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SUMMARY:Nuclear Safety - Mike Weightman\, Visiting Professor
DTSTART:20131210T140000Z
DTEND:20131210T160000Z
UID:TALK48938@talks.cam.ac.uk
CONTACT:Jo Boyle
DESCRIPTION:In April 2005 a routine review of the material balance of nucl
 ear materials across the Sellafield Thermal Oxide Reprocessing Plant (THOR
 P) revealed a significant in-balance.  This was traced to a large leakage 
 of highly radioactive dissolver liquor from the inlet to an accountancy ta
 nk into the cell of the THORP head-end plant.  Some 83 cubic metres of liq
 uor had built up in the bottom of the cell and had gone unnoticed for seve
 ral months.  No evidence was found of leakage out of the cell into the env
 ironment nor did any person\, worker or member of the public receive any s
 ignificant radiation dose.  However\, the plant had to be shut down for ov
 er a year and a half\, the operator was prosecuted and the regulator to re
 -consider how to address such issues as an operators safety culture.  \nTh
 is presentation reviews this incident and its causes and presents it as a 
 case study of lessons for designers\, operators and regulators.\n
LOCATION:Cambridge University Engineering Department\, Lecture Room 4
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