French to English Tech/Engineering Petroleum Eng/Sci large-scale major plant maintenance shutdowns

(used as a countable, so also occurs as 'mises...')

I am having terrible trouble finding a satisfactory and relatively neat solution for this term, which occurs scores of times in a document of nearly 200 pages! It is all about planning and organization of major shutdowns for maintenance etc., and this particular step crops up in loads of different circumstances.

I understand what it means: "the making available" — generally, of an item of plant that is released from production in order to be made available for maintenance work (in other words, it has been rendered safe, isolated, etc.)

But I have no earthly idea how to render that succinctly in EN! Normally, I would attempt to convert this noun group into an active verb, but in the vast majority of cases here, this is simply not possible; particularly, if this noun is used as one in a whole list of other nouns, where it is simply not viable to turn them all into verb expressions.

Here is just one tiny example of where it is used, there are far too many more for me to post them all:

"Ne pas oublier les [certain items of equipment] dans les mises à disposition pour travaux"

Needless to say, I have thoroughly searched the KudoZ archives, but none of the solutions so far proposed seem to me usable in the specific contexts I have. It is very clear that it is the actual act of making available that is being referred to specifically, so merely 'availability' etc. simply won't work.

I have just been toying with the idea of 'hand-over' — what do others think of that, and can anyone confirm whether this would be the right sort of jargon to use in the petrochemical industry?