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Steam Generator tube leakage at Atucha N.P.P

On March 16, 2007, Atucha NPP, was shutdown due to a steam generator tube failure (SG # 2). The plant remained in cold shutdown, for 9 days, starting up on March 25, 2007.The Total Activity released was less than 20 % of the monthly allowed derived limit for discharge. The mentioned event was not considered safety significant, however, it was assumed reportable because of “degradation of in-depth defense”.

Location: ATUCHA-1
Event date: Fri, 16-03-2007
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Legenda & explanation