In 2008, a new Multi-Probe Corrosion Monitoring System (MPCMS) was installed in doubleshell
tank 241-AN-102 on the U.S. Department of Energy’s Hanford Site in Washington State.
Developmental design work included laboratory testing in simulated tank 241-AN-102 waste to
evaluate metal performance for installation on the MPCMS as secondary metal reference
electrodes. The MPCMS design includes coupon arrays as well as a wired probe which
facilitates measurement of tank potential as well as corrosion rate using electrical resistance
(ER) sensors. This paper presents the MPCMS design, field data obtained following
installation of the MPCMS in tank 241-AN-102, and a comparison between laboratory potential
data obtained using simulated waste and tank potential data obtained following field
installation.
Keywords: tank potential, electrical resistance, corrosion monitoring, nuclear waste tank
corrosion