The deuterium inventory at Joint European Torus (JET) in co-deposits and bulk material in inner, outer and upper wall components of the vacuum vessel exposed in 2007-2009 has been determined using Nuclear Reaction Analysis (NRA) and Secondary Ion Mass Spectrometry (SIMS) and optical microscopy. Approximately 1.8g of the deuterium is retained in these areas which correspond ~0.07% of the retained deuterium.