Not able to get lookup values for HRC_ALERT_MESSAGE_STATUS

Summary:

Hello everyone,

I am building a report from the table HRC_ALERT_RUN_RECIPIENTS to get the recipient email id who got alert emails. There is field called 'Status' which holds the codes if the email sent successfully. I see values as ORA_S and ORA_K I am not sure what is the meaning. (I think ORA_S is success but not sure what is ORA_K)

Field = Status. Comments = "Determines if the message was sent. Valid values are defined in lookup of HRC_ALERT_MESSAGE_STATUS"

The issue is I am not able to find this Lookup code in Common Lookups. Can you please let me know how/where I can check this lookup code and values.