Bernie Riemer

Bernie Riemer

Position: PPU First Target Station Systems Manager

Facility: Spallation Neutron Source

Phone: (865) 574-4160


  • 2017 – present: PPU First Target Station and R&D Manager
  • 2006 – 2017: Development team leader, Source Development & Engineering, SNS Neutron Technologies Division
  • 1999 – 2006: Target Systems Engineer, SNS Experimental Facilities Division
  • 1989 – 1999: Staff engineer at Oak Ridge National Laboratory, USA
  • 1982 – 1989: Grumman Aerospace Corporation, USA
  • 1981 – 1982: Sikorsky Aircraft Corporation, USA

Mr. Riemer obtained his M.S. from the University of Tennessee while on assignment to ORNL to work on fusion energy for the Grumman Aerospace Corporation. After a year in Japan collaborating on fusion engineering, Mr. Riemer joined ORNL as an engineering analysis specialist. Work at ORNL provided diverse challenges that laid the foundation for taking on analysis of the first-of-a-kind SNS mercury target, with its complex dynamic response to the intense proton pulse loading. He formally joined SNS in 1999. His contributions include development of a method to simulate the target pulse response, leading experiments investigating pulse induced cavitation damage of mercury target vessel and initiating post-irradiation examinations of spent targets. Mr. Riemer has a broad understanding of spallation source technologies including radiation effects on materials, moderator and reflector systems, remote handling and essential utilities. He is currently a member of CERN’s HiRADMAT (High-Radiation to Materials) Facility Scientific Board. He has chaired the design review of mercury spallation target used at the JPARC facility in Japan and has been a reviewer of the ISIS TS-1 Upgrade at the Rutherford Appleton Laboratory in the UK. Mr. Riemer chaired the 13th Int’l Workshop on Spallation Materials Technology hosted by the SNS and serves on the organizing committee of the High Power Targetry Workshop.


  • M.S., Engineering Science & Mechanics, University of Tennessee, 1986
  • B.E., Mechanical Engineering, Stevens Institute of Technology, 1981