A FTIR/chemometrics approach to characterize the gamma radiation effects on iodine/epoxy-paint interactions in Nuclear Power Plants

Abstract

The effects of radiation on polymeric materials are a topic of concern in a wide range of industries including the sterilization, and the nuclear power industry. While much work has concentrated on systems like polyolefins that are radiation sterilized, some work has been done on epoxy systems. The epoxy system studied is an epoxy/amine paint which is representative of the paint that covers the inner surfaces of the French nuclear reactor containment buildings. In case of a severe accident on a Nuclear Power Plant, fission products can be released from the nuclear fuel to the reactor containment building. Among them, volatile iodine (I) can be produced and can interact with the epoxy-paint. This paint is also subjected to gamma radiation damages (due to the high dose in the containment coming from radionuclides released from the fuel). So the epoxy-paint studied was exposed to gamma radiation under air atmosphere after being loaded with I or not. The aim of this study is to characterize by FTIR spectroscopy the iodine-paint interactions, then to identify the radiation damages on the epoxy-paint, and to check their effects on these iodine-paint interactions. This work shows the potential of multi-block analysis method (ANOVA-PCA and COMDIM = AComDim) for such a study as it allows to identify the nature of iodine/epoxy-paint interactions and to characterize the gamma radiation damages on the epoxy-paint. AComDim method conduces to the extraction of Common Components to different tables and highlights factors of influence and their interactions.

Improving Thermal Stability of Polyurethane through the Addition of Hyperbranched Polysiloxane

“…FPDMS was formed after a ring opening reaction. On the spectra, we observed the disappearance of the oxirane ring and the appearance of a C-O characteristic absorption peak at 1107 cm -1 [15]. These results revealed that the ring opening reaction was successful.…”

“…As shown in Fig. 3, the characteristic absorption peak of CH2 stretching on the APTS spectrum appeared at 3050-2800 cm -1 [15,20], and those of N-H, Si-O-C, and Si-OEt were at 1640-1550 cm -1 [21][22], 1200-1000 cm -1 [23], and 1180 cm -1 [24], respectively. Moreover, the characteristic absorption peak of the oxirane ring group on the GPTS spectrum was at 910 cm -1 [13][14].…”

Effects of variation of steric repulsion between multiwall carbon nanotubes and anionic surfactant in epoxy nanocomposites

“…A peak was found at 1730 cm −1 for CO stretching vibrations as an outcome of the solvent effect. Additionally, the new peak observed at 1600 cm −1 was probably due to CC stretching . A peak was found at 1640 cm −1 for the CC bond of benzene rings in LABSA .…”

“…Additionally, the new peak observed at 1600 cm −1 was probably due to C C stretching. 33 A peak was found at 1640 cm −1 for the C C bond of benzene rings in LABSA. 33 The signal at 1040 cm −1 indicates the S O bond of the sulfonic groups of LABSA.…”

Improving Thermal Stability of Polyurethane through the Addition of Hyperbranched Polysiloxane

“…FPDMS was formed after a ring opening reaction. In the spectra, we observed the disappearance of the oxirane ring and the appearance of a C-O characteristic absorption peak at 1107 cm −1 [16]. These results reveal that the ring opening reaction was successful.…”