The NSW Arts Minister, Don Harwin, has demanded an urgent report from the director of the Powerhouse Museum, Dolla Merrillees, into allegations that museum executives participated in a night of drunken revelry after a museum fundraiser.

People attend the MAAS Fashion Ball at the Powerhouse Museum in February. Credit:Dominic Lorrimer

Shooters, Fishers and Farmers Party MP Robert Borsak, who heads the upper house inquiry into the relocation of the Powerhouse Museum, raised in Parliament on Tuesday evening reports that senior security personnel attended the museum's executive offices after the Museum of Applied Arts and Sciences' inaugural Fashion Ball last month after a noise complaint and found several prominent museum staff ''intoxicated, drinking Moet & Chandon in the presence of a white powder''.

Mr Borsak has called for an immediate investigation into this "code of conduct breach'' to establish if members of the museum's senior executive team were present and asked that the matter be referred to police. Under its ethics code, all museum employees are barred from using alcohol or drugs or smoking on museum premises and while performing their duties.