ML081760330
| ML081760330 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 06/23/2008 |
| From: | Meixell B Duke Energy Carolinas |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 44312 | |
| Download: ML081760330 (4) | |
Text
1' 06/23/2008 U.S. Nuclear Regulatory Commission OperationsCenter Event Report Paffe I Power Reactor Event# 44312 Site: OCONEE Notification Date / Time: 06/23/2008 11:01 (EDT)
Unit: 1 2 3 Region: 2 State : SC Event Date / Time: 06/16/2008 14:13 (EDT)
Reactor Type: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP Last Modification: 06/23/2008 Containment Type: DRY AMB DRY AMB DRY AMB NRC Notified by: BOB MEIXELL Notifications: BINOY DESAI R2 HQ Ops Officer: MARK ABRAMOVITZ PART 21 GROUP Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 UNSPECIFIED PARAGRAPH Unit Scram Code RX Crit [nit Power Initial RX Mode Curr Power Current RX Mode 1 N Yes 100 Power Operation 100 Power Operation 2 N Yes 100 Power Operation 100 Power Operation 3 N Yes 1 100 Power Operation 100 Power Operation REPLACEMENT BREAKER CHARGING MOTORS FAILED MINIMUM VOLTAGE TEST "Event: On June 16, 2008, Duke Energy (Duke) completed a reportability determination which concluded that a defect associated with 10 electric charging motors for breakers is reportable under Part 21. This is a legacy issue from May 22, 2000, which was re-evaluated as a result of an assessment of Oconee's Part 21 processes. The motors were procured as safety-related fromn Asea Brown Boveri (ABB) (Florence, SC location) on February 22, 2000, ABB Part# 709799T1 1. The motors were received on March 9, 2000 and subsequently, breaker personnel identified the part number on the replacement motors did not agree with the existing motors. When installed in a breaker for testing, the replacement motors did not function at the required minimum 90VDC. Duke will provide follow up written notification within 30 days pursuant to Part 21.21(d)(3)(ii).
"Initial Safety Significance: None. The motors were never placed in service. However, the evaluation concluded because of the safely related applications for which the motors were intended, the defect could have resulted in a significant safety hazard had the motor(s) been placed in service."
The licensee verified that this part was not used at other Duke nuclear plants.
The licensee notified the NRC Resident Inspector and the ABB Project Manager for Oconee.
06/23/08 10:59 FAX 2869 UNIT I & 2 CONTROL ROOM -ý NRC ZOOl Attachment B OMP 1-14 NRC Event Notification Worksheet Page 1 of 3 NRC Event Notification Worksheet Notification Time Facility or Organization Unit Caller's Name Call Back #
Oconee Nuclear Station 1, 2, 3 Bob Meixell ENS 256-9931 (864) 885-3279 NRC Operations Officer Contacted: NRC Event Number:
Event Time/Zone 0 Event Date0 Power/ModeBefore I Power/Mode After 1413 EDT 061/20 N/ N/A I I Event Classifications I 8-Hour Non-Emergency 10 CFR 50.72 (b) (3)
LI General Emergency EI (ii) (A) Degraded Condition El Site Area Emergency El (ii) (B) Unanalyzed Condition El Alert El (xiii) Loss of emergency assessment capability/offsite communications Unusual Event. El (iv) (A) System Actuation El 50.72 Non-emergency (see other columns) F- RPS El 72.75 Spent Fuel (ISFSI) [- Containment isolation El 73.7 r Physical Security El ECCS El Transportation El EFW El 20.2202 Matorial/Exposure F] Containment spray/coolers El 26.73 Fitness for Duty El Emergency AC (Keowee Hydro)
Other: Part 21.211(d)(3)(i) E] (v) (A) Safe Shutdown Capability El (v) (B) Residual Heat Removal Capability I-Hour Non-emergency 10 CFR 50.72 (b)(1)i [] (v) (C) Control of radiological material El Deviation from TS per 50.54(x) El (v) (D) Accident Mitigation El (xii) Transport contaminated person to offsite medical facility 4-Hour Non-Emergency 10 CFR 50.72 (b)(2)
El (i)TS Required Shutdown
[I (iv) (A) ECCS Discharge into RCS E] (iv) (B) RPS Actuation (while critical)
El (xi) News release/notification to other government agencies
06/23/08 11:00 FAX 2869 UNIT I & 2 CONTROL ROOM 4 NRC M002 Attachment B OMP 1-14 NRC Event Notification Worksheet Page 2 of 3 Event Description (Include svstetis affectcd, actuations and their initiating signals, causes, effec of event on plant, actions taken or planned, etc.)
Event: On June 16, 2008, Duke Energy (Duke) completed a reportabilil y determination which concluded that a defect associated with 10 electric charging motors for breakers is repon table under Part 21. This is a legacy issue from May 22, 2000, which was re-evaluated as a result of an assessmerntof Oconee's Part 21 processes..
The motors were procured as safety-related from Asea Brown Boveri ()ýBB) (Florence, SC location) on February 22, 2000, ABB Part# 709799T1 1. The motors were received on March 9, 2000 and subsequently, breaker personnel identified the part number on the replacement motors did not agree witli the existing motors. When installed in a breaker for testing,, the replacement motors did not function at the reqtýired minimum 90VDC. Duke will provide follow up written notification within 30 days pursuant to Part 21.21(d)( 3)(ii).
Initial Safety Significance: None. The motors were never placed in se vice. However, the evaluation concluded because of the safety related applications for which the motors were in ended, the defect could have resulted in a significant safety hazard had the motor(s) been placed in service.
Corrective Action(s): The 10 motors were returned to ABB Florence n 2000 for evaluation.
IAnything unusual or not understood? I Yes (Explain bove) No Did all systems function as required? [ Yes I No (Explain above)
Mode of operations until corrected: N/A JEstimated rest irt date: N/A Does event result in a radiological release, RCS leak, or steam generat r tube E Yes (complete page 3)1 No0 leak?
Does the event result in any of the units experiencing a [ Yes (c plete Oconee Plant Status sheet) No
[transient? Ys( peeOoe ln ttsset Notifications NRC Resident: 4 fNwil Ibe Plant Mabager:f. d*& 5N/will be Notified By: A' 'Time:oiid re State(s): Yj ill be rPeratos Superintendent: Y/Ný l ...
Notified By: Time: Noiie y: T ime:
Local: Y¥ will be Other Goernment Agencies: Y wivill be Notified By: Time: *Notified y: Time:
Media/Press Release: .Y will be YA)ill iOther:
be Notified By: Time jNotified y Time I Operations Shift Manager/Emergency Coordinator Appro at: Date/Timp:
NRC Notification Cornplete by Caller/NRC Coinmunicat r': IDate/Time:
06/23/08 11:01 FAX 2869 UNIT 1 & 2 CONTROL ROOM 4 NRC 2 003 Attachment B OMP 1-14 NRC Event Notification Workshect Page'3 of 3 Additional Information for Radiological Releases Radiological Release (check as applicable with soecific details in event description including release path)
El Liquid Release " Gaseous Release .] Unplanned Release E. Planned Release Fl Monitored E] Unmonitored - Off-Site Release Li TS Exceeded El Personnel Exposed El Rad Mon Alarms Off-Site Protected Actions El Terminated or Contaminated Recommended E] Areas Evacuated El Ongoing Release Rate % TS Limit HOO Guide Total Activity % TS Limit Hoe Guide (Ci/sec) (Ci)
Noble gas: 0.1 Ci/sec 1000 Ci Iodine: 10 pLCi/sec 0.01 Ci Particulate: I pCi/sec 1 mCi Liquid (excluding tritium and 10 pLCi/min 0.1 Ci dissolved noble gases):
Liquid (tritium): 0.2 Ci/min 5 Ci Total Activity:_
Plant Stack Condenser/Air Main Steam SG Blowdown Other
__Ej ector Line Rad Monitor Readings:
Alarm Setpoints:
% TS Limit (if applicable):
Additional Information for Reactor Coolant Leaks and Steam Generator Tube Leaks Location of the leak (e.g. SG, valve, pipe, etc.)
Leak Rate: IUnits (gpm/gpd): TS Limit: ISudden or Long Term Development:
Leak Start Date: Time: 'Coolant Activity & Units:
IPrimary -
ISecondary -
List of Safety Related Equipment Not Operational: