I read this thread with interest. It took ages before the two truly important questions were asked, but then we started to get some decent analysis.
I would generally, for an average building suggest that the overriding issue is "what do you mean by kitchen?"
However, we are talking in-patient accomodation in health care premises, so against my normal attitude I must agree that 'Fire-Code rules, OK'
I used to cause great argument years ago by pointing out to people who insisted that any room called a kitchen required 'high risk' classification. The old 'blue Guide' put it quite well. it suggested that a real kitchen required a 60 min door, BUT specifically excluded that use / door from being 'upgraded'. I would therefore ask "does that kettle justify the installation of a new 60 min door-set?" result, mumbling.
In this case, however, it is not the nature of the use of the room that is the issue, it is the location and the nature of the risk to the occupants of the adjoining spaces. Those are therefore the factors that should be analysed in my opinion.