During the Spring 2006 outage, Entergy completed a partial modification to install upgraded
sump strainers in response to Generic Safety Issue 191, which was associated with debris-induced clogging of pressurized water reactor
sumps. Prior to restart from the Spring 2006 outage, Entergy identified several instances where
weld data sheets were missing for the
sump modification. Entergy formed a reconstitution engineering team to recover the missing data sheets or disposition the missing data through engineering evaluation. This effort was completed and Entergy determined that the
sump was
operable prior to restart. On January 22, 2007, Entergy learned that additional
weld records for the
sump strainer installation were potentially missing, and initiated an independent review into eight of the 63 completed work packages associated with the strainer modification. The review identified additional missing
weld records which were lost, misplaced, or discarded, but which had not been identified or evaluated during the previous reconstitution effort. Entergy initiated
CR IP2-2007-00699 on February 8, 2007, to document the results of the independent review and initiate corrective actions. Entergy completed an engineering review of the newly identified missing information and concluded that the
sumps remained
operable. Additional actions planned by Entergy include a review of the remaining containment
sump work packages and a visual inspection of safety related
welds with missing
weld data. This issue is unresolved pending the completion of Entergys review and NRCs subsequent evaluation.
