A passive venting arrangement for use in venting gases produced by radioactive materials. The arrangement includes a source gas region for receiving the gases and a filter ullage region disposed above the source gas region and segregated therefrom. A removable lid includes the filter ullage region and a plurality of bore holes. Each bore hole extends between, and fluidly couples, the source gas region and the filter ullage region. The arrangement also includes a plurality of filters disposed in contact with the filter ullage region. Each filter is structured to provide for an exchange of gases from the filter ullage region through the filter to an ambient environment.