I've calculated the impacts of my product system using both TRACI 2.1 and IMPACT 2002+ impact assessment methodologies from the LCIA 2.0.3 package I downloaded from the openLCA Nexus site. I'm using openLCA version 1.8. All of the values calculated on the "Impact analysis" tab of the analysis seem reasonable and within the range of what I expected for my product system, based on other research/LCAs out there.
That is, except for the respective "Fossil fuel depletion" and "Non-renewable resources" impact categories, which both have a zero value. I'm not sure why, considering I have plenty of electricity processes in my product system utilizing coal, natural gas, etc. Two examples are "Electricity, bituminous coal, at power plant - US" and "Electricity, natural gas, at power plant - US". I also use flows such as "Bituminous coal, combusted in industrial boiler - US". So it seems to me that there would be some sort of value for MJ of fossil fuel depletion.
Any ideas as to why these impacts are zero?