Speaker
Description
The High Flux Isotope Reactor at Oak Ridge National Laboratory is plan-
ning the replacement of the permanent beryllium reflector. During this outage,
all of the cold guide hall instruments will be removed and reinstalled with new
supermirror guides, vacuum casings, and modifications/replacement of some ex-
isting shielding. The new Cold Guide Hall guide network will have six primary
neutron beamlines rather than the current four, which presents challenges due
to limited spacing of the neutron beamlines. Additionally, streaming of neutrons
and gammas through the vacuum network into the cold guide hall must be mit-
igated for personnel dose reasons. The current status of the planned vacuum
network through the HB4 tunnel and shielding updates will be discussed.
Key Words
cold neutrons
shielding