Jacobs was selected to lead two decommissioning projects at the Dounreay nuclear site in Scotland, U.K., which Dounreay Site Restoration Ltd. (DSRL) estimates to have a combined value of $15.9 million (£11.2 million). Jacobs will upgrade the ventilation systems for the Prototype Fast Reactor (PFR) under a $9.94 million (£7 million) contract from DSRL, the company responsible for cleaning up the site, on behalf of the Nuclear Decommissioning Authority. DSRL has also chosen Jacobs to develop the decommissioning strategy for the Fast Reactor Fuel Reprocessing Plant (FRFRP) under a contract worth $5.96 million (£4.2 million). The scope of the PFR project includes removal of the existing vent plant and design, manufacturing, testing, installation and commissioning of a new discharge stack, new supply and extract fans, new HEPA filters, replacement of containment dampers, discharge contamination monitoring equipment and a new tritium monitoring system. Designed in the early 1960s, the PFR was a MOX-fueled, liquid sodium-cooled fast reactor, which began supplying the National Grid in January 1975 and was taken offline in 1994. The FRFRP, built in the 1950s to reprocess spent fuel from the U.K.'s experimental fast reactors, ceased operations in the mid-1990s.