ICONE23-1424 DEVELOPMENT OF METHOD OF DRIFT SUPPRESSION FOR PRESSURE TRANSMITTERS CONTAINING PALLADIUM

Abstract

Drift phenomena are caused by gas accumulating in pressure transmitters in nuclear power plants. We found factors contributing to drift were radiolysis of silicone oil as well as hydrogen permeation, as a result of analyzing drift factors. We propose a method of suppressing drift utilizing hydrogen absorptive material. The effects of suppressing drift were evaluated through radiation decomposition experiments. Our proposed pressure transmitter outperformed a conventional pressure transmitter without hydrogen absorption material in the experiments.