BWXT Y-12 personnel recognize the benefits of using bio-based alternative fuels to reduce the use of non-renewable natural resources, toxic emissions, and dependence on petroleum products (i.e., foreign energy sources) and are committed to expanding the use of bio-based fuels in the Y-12 vehicle fleet. Underpinning this commitment is the fact that Anderson County is in non-attainment for some of the pollutants present in vehicle emissions, and U.S. Department of Energy (DOE) and Presidential Executive Orders call for federal fleets to be converted to bio-based fuels to improve the energy security of the United States.
The Y-12 fleet is comprised of 73 diesel and 515 gasoline-powered vehicles, of which 76 are flexible fuel vehicles (FFV) that can burn E85 (i.e., 85 percent ethanol and gasoline mixture). The FFV’s currently comprise approximately 13 percent of the fleet. Y‑12 has in place an ongoing program to purchase more FFV’s to replace gasoline-powered vehicles that are removed from service, and has one fueling station on-site providing E85. In Fiscal Year (FY) 2006, BWXT Y-12 established an objective and target as part of their Environmental Management System (EMS) to increase E85 use in the FFV fleet to 80% in FY 2006. BWXT Y‑12 developed and implemented an EMS action plan to achieve this goal and has completed various initiatives to increase the use of bio-based fuels by improving E85 usage rates. Before this project was implemented, FFV drivers at Y-12 could choose between regular gasoline and E85 when they fueled their vehicle at Y-12 fueling stations. When E85 became available to the Y-12 Complex in October 2004, E85 usage rates were lower than expected due to low driver awareness of E85 availability, resistance to change, and possible misconceptions about E85 costs and safety. Beginning in October 2005, Y-12 changed fueling policies and procedures to make it mandatory that all FFV drivers use E85 while on-site. “E-85 Only” decals were placed on FFV gas caps, and large “E-85 85% Ethanol” magnets were added to all FFV’s. Awareness and education on E85 benefits and availability was delivered across the Y-12 Complex.
Y-12’s initiatives increased the E85 used by the FFV fleet to 100% by March 2006, and reduced consumption of gasoline by more than 15,500 gallons in FY 2006. E85 usage in June 2006 was greater than that reported for the entire FY 2005. This increased E85 use resulted in elimination of more than 1,100 pounds of toxic air emissions for an overall tail-pipe emission reduction of 39% from emissions if standard gasoline had been used. Use of E85 fuel in FY 2006 resulted in the following emission reductions: nitrogen oxides (NOx) 4.6 lb (10%), volatile organic compounds (VOC) 8.8 lb (15%), carbon monoxide (CO) 1,092 lb (40%), and particulate matter (PM) 1.3 lb (20%).
In addition to Y-12’s E85 initiative, in FY 2006 Y-12 established plans, finalized contracts and took steps to prepare the diesel fueling infrastructure to allow conversion of 100% of diesel vehicles to bio-based diesel (B20) during the next fiscal year. Final procurement activities were completed in FY 2006 and Y-12 received the first shipment of bio-based diesel in November 2006. Bio-diesel burns cleaner and is biodegradable, which means it dissipates quickly after a spill. Additional benefits of bio-diesel usage include the following: bio-diesel has a high flashpoint and low volatility so it does not ignite as easily as petroleum‑based diesel, which increases the margin of safety in fuel handling. In fact, it degrades four times faster than petroleum-based diesel and is not particularly soluble in water. Bio-diesel also provides better lubricity than diesel.
It is anticipated that use of bio-based diesel (B20) in the Y-12 diesel fleet will further reduce use of petroleum products at Y-12 by at least 6,000 gallons per year, and result in additional reductions in toxic air emissions.
These alternative fuel initiatives showed innovation and dedication by Y-12 personnel to find environmentally-friendly products that met specifications, which resulted in a win‑win situation for the Y-12 Complex, the U.S. Department of Energy, the public, and the environment.