shell has temporarily taken a unit offline at its 404000 bd pernis refinery in rotterdam the netherlands to repair a leak the company said in a post to social media tuesday due to a leak on one of our units it has been decided to temporarily take it out of operation in a controlled manner for repair shell tweeted stopping and restarting the unit may be accompanied by flares the company did not comment on which unit was affected or how long it would be offline this content was created by oil price information service which is operated by dow jones  co opis is run independently from dow jones newswires and the wall street journal