An implanted nuclear powered anything is a bad idea. You should research into nuclear power so you understand the physics and the fact it will never provide a viable source of implanted power.
Secondly the issue with a fully implantable cochear implant is that it is restricted to the fact that current microphone, battery and sound processing technology is not mature enough to be implantable. Remember that infants are being implanted with the expectation that it will operate for their whole life. Battery technology is not there yet (and no...nuclear power that is small enough to implant is not the answer).
"Cochlear implant companies are NEVER going to release a commercial totally implantable cochlear implant"....... "Man will never walk on the moon", "No one will ever need more than 640K of RAM in their PC".
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.