Details here:
https://www.jpc.de/jpcng/classic/detail/-/art/Louis-Vierne-1870-1937-Klavierwerke-Gesamtaufnahme/hnum/2126765
This is certainly a welcome rerelease; Delvallee's is my favourite of the three currently available sets of Vierne's "complete" pianos works (the others are Sergio Monteiro on Naxos, due to be completed with the release of volume 2 later this year, and Olivier Gardon on Timpani). Since the recording of both Gardon and Delvallee's surveys in the early 90s, additional pieces have come to light, so Monteiro's is the only set to feature all the piano works still in existence. I'd hoped that Cédric Tiberghien might have been persuaded to record his own survey for Hyperion, given he and Alina Ibragimova's brilliant recording of Vierne's Violin Sonata (CDA68204).
cheers,
Daniel