Do any of you know if the backup water pumps have been upgraded at the Byron NGS? Also, is the plant currently using the main cooling pumps, or the backup pumps? Last year after the Fukushima triple meltdown, the NRC told the Exelon that the backup cooling pumps at Byron were too small to cool the reactor in an emergency, and after waffling back and forth on the issue, the operator, Exelon, decided the pumps were indeed too small. So, are the undersized pumps the reason for their decision to release radioactive steam into the atmosphere? Or is this the normal operating procedure in response to loss of offsite power? Thanks for any expert guidance.