ENS Event | |
|---|---|
05:00 Oct 9, 2018 | |
| Title | Part-21 - Rhr Shaft Seal O-Ring Sheared Due to Manufacturer Defect |
| Event Description | The following is a synopsis from the Part 21 report received via e-mail:
During an outage at Prairie Island Nuclear Generating Plant, the licensee replaced the mechanical shaft seal on the 11 Residual Heat Removal (RHR) pump. During subsequent post maintenance testing, it was found that there was significant seal leakage on the pump. An evaluation was completed on December 4, 2018, which determined that it was a substantial safety hazard. The licensee has shipped back six seals to Framatome to be tested. It was determined that the cause of the failure was improper O-ring installation by the manufacturer. Discussions with Framatome indicate that only Prairie Island Nuclear Generating Plant is effected by this defect, but investigations are still ongoing. Affected Plant: Region 3: Prairie Island Nuclear Generating Plant |
| Where | |
|---|---|
| Framatome Lynchburg, Virginia (NRC Region 1) | |
| Organization: | Framatome Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+1402 h58.417 days <br />8.345 weeks <br />1.92 months <br />) | |
| Opened: | Gayle Elliott 16:00 Dec 6, 2018 |
| NRC Officer: | Jeffrey Whited |
| Last Updated: | Dec 6, 2018 |
| 53780 - NRC Website
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Framatome with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 577292025-05-21T13:18:00021 May 2025 13:18:00
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