We are (PWR) about to start zinc injection on both units. Got the pieces parts installed.
Dose will go up and then down and then up and then down towards a lower equillibrium, but the crappiest part for chemistry is all the new analytical equipment that was purchased to measure the zinc et al. Many many tens of thousands in capital for the new wam-o-dyne Ion Chromotagraphy systems plus all the man hours setting it up, QC/QA checks, training, etc etc etc ad NAUSEAUM.
Hopefully the fuel savings (is this the reason: better fuel life?) will make up for the capital expenditure and labor costs.
Maybe a lurking nuclear fuels financial analyst has a bead on this.