reach surfaces that are unmanageable with traditional aqueous process methods. Also, the gel and foam components are optimized to maximize the dissolution rate and assist in the chemical transformation of the gel and foam to a stable waste form.

Inventors:
;
Publication Date:
Research Org.:
~Individually Owned Patent
Sponsoring Org.:
USDOE
OSTI Identifier:
1176080
Patent Number(s):
7,166,758
Application Number:
11/089,978
Assignee:
Nunez, Luis; Kaminski, Michael Donald OSTI
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Nunez, Luis, and Kaminski, Michael Donald. Foam and gel methods for the decontamination of metallic surfaces. United States: N. p., 2007. Web.
Nunez, Luis, & Kaminski, Michael Donald. Foam and gel methods for the decontamination of metallic surfaces. United States.
Nunez, Luis, and Kaminski, Michael Donald. Tue . "Foam and gel methods for the decontamination of metallic surfaces". United States. doi:. https://www.osti.gov/servlets/purl/1176080.
@article{osti_1176080,
title = {Foam and gel methods for the decontamination of metallic surfaces},
author = {Nunez, Luis and Kaminski, Michael Donald},
abstractNote = {Decontamination of nuclear facilities is necessary to reduce the radiation field during normal operations and decommissioning of complex equipment. In this invention, we discuss gel and foam based diphosphonic acid (HEDPA) chemical solutions that are unique in that these solutions can be applied at room temperature; provide protection to the base metal for continued applications of the equipment; and reduce the final waste form production to one step. The HEDPA gels and foams are formulated with benign chemicals, including various solvents, such as ionic liquids and reducing and complexing agents such as hydroxamic acids, and formaldehyde sulfoxylate. Gel and foam based HEDPA processes allow for decontamination of difficult to reach surfaces that are unmanageable with traditional aqueous process methods. Also, the gel and foam components are optimized to maximize the dissolution rate and assist in the chemical transformation of the gel and foam to a stable waste form.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 23 00:00:00 EST 2007},
month = {Tue Jan 23 00:00:00 EST 2007}
}

Patent:

Save / Share: