Operating in a RADCON Environment
On 11 March 2011, Japan experienced the fifth-largest earthquake in recorded history. The resulting tsunami caused immeasurable damage including crippling cooling systems at the Fukushima Daiichi reactor complex near Sendai, Japan. In efforts to prevent a catastrophic meltdown, reactors were vented to release increasing internal pressure. Several fission products were sent skyward in a radioactive plume carried easterly into the western Pacific. In addition to the airborne threat, water drawn from the ocean to cool the reactors drained back into the ocean carrying a contaminated ocean-plume eastward.