Which sentence is correct?

[bluetishers]

Jacques Cousteau loved the sea & was in the French Naval Academy, where he worked on breathing machines for longer dives.

or

Jacques Cousteau loved the sea & was in the French Naval Academy, there he worked on breathing machines for longer dives.

[MrPedantic]

Hello Bluetishers, welcome to Using English!

I'll give you a clue; then see if you can answer the question.

Clue: the word must be a conjunction.

Which can be used as a conjunction: "where" or "there"?

MrP