ENS 52394
ENS Event | |
|---|---|
05:00 Sep 28, 2016 | |
| Title | Part-21 Notification - Design Basis Errors Using Flo-2D Software |
| Event Description | The following report was received via e-mail:
This letter serves as an Interim Report in accordance with 10 CFR 21.21 pertaining to a potential defect associated with a design basis calculation delivered to First Energy Nuclear Operating Company's Perry Nuclear Power Plant. Subsequent to delivering this calculation, FLO-2D software errors were identified which resulted in erroneous outputs that affect the local intense precipitation calculation. These errors were discovered on September 28, 2016, at which time, ENERCON generated a Corrective Action Report (CAR) to address the issue. ENERCON has initiated a reevaluation of the calculation using the latest version of the software that will correct the errors in the calculation. An evaluation of the reportability of this issue in accordance with 10 CFR Part 21 is not able to be completed within the 60-day evaluation period due the need to verify and validate the latest version of the software and then complete all the analysis required for updating the calculation. This evaluation is being tracked by CAR 2016-0335 and will be completed no later than February 10, 2017. If you have any questions or need further clarifying information, please contact Nick Eggemeyer, Corporate Quality Assurance Manager, at (770) 590-2031.
The following update was received via e-mail: This letter serves as an amendment to the 10 CFR 21.21 Interim Report filed on November 23, 2016, pertaining to a potential defect associated with a design basis calculation delivered to First Energy Nuclear Operating Company's Perry Nuclear Power Plant. Subsequent to delivery of the calculation, a standard, periodic review of the FLO-2D Pro software supplier website indicated that a new build of this software (version 16.06.16) had been issued. It replaced the software build (version 14.08.09) that was used for the above referenced design calculation. As a result of the model revision associated with FLO-2D, it was determined that the outputs were impacted which could affect this design basis calculation. These output changes were discovered on September 28, 2016, at which time ENERCON generated a Corrective Action Report (CAR) to address the issue. ENERCON has initiated a reevaluation of the calculation using this new build of the FLO-2D Pro software. An evaluation of the reportability of this issue in accordance with 10 CFR Part 21 is not able to be completed within the 60-day evaluation period due the need to verify and validate the latest version of the software and then complete all the analysis required for updating the calculation. This evaluation is being tracked by CAR 2016-0335 and will be completed no later than February 10, 2017. If you have any questions or need further clarifying information, please contact Nick Eggemeyer, Corporate Quality Assurance Manager, at (770) 590-2031. Notified the R1DO (Schroeder), R3DO (Cameron), and Part 21 Group (via e-mail).
The following information was received via E-mail: This letter serves as an evaluation summary in accordance with 10 CFR 21.21 pertaining to a potential defect associated with a design basis calculation delivered to FirstEnergy Nuclear Operating Company's Perry Nuclear Power Plant. The 10 CFR 21.21 Interim Report was filed on November 23, 2016. An Amendment to the 10 CFR 21.21 Interim Report was filed on December 12, 2016. Subsequent to the filing of the Amendment to the Interim Report, the updated FLO-2D software, build 16.06.16, was verified and validated and a re-analysis performed. A comparison between the original analysis and the updated analysis using the updated software was then performed. This analysis indicates flood water level changes assumed in the Perry Nuclear Plant flooding analyses are small, -0.14 feet to +0.16 feet (-1.6 inches to +1.9 inches). The comparative results between the two analyses were provided to First Energy Company's Perry Nuclear Power Plant on February 3, 2017. Perry Nuclear Plant staff are continuing to review these results in order to complete the determination of whether the change in flood water levels results in additional reporting requirements. If you have any questions or need further clarifying information, please contact Nick Eggemeyer, Corporate Quality Assurance Manager, at (770) 590-2031. Notified the R2DO (Sandal), R3DO (Kunowski), and Part 21 Group (via e-mail). |
| Where | |
|---|---|
| Enercon Kennesaw, Georgia (NRC Region 1) | |
| Organization: | Enercon |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
| Time - Person (Reporting Time:+1349.93 h56.247 days <br />8.035 weeks <br />1.849 months <br />) | |
| Opened: | Nick Eggemeyer 11:56 Nov 23, 2016 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Feb 9, 2017 |
| 52394 - NRC Website | |
Enercon with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
WEEKMONTHYEARENS 523942016-09-28T05:00:00028 September 2016 05:00:00
[Table view]10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part-21 Notification - Design Basis Errors Using Flo-2D Software 2016-09-28T05:00:00 | |