I never shot Kodak Ektascan B/RA xray film at night. There were also no information online regarding the reciprocity of this film. This film is normally used for health x-ray applications and there is no need to worry about long exposure. I decided to do a test shot. Shanghai and TriX has terrible reciprocity characteristics. For 1 minute exposure, I generally compensate it by 8x and it worked well. I know Ektascan is probably equivalent if not worse, so I decided to try a 12x compensation for 1 minute metered exposure.
Here is the result. Burke & James Grover 8×10, Fujinon 250mm f6.3 lens, developed in Kodak D76 1+1 10 mins and scanned with Epson Perfection V700.
It looks like a working combination. I think it might be slightly over-exposed, perhaps I need to try one with 10x compensation.