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| Quarter | Site | Title | Description | |
|---|---|---|---|---|
| 05000244/FIN-2018011-01 | 2018Q1 | Ginna | Potential Preconditioning of Turbine Driven Auxiliary Feedwater Surveillance Testing | The NRC identified a Green non-cited violation (NCV) of Title 10 of the Code of Federal Regulations (10 CFR) Part 50, Appendix B, Criterion XI, Test Control, because Exelon established unevaluated preconditioning, with a reasonable doubt of whether the preconditioning was acceptable, prior to testing of the turbine driven auxiliary feedwater pump. This results in the loss of as-found conditions which challenge the capability of the test to assure that the turbine driven auxiliary feedwater pump will perform satisfactorily in service. |
| 05000244/FIN-2018011-02 | 2018Q1 | Ginna | Failure to Procedurally Verify Fuel Transfer Cart Results in Fuel Interference Event | A self-revealing Green non-cited violation (NCV)of Technical Specification 5.4.1.a, Procedures, was identified for the failure of Exelon to operate refueling equipment in accordance with technical procedures in April and May of 2017, which resulted in a fuel interference event, damage to the rod cluster control assembly, and the need for a detailed inspection of a fuel assembly |
| 05000244/FIN-2017004-01 | 2017Q4 | Ginna | Inadequate Component Monitoring Relating to Online Risk Management and Assessment | The inspectors identified a finding because Exelon personnel did not follow Procedure WC-AA-101-1006, On-Line Risk Management and Assessment, Revision 2 to sufficiently monitor components such that the latest information was used to evaluate plant risk. Specifically, on December 27, 2017, Exelon failed to sufficiently monitor the diesel driven air compressor, commensurate with its operating history, such that a failure would be assessed and updated in the current plant risk assessment. Exelon entered this issue into the corrective action program (CAP) for resolution as action request (AR) 0487519. Corrective actions included declaring the diesel driven air compressor non-functional, transitioned to Yellow online plant risk, and completed restoration of the C Instrument Air Compressor.This finding is more than minor because it is associated with the configuration control attribute of the Initiating Events cornerstone and adversely affected the associated cornerstone objective to limit the likelihood of events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Additionally, this issue is similar to Example 7.f of IMC 0612, Appendix E, Examples of Minor Issues, issued August 11, 2009, because the overall elevated plant risk placed the plant into a higher licensee-established risk category. The inspectors evaluated this finding using IMC 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process, to determine the significance of the finding. The inspectors used Flowchart 2, Assessment of (risk management actions) RMAs, to analyze the finding and calculated the incremental large early release probability using PARAGON, Exelons risk assessment tool, and found the increase in incremental large early release probability was less than 1E-7. The inspectors determined that if this condition existed for the full duration of the maintenance period, the large early release probability would have been 2.22E-7. Because the increase in incremental large early release probability, was less than 1E-7, this finding was determined to be of very low safety significance (Green). This finding has a cross-cutting aspect in the area of Human Performance, Avoid Complacency, because Exelon did not recognize and plan for the possibility of mistakes, latent issues and inherent risk, even while expecting successful outcomes. Specifically, Exelon did not ensure a component used to manage and assess risk was monitored at a frequency commensurate with its past performance. (H.12) |
| 05000289/FIN-2017003-01 | 2017Q3 | Three Mile Island | Licensee-Identified Violation | The following violation of very low safety significance (Green) was identified by Exelon and is a violation of NRC requirements, which meets the criteria of the NRC Enforcement Policy for being dispositioned as a non-cited violation.Technical specification 4.1.4, Operational Safety Review, requires each remote shutdown system function shown in Table 3.5-4 shall be demonstrated operable by the performance of the following check, test, and calibration. The technical specification surveillance requirement 4.1.4.b states that the licensee shall verify each required control circuit and transfer switch is capable of performing the intended function in accordance with the licensees surveillance frequency control program, in this caseevery refueling interval. Contrary to SR 4.1.4.b, from January, 1987, until September 2017, Exelon did not verify that each required control circuit on the Unit 1 remote shutdown panel was capable of performing the intended function. Specifically, Exelon did not test four of the required six relays for the B EDG either by operation of the components or by performance of a continuity check. Exelons corrective action included entering this issue into the CAP as issue reports 4020064 and 4047426, developing a remote shutdown system testing procedure for the B EDG system, and the completion of a risk evaluation as required by surveillance requirement 4.0.2. The inspectors determined that the finding was more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective to ensure the reliability of systems that respond to initiating events to prevent undesirable consequences. It is of very low safety significance (Green) in accordance with NRC IMC 0609, Appendix F, Fire Protection Significance Determination Process, since the missed surveillance did not impact the ability to reach safe shutdown. |