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Radiation resistant, decontaminable and sealing jointing compounds for application in nuclear facilities

Technical Report:

Abstract

The sealing jointing compounds applied in practice and already examined for decontaminability will be presented here. Solvent-free sealing compounds, emulsifiable in water, with low molecular epoxy resins as binders, quite a number of curing versions, and little hygroscopic filler mixtures adapted in grain size have been tested with a view to ceramic tile jointing in nuclear facilities. The sealing compounds were examined before and after exposure to gamma irradiation (300 KGy energy dose) for decontaminability, color, gloss and resistance to decontaminants. Out of fourteeen compounds exhaustively investigated ten are very well decontaminable and four well decontaminable. After exposure to radiation no or only minor changes in color and gloss, respectively, were observed. Visible changes such as cracking, bubbles, etc. were not found and the resistance to decontaminants was neither affected. It has even been possible to replace in the well decontaminable sealing compounds developed until now part of the epoxy resin binder with elasticizing components such as Thiokol which is very important as a base material for sealing compounds in the construction industry, but difficult to decontaminate. (orig.). [Deutsch] Es werden die bisher auf Dekontaminierbarkeit geprueften in der Praxis verwendeten Fugendichtungsmassen vorgestellt. Fuer die Verfugung von keramischen Fliesen in kerntechnischen  More>>
Authors:
Publication Date:
Sep 01, 1991
Product Type:
Technical Report
Report Number:
KFK-4894
Reference Number:
SCA: 360605; PA: DEN-92:000155; SN: 92000629773
Resource Relation:
Other Information: PBD: Sep 1991
Subject:
36 MATERIALS SCIENCE; SEALING MATERIALS; DECONTAMINATION; EPOXIDES; RESINS; BINDERS; FILLERS; GAMMA RADIATION; 360605; RADIATION EFFECTS
OSTI ID:
10109395
Research Organizations:
Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Nukleare Entsorgungstechnik
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE92750200; TRN: DE9200155
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
17 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Kunze, S. Radiation resistant, decontaminable and sealing jointing compounds for application in nuclear facilities. Germany: N. p., 1991. Web.
Kunze, S. Radiation resistant, decontaminable and sealing jointing compounds for application in nuclear facilities. Germany.
Kunze, S. 1991. "Radiation resistant, decontaminable and sealing jointing compounds for application in nuclear facilities." Germany.
@misc{etde_10109395,
title = {Radiation resistant, decontaminable and sealing jointing compounds for application in nuclear facilities}
author = {Kunze, S}
abstractNote = {The sealing jointing compounds applied in practice and already examined for decontaminability will be presented here. Solvent-free sealing compounds, emulsifiable in water, with low molecular epoxy resins as binders, quite a number of curing versions, and little hygroscopic filler mixtures adapted in grain size have been tested with a view to ceramic tile jointing in nuclear facilities. The sealing compounds were examined before and after exposure to gamma irradiation (300 KGy energy dose) for decontaminability, color, gloss and resistance to decontaminants. Out of fourteeen compounds exhaustively investigated ten are very well decontaminable and four well decontaminable. After exposure to radiation no or only minor changes in color and gloss, respectively, were observed. Visible changes such as cracking, bubbles, etc. were not found and the resistance to decontaminants was neither affected. It has even been possible to replace in the well decontaminable sealing compounds developed until now part of the epoxy resin binder with elasticizing components such as Thiokol which is very important as a base material for sealing compounds in the construction industry, but difficult to decontaminate. (orig.). [Deutsch] Es werden die bisher auf Dekontaminierbarkeit geprueften in der Praxis verwendeten Fugendichtungsmassen vorgestellt. Fuer die Verfugung von keramischen Fliesen in kerntechnischen Anlagen wurden wasseremulgierbare und loesemittelfreie Dichtungsmassen auf der Bindemittelbasis niedermolekularer Epoxidharze, verschiedenen Aushaertungsvarianten und in der Korngroesse abgestimmten inerter Fuellstoffmischungen getestet. Sie wurden vor und nach der Gammabestrahlung (Energiedosis 300 KGy) auf Dekontaminierbarkeit, Farbe, Glanz und Dekontaminationsmittelbestaendigkeit geprueft. Von 14 abschliessend untersuchten Systemen waren 10 sehr gut und 4 gut dekontaminierbar. Nach der Strahlenbelastung kam es zu keiner oder nur sehr geringer Farb- bzw. Glanzaenderung. Sichtbare Veraenderungen wie Rissbildung, Blasen etc. wurden nicht festgestellt, und die Dekontaminationsmittelbestaendigkeit war auch nicht beeintraechtigt. In den entwickelten sehr gut dekontaminierbaren Dichtungsmassen konnte sogar ein Teil des Bindemittels Epoxidharz durch elastifizierende Komponenten z.B. Thiokol, das im Bauwesen als Grundstoff fuer Dichtungsmassen grosse Bedeutung hat, aber schwer zu dekontaminieren ist, ersetzt werden. (orig.).}
place = {Germany}
year = {1991}
month = {Sep}
}