Bleach and ethanol were both selected because they are commonly used for insecticide decontamination, and bleach is a standard decontamination agent for nerve agent weapons.
After each decontamination, the plates were allowed to dry for 48 hours before the insect bioassay was performed.
The models were used to describe the effects of decontamination on survival (those classified as alive) at 1-hour postexposure and at 24-hours postexposure.
At that time, the remaining plates with coupons received a single decontamination with 5% bleach identical to that described earlier.
Due to the lack of toxicity on these plates, the control throughout the study was subsequently defined as plates that did not receive a malathion application or any decontamination treatment, or that received only a bleach or xylene application.
Equipment outside the PAB supplied decontamination chemicals, clean demineralizer resins, and clean water for sluicing resins.
The plant residual heat removal system (RHRS) was connected to the decontamination skid.
Both modifications then performed as planned during the March 1995 decontamination.
To withstand the pressures associated with the full system decontamination, the seals for reactor-core neutron flux detector thimbles were upgraded.