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Title: CAUSAL ANALYSIS OF THE UNCONTROLLED MODERATOR IN THE HFEF MAIN CELL

On 11/07/2012 while investigating the cause of defects in neutron radiography film at HFEF, oil was discovered near the elevator shaft located at the 4M location within the Main Cell. Subsequent investigation identified oil (untracked moderator) in several locations ofthe HFEF Main Cell. Initial analysis determined that oil leaking from a 1M shielding window had leaked past a compensatory containment system resulting in a thin layer of oil found in several locations on the main cell floor. The result of this condition is uncontrolled moderator in moderator controlled zones, which is a violation of Criticality Hazard Control Statements (CHCS) for HFEF.
Authors:
;
Publication Date:
OSTI Identifier:
1124664
Report Number(s):
INL/EXT-12-27982
DOE Contract Number:
DE-AC07-05ID14517
Resource Type:
Technical Report
Research Org:
Idaho National Laboratory (INL)
Sponsoring Org:
DOE - NE
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS Controls; moderator; oil; shielding; window