改良 EPDM 材料の高温環境特性の評価について
Performance evaluation of EPDM at elevated temperature
著者:
杉村 卓哉 Takuya SUGIMURA 松田 真一 Shinichi MATSUDA 鈴木 憲 Ken SUZUKI 堤 裕介 Yusuke TSUTSUMI
発刊日:
公開日:
Compression set testEPDMPCVRadiationSealSevere accidentSteam
概要
In Japanese BWR utilities, silicone rubber(VMQ) or fluoro rubber(FKM) has been used as a sealing material for the PCV upper flange and so on. However, these materials are not suitable for such use under the combined conditions of high-temperature steam and high-radiation dose by severe accident, so there is a possibility to reduce the sealing function that leads to a PCV flange leakage. Therefore, in the BWR plant owners recently decided to adopt an “improved EPDM“ which has excellent characteristics against high-temperature and high-radiation emission conditions as the sealing material for the PCV upper flange. In this paper, we explain the result of the compression set test and the leakage test using a small flange simulating the actual PCV upper flange under high temperature condition up to 300°C.
