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Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS

Abstract

Among the materials used for confinement of nuclear wastes of low and medium level activity the epoxyde resins are known as matrices which preserve well their properties in an ionizing environment. This work is dedicated to the investigation of the modifications occurring in molecular structure of these materials as well as of the ion exchange resins they incorporate, irradiated in different conditions. The first part deals with the analysis of a commercial reticulated epoxyde resin submitted to a 2 MGy integral dose gamma irradiation under two different dose rate (51 and 900 Gy/h), and under two different environments (air and water). The results obtained with the techniques providing structure information (time-of-flight mass spectrometry (HSF-SIMS) and FT-IR spectrometry) confirm those obtained by techniques sensible to macroscopic properties of material (DMA, DSC), taking into account that no noticeable irradiation effect can be made evident inside the material. On the other hand, an irradiation carried out in air results in a superficial oxidation, due probably to the action of the air radiolysis products. The preliminary results of an ion irradiation followed by an in-situ HSF-SIMS analysis pointed out to a basic difference between the energy amount transferred by gamma photons and fast ions;  More>>
Authors:
Debre, O [1] 
  1. Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
Publication Date:
Jun 30, 1997
Product Type:
Thesis/Dissertation
Report Number:
LYCEN-T-9743
Reference Number:
SCA: 360605; 052001; PA: AIX-29:040393; EDB-98:083457; SN: 98001989400
Resource Relation:
Other Information: DN: 175 refs.; TH: Theses (Ph.D); PBD: 30 Jun 1997
Subject:
36 MATERIALS SCIENCE; 05 NUCLEAR FUELS; CHEMICAL RADIATION EFFECTS; EPOXIDES; GAMMA RADIATION; ION EXCHANGE; ION EXCHANGE MATERIALS; IONIZING RADIATIONS; IRRADIATION; MASS SPECTROSCOPY; POLYMERS; POST-IRRADIATION EXAMINATION; RADIOACTIVE WASTE PROCESSING; RADIOLYSIS; RESINS; SECONDARY EMISSION
OSTI ID:
660009
Research Organizations:
Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE98629840; TRN: FR9810028040393
Availability:
INIS; OSTI as DE98629840
Submitting Site:
FRN
Size:
134 p.
Announcement Date:

Citation Formats

Debre, O. Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS. France: N. p., 1997. Web.
Debre, O. Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS. France.
Debre, O. 1997. "Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS." France.
@misc{etde_660009,
title = {Effects of ionizing radiations on reticulated polymers associated to nuclear wastes. The HSF-SIMS technique contribution; Effets des radiations ionisantes sur les polymeres reticules associes aux dechets nucleaires. Apport de la technique HSF-SIMS}
author = {Debre, O}
abstractNote = {Among the materials used for confinement of nuclear wastes of low and medium level activity the epoxyde resins are known as matrices which preserve well their properties in an ionizing environment. This work is dedicated to the investigation of the modifications occurring in molecular structure of these materials as well as of the ion exchange resins they incorporate, irradiated in different conditions. The first part deals with the analysis of a commercial reticulated epoxyde resin submitted to a 2 MGy integral dose gamma irradiation under two different dose rate (51 and 900 Gy/h), and under two different environments (air and water). The results obtained with the techniques providing structure information (time-of-flight mass spectrometry (HSF-SIMS) and FT-IR spectrometry) confirm those obtained by techniques sensible to macroscopic properties of material (DMA, DSC), taking into account that no noticeable irradiation effect can be made evident inside the material. On the other hand, an irradiation carried out in air results in a superficial oxidation, due probably to the action of the air radiolysis products. The preliminary results of an ion irradiation followed by an in-situ HSF-SIMS analysis pointed out to a basic difference between the energy amount transferred by gamma photons and fast ions; the last ones being able to induce scissions of the nearby liaisons in the material. The second part of this work is concerned with the ion exchange resins of the type PS-DVB saturated in water and non-active ions, simulating real wastes, irradiated in the same conditions as the epoxyde resins. In contrast to the results on the last one, it appears that the irradiation of these materials results primarily in scissions of the functional groups on which the ions are attached. In addition to this finding it appears that the role of water as carrying outward the attached ions appears to be fundamental 175 refs.}
place = {France}
year = {1997}
month = {Jun}
}