Speaker
Description
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL) utilizes the Cryogenic Moderator System (CMS) to provide supercritical hydrogen cooling at 20 K to three neutron moderators. As part of the Proton Power Upgrade (PPU) project, two significant enhancements were made to the CMS: the integration of ortho-hydrogen into para-hydrogen catalyst beds and an expansion of hydrogen supply capacity through a new Hydrogen Refill System (HRS). This paper will detail the design, installation, and commissioning of these subsystems. PPU increased SNS beam power on the First Target Station (FTS) from 1.4 MW to 1.7 MW. Implementation of new controls for the CMS helium cryogenic cold box for this higher beam power will be discussed. Future work to ensure successful operation at a 2.0 MW beam power will also be outlined.
