ENS Event | |
|---|---|
17:00 Jul 24, 2004 | |
| Title | Advanced Horizontal Storage Module Bolt Failure |
| Event Description | On July 24, 2004, at about 1000 PDT, SCE [Southern California Edison] personnel were tightening two seismic restraint bolts on Advanced Horizontal Storage Module (AHSM) Number 10 at the Unit 1 ISFSI [Independent Fuel Storage Installation] when one of the bolts failed. SCE had placed the storage canister into AHSM No. 10 on July 18, 2004 and was tightening the restraint as specified in the final safety analysis report, after the module had reached thermal equilibrium.
SCE plans to replace the failed bolt with another bolt manufactured under the same Certificate of Compliance and will tighten the seismic restraints within the period allowed by the FSAR (one week from initial placement of the storage canister). SCE's evaluation of the failed bolt is ongoing. SCE has notified the NRC resident inspectors about this occurrence and will provide them with a copy of this report. |
| Where | |
|---|---|
San Onofre  California (NRC Region 4) | |
| Reporting | |
| 10 CFR 72.75(c )(1), ISFSI Defect | |
| Time - Person (Reporting Time:+1.33 h0.0554 days <br />0.00792 weeks <br />0.00182 months <br />) | |
| Opened: | Clay Williams 18:20 Jul 24, 2004 |
| NRC Officer: | Arlon Costa |
| Last Updated: | Jul 24, 2004 |
| 40897 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Decommissioned (0 %) |
| After | Decommissioned (0 %) |
WEEKMONTHYEARENS 408972004-07-24T17:00:00024 July 2004 17:00:00
[Table view]10 CFR 72.75(c)(1), ISFSI Defect Advanced Horizontal Storage Module Bolt Failure 2004-07-24T17:00:00 | |