ENS 50176
ENS Event | |
|---|---|
16:32 Jun 6, 2014 | |
| Title | Voluntary Notification for an Item of Regulatory Interest |
| Event Description | Salem Unit 2 has early vintage Model 93A Reactor Coolant Pumps (twenty, one-inch bolt configuration). The Reactor Coolant Pumps (RCPs) have been removed and are being inspected to resolve issues associated with the failure of bolts which secure the turning vane assembly to the thermal barrier. Inspections have identified turning vane assembly detachment and dropping of the reactor coolant pump turning vane diffuser on the 23 RCP. The inspections identified evidence of slight contact between the impeller and the diffuser.
Salem Unit 2 has had no indications to date of adverse operating conditions of any RCPs due to turning vane assembly detachment which would compromise plant safety. This condition has been evaluated against the reporting requirements of 10 CFR 50.72. It has been determined that the condition does not rise to the significance necessitating a report under any specific requirements of 10 CFR 50.72. PSEG is voluntarily reporting this condition IAW with NUREG 1022, Section 4.2.2 so that the NRC and the industry will be informed. The other three RCPs in Unit 2 are currently undergoing evaluation to determine if the same condition exists on them. Based on the findings of those evaluations, the licensee will determine whether reporting under 10 CFR 21 is warranted. Salem Unit 1 has the same model RCPs but they have a different bolt configuration (1.5 inch versus 1 inch) and they have not exhibited the bolt failures exhibited by the Unit 2 pumps. The licensee has notified the State of New Jersey Bureau of Nuclear Engineering and will be notifying the Lower Alloways Creek township and the NRC Resident Inspector. |
| Where | |
|---|---|
Salem  New Jersey (NRC Region 1) | |
| Reporting | |
| Information Only | |
| Time - Person (Reporting Time:+-3.7 h-0.154 days <br />-0.022 weeks <br />-0.00507 months <br />) | |
| Opened: | William Muffley 12:50 Jun 6, 2014 |
| NRC Officer: | Dong Park |
| Last Updated: | Jun 6, 2014 |
| 50176 - NRC Website
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WEEKMONTHYEARENS 501762014-06-06T16:32:0006 June 2014 16:32:00
[Table view]Information Only Voluntary Notification for an Item of Regulatory Interest ENS 458212010-04-06T12:30:0006 April 2010 12:30:00 Information Only Storm Drain System Tested Positive for Tritium 2014-06-06T16:32:00 | |