DB Engine :: When Is Log File Cleared

Recovery model: Simple with Full backups

begin transaction
begin try
        insert into [EthnicRace] select * from [OEPRD].[CIS_Source_Data].[dbo].[EthnicRace];
        insert into [MilestoneOwner] select * from [OEPRD].[CIS_Source_Data].[dbo].[MilestoneOwner];
        insert into [PS_ACAD_CALTRM_TBL] select * from [OEPRD].[CIS_Source_Data].[dbo].[PS_ACAD_CALTRM_TBL];
        insert into [PS_ACAD_DEGR] select * from [OEPRD].[CIS_Source_Data].[dbo].[PS_ACAD_DEGR];
end try

A job on our production server goes out to Oracle and gets raw data from our student system once per night. A job on our development server then uses the above coding to copy that raw data from production to the tables in our development system. My question is, will the log continue to grow until the "end try" is encountered or is it cleared at the end of each INSERT statement?