CHF　look-up　tables　are　used　widely　for　the　prediction　of　the　critical　heat　flux　(CHF).　The　CHF　look-up　table　is　basically　a　normalized　data　bank　for　a　vertical　8　mm　water-cooled　tube.　The　2006　CHF　look-up　table　is　based　on　a　database　containing　more　than　30,000　data　points　and　provides　CHF　values　at　24　pressures,　20　mass　fluxes,　and　23　qualities,　covering　the　full　range　of　conditions　of　practical　interest.　In　addition,　the　2006　CHF　look-up　table　addresses　several　concerns　with　respect　to　previous　CHF　look-up　tables　raised　in　the　literature.　The　major　improvements　of　the　2006　CHF　look-up　table　are:　An　enhanced　quality　of　the　database　(improved　screening　procedures,　removal　of　clearly　identified　outliers　and　duplicate　data).　An　increased　number　of　data　in　the　database　(an　addition　of　33　recent　data　sets).　A　significantly　improved　prediction　of　CHF　in　the　subcooled　region　and　the　limiting　quality　region.　An　increased　number　of　pressure　and　mass　flux　intervals　(thus　increasing　the　CHF　entries　by　20%　compared　to　the　1995　CHF　look-up　table).　An　improved　smoothness　of　the　look-up　table　(the　smoothness　was　quantified　by　a　smoothness　index).　A　discussion　of　the　impact　of　these　changes　on　the　prediction　accuracy　and　table　smoothness　is　presented.　The　2006　CHF　look-up　table　is　characterized　by　a　significant　improvement　in　accuracy　and　smoothness.　(c)　2007　Elsevier　B.V.　All　rights　reserved.