05000361/FIN-2009007-02
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Finding | |
|---|---|
| Title | Incorrect Mixing and Batching Associated with Concrete |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instruction, Procedures, and Drawings, for the failure of contractor personnel to follow procedures to ensure proper mixing and batching of safety-related concrete. Specifically, on December 19, 2009, contractor personnel failed to ensure each batch contained the specified proportion of hydration controlling admixture. This finding was entered into the licensees corrective action program as Nuclear Notification NN 200715236. The finding is greater than minor because the failure to follow procedures for mixing containment concrete, if left uncorrected, would have the potential to lead to a more significant safety concern. The finding is associated with the design control attribute of the Barrier Integrity Cornerstone and affects the cornerstone objective to provide reasonable assurance that physical design barriers (containment) protect the public from radionuclide release caused by accidents or events. Using the Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheets, the finding is determined to have very low safety significance because the finding did not represent an actual open pathway in the physical integrity of reactor containment and because the batch of the concrete in question met the desired design strength as verified by testing. The finding has a crosscutting aspect in the area of human performance associated with work practices since the licensee failed to ensure supervisory and management oversight of work activities, including contractors, such that nuclear safety is supported H.4(c) (Section 4OA5.2) |
| Site: | San Onofre  |
|---|---|
| Report | IR 05000361/2009007 Section 4OA5 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | I Anchondo J Johnson T Buchanan R Hickok J Braisted B Schnetz C Denissen C Proctor F Peduzzi L Ricketson R Lantz T Nazario P Elkmann D Allen J Adams J Reynoso W Sifre G Warnick C Osterholtz M Young A Fairbanks S Makor M Bloodgood |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
| ' | |
Finding - San Onofre - IR 05000361/2009007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (San Onofre) @ 2009Q4
Self-Identified List (San Onofre)
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