The study will focus on periodic evaluation of the piston assembly to characterize the growth of
biofouling. This evaluation can be done through visual inspection and other quantitative methods, such as weighing of the assembly to calculate added biofouling weight. Caliper measurements can also be taken of the inside surface. In depth biofouling analysis can be performed on material coupons periodically. At the end of the test period, the prototype can be deconstructed and all parts analyzed. An integrated load cell can monitor the resistance experienced by the piston. The current of the actuator can also be monitored as a secondary measurement of resistance or friction. Two prototype test articles will be compared, one with a biofouling mitigation seal, and one without. The wear and tear on the main dynamic seal will also compared. This support from PNNL helps meet the Technical Assistance Objectives by providing a controlled environment for evaluating biofouling, which will inform future design improvements and iterations.

This project was supported during RFTS 3.