05000285/FIN-2012009-01
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Finding | |
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| Title | Evaluation of Future Discharge Tunnel Inspection Plans |
| Description | Commitment 32 specified that OPPD will perform a one-time inspection of the circulating water discharge tunnel per the structures monitoring program (B.2.10). The circulating water discharge tunnel will be included within the scope of license renewal as part of the intake structure. The safety evaluation report and updated final safety analysis report identified that the inspections would occur prior to entering the period of extended operation. The inspectors reviewed this area by reviewing the underwater video of the inspection, conducting interviews with personnel, and reviewing documents. The licensee indicated that they planned to drain the discharge canal and perform a 100 percent one-time inspection of the structure. Because of time needed for planning and logistics, the licensee decided to conduct the inspection after entering the period of extended operation. The licensee had performed a 10 CFR 50.59 evaluation that justified allowing the inspection to occur until after they entered the period of extended operation. The inspectors questioned the licensee about performing the inspection during the ongoing extended shutdown. Following questioning by the inspector, the recovery team, who was methodically reviewing previously completed 10 CFR 50.59 evaluations, selected this 10 CFR 50.59 evaluation for independent review. The licensee determined that the 10 CFR 50.59 failed to recognize that License Condition 3.E required that the inspection be completed prior to entering the period of extended operation. Any change that did not meet this time frame would require NRC approval for the change. Consequently, the licensee performed underwater inspections prior to entering the period of extended operation. Divers evaluated the condition of approximately 10 percent of the interior surface area of the discharge tunnel. The divers reviewed low flow areas, areas that had direct impingement of flow, and one area that had the expected flow midway down one wall. The inspectors reviewed the areas selected and identified no concerns. The inspectors determined that underwater inspections of similar structures at other facilities had been performed as a representative sample. At the end of this inspection, the licensee was evaluating whether to conduct periodic inspections of the discharge tunnel as they do other structural inspections or to perform a 100 percent inspection after entering the period of extended operation. The licensee documented the inadequate 10 CFR 50.59 evaluation in Condition Report 2012-03113. The inspectors reviewed the examples in the Enforcement Manual and determined that no violation of 10 CFR 50.59 or other regulatory requirements resulted because the licensee completed the task prior to entering the period of extended operation, as committed. Follow-up and evaluation of the resolution for conducting inspections of the discharge tunnel is an unresolved item. |
| Site: | Fort Calhoun  |
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| Report | IR 05000285/2012009 Section 4OA5 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | G Meyer G Miller G Pick J Melfi J Rivera Ortiz S Makorc Speerg Miller G Pick S Makor |
| INPO aspect | |
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Finding - Fort Calhoun - IR 05000285/2012009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Fort Calhoun) @ 2012Q2
Self-Identified List (Fort Calhoun)
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