Relationship between Dolby Reference and LUFS/LKFS

As i understand it, Dolby Reference level set to 7 will give a fixed and known volume of 85dBc using a "dolby pink noise." I have also read that this should equal -31 LUFS.

If we play source material with a loudness of -18 LUFS, on a calibrated system set to Dolby Reference level 7, can we then predict that the SPL will be around 85+13=98 dB(LAS)?