Hi jfavourite,
Since your question regards the loads on nozzle analysis as per API 610, I would check only the operation loads.
In my opinion, the purpose to have this check done is to assure the pump’s alignment during the operation. If an earthquake occurs, there you will have to stop the plant anyway, check every system maybe start a precomminsionig, align the pump and then start up.
I hope this could help you
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Santiago Naranjo