MARVEL (IMAGE) DOE/Idaho National Laboratory Caption MARVEL is a 100 kW thermal microreactor under construction that is targeted to come online at INL in 2024. Credit Idaho National Laboratory Usage Restrictions NA License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.