INTERVIEW-Slow is scary if France quits nuclear -state institute

* France's energy policy after 2025 lacks clarity -IRSN EDF needs to replace half its nuclear staff by 2017-18 * Germany's decision to stop nuclear by 2022 was wise-IRSN By Marion Douet TOURNEMIRE, France, April 23 (Reuters) - A long slow retreat from nuclear power in France or indecision over policy could be very risky as skilled staff retire and young people reject careers with an uncertain future, the state-funded atomic safety research institute said. If France does decide to pull out of atomic energy it should follow Germany's example and do it quickly, or face...