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Title: Shutdown system for a nuclear reactor

An ultimate shutdown system is provided for termination of neutronic activity in a nuclear reactor. The shutdown system includes bead chains comprising spherical containers suspended on a flexible cable. The containers are comprised of mating hemispherical shells which provide a ruggedized enclosure for reactor poison material. The bead chains, normally suspended above the reactor core on storage spools, are released for downward travel upon command from an external reactor monitor. The chains are capable of horizontal movement, so as to flow around obstructions in the reactor during their downward motion.
 [1] ;  [2] ;  [1] ;  [3]
  1. (Naperville, IL)
  2. (Western Springs, IL)
  3. (Oak Lawn, IL)
Publication Date:
OSTI Identifier:
Report Number(s):
US 4452754
DOE Contract Number:
Resource Type:
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
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