B and W/FTI high temperature chemical cleaning process

The B and W/FTI Chemical Cleaning program has a long history marked by many successful field applications. These include development of a magnetite dissolution solvent in the early 1970's, participation in the EPRI/SGOG chemical cleaning process development program, and participation in numerous applications of the EPRI process in PWR reactor units. The B and W/FTI chemical cleaning program also includes the development and qualification of the Bruce and Pickering chemical cleaning processes, and execution of that process on four reactor units at Pickering. The Pickering application included both the EPRI low temperature process and a modified version of the EPRI elevated temperature crevice process. A high temperature cleaning process has also been developed by B and W/FTI for iron-based deposit removal from CANDU and PWR reactor units. It has been successfully applied at two PWR plants. Application of the high temperature iron process is based on plant heat using a reduced process equipment configuration. The paper describes the high temperature B and W/FTI chemical cleaning process, with emphasis on the testing of steam generator tubing materials, and includes a summary of the results of one field application. (author)