PERFORMANCE OF A POLYMER SEALANT COATING IN AN ARCTIC MARINE ENVIRONMENT. Page: 2 of 9
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THE TECHNOLOGY AND THE SPECIFICATIONS
The technology selected for this task derived from the interest expressed the Russian Federation's
Northern Navy in preventing permanent contamination of structural materials (such as concrete
and steel) during the handling, processing and storage of radioactive wastes. Such contamination
poses several problems, such as increases in worker exposures, and processing and disposal cost
at the end of the life of these materials. The most promising solution appeared to lie in the use of
a polymer-based sealant, so the decision was made to focus on demonstrating the viability of
such a coating when deposited on concrete and metals surfaces exposed to the environmental and
working conditions found at the RF Northern Navy bases. These are located mostly in the
Murmansk region in northwest Russia,.inside the Arctic Circle. The conditions in this region
dictated that the coating should be applied during the relatively mild weather of the summer in
that region (high temperatures usually in the range 10-15 C).
The first steps involved the preparation of a set of technical specifications and identification of a
suitable supplier for the equipment and sealant material. The specifications assembled by the
Russian Navy personnel are summarized in Table I.
Table I. Equipment and Sealant Specifications
* Must be a stand-alone unit " Must be resistant to a marine environment
" Must be mobile " Must be resistant to Arctic temperatures
" Must have own power supplies " Must be resistant to acids, bases, organic
* Must be resistant to permanent contamination
" Must be easily decontaminated
" Must have flammability resistance
The requirement that the equipment be both mobile and self-sufficient was critical because it was
likely that it would be used in places where utilities such as electricity and compressed air were
not readily available. The sealant requirements were commensurate with those that might be
expected for use in any solid radioactive waste handling facility located within the Arctic Circle.
With regard to the sealant, enough material was to be supplied to cover an area of at least 1500
m2 to a thickness deemed sufficient to meet the needs of the application (2 to 3 mm, depending
on the substrate). The selected vendor was also required to provide equipment manuals in
Russian and to train Russian personnel in the use of the equipment.
TECHNOLOGY DESCRIPTION AND DEMONSTRATION PLAN
Promatec Technologies, Cypress, TX, was contracted to supply the specified equipment and
sealant materials. The Promatec technology uses an airless spray system to deposit coatings of a
polymer named Polibrid 705 . The process involves preheating two components, a resin and a
catalyst (called Compounds A and B), using a hydraulic system to pump them to a mixer
manifold, then spraying the resultant mixture onto the object surface. Polibrid 705 coatings have
the advantage that they cure (harden) very rapidly and can be put into use within a very short
time of being applied. This quick-setting ability also means that, at the conclusion of each
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MOSKOWITZ,P.; COWGILL,M.; GRIFFITH,A.; CHERNAENKO,L.; DIASHEV,A. & NAZARIAN,A. PERFORMANCE OF A POLYMER SEALANT COATING IN AN ARCTIC MARINE ENVIRONMENT., article, February 25, 2001; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc723336/m1/2/: accessed April 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.