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 ...
英字タイトル:
Performance evaluation of EPDM at elevated temperature