Alternative journal entry:
Schematics for an improved power grid have been recovered on Tuchanka. Find someone on the Citadel who can make use of them.
Alison the technician can be found to the right of the Purgatory entrance looking at a datapad in her left hand. Listen to her complaints to acquire the mission.
Alternatively, both the item and the mission's journal entry can be acquired during a sortie against Cerberus in Tuchanka.
Walkthrough EditN7: Cerberus Attack mission on Tuchanka. Take them before turning on the power to the cannons. If you didn't retrieve the power grid from the mission you can buy it from Spectre Requisitions in the Citadel Embassies for 1,000 credits.
Return the item to Alison, who is still standing outside Purgatory. Note: This mission must be completed before completing Priority: Tuchanka as it will be the last opportunity to turn in the item. Alison will be gone from her post after Priority: The Citadel II, nowhere to be found.