ENS 46429
ENS Event | |
|---|---|
05:00 Nov 18, 2010 | |
| Title | Potential for Reverse Polarity on Hpci Turbine Eg-R Hydraulic Actuators |
| Event Description | GE Hitachi Nuclear Energy (GEH) has completed an evaluation of the 'Reverse Polarity on HPCI EG-R Hydraulic Actuators,' and has concluded that this is a Reportable Condition in accordance with the requirements of 10 CFR 21.21 (d).
Discussion: GEH provided a refurbished HPCI turbine EG-R Hydraulic Actuator, (GEH Part number DD213A8527P003), as a safety related component, to a domestic BWR/4. When the customer installed the EG-R Hydraulic Actuator at the plant, calibration and post maintenance testing found that the turbine governor valves went to the full open position when the proper response was a fully closed position. Troubleshooting of the newly installed component revealed that the polarity of the component was reversed. An improperly configured EG-R Hydraulic Actuator cannot be utilized in the system because the reversed polarity causes the turbine governor control valves to operate in a manner opposite to the expected response, and calibration of the component by plant personnel cannot be completed. GEH contracted Engine Systems Incorporated (ESI) to perform the repair/refurbishment of this EG-R Hydraulic Actuator. This particular EG-R Hydraulic Actuator is identified as GEH part number DD213A8527P003. The specific EG-R Hydraulic Actuator that was identified with this defective condition was identified as serial number 2288717. Conclusion: This condition would change the operational characteristics of the HPCI system and would create a Substantial Safety Hazard or a violation of a Technical Specification Safety Limit. As such this condition has been determined to be a Reportable Condition within the context of 10 CFR Part 21.21 (d). ABWR and ESBWR Design Certification Documentation Applicability: The issues described above have been reviewed for applicability to documentation associated with 10CFR 52 and it has been determined that there is no affect on the technical information contained in either the ABWR certified design or the ESBWR design in certification. Recommended Action: GEH recommends that [the Hatch, Hope Creek and Peach Bottom] sites that have received EG-R Hydraulic Actuator(s) (GEH Part number DD213A8527P003), check warehouse inventory. If the EG-R Hydraulic Actuator remains 'in stock,' the potential exists that incorrect internal wiring could exist resulting in the EG-R Hydraulic Actuator not responding as expected. GEH recommends that if an EG-R Hydraulic Actuator (GEH Part number DD213A8527P003) is in warehouse stock, that the component be returned to GEH for verification of the internal wiring configuration. |
| Where | |
|---|---|
| Ge Hitachi Nuclear Energy Wilmington, North Carolina (NRC Region 1) | |
| Organization: | Ge Hitachi Nuclear Energy |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+27.55 h1.148 days <br />0.164 weeks <br />0.0377 months <br />) | |
| Opened: | Dale Porter 08:33 Nov 19, 2010 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Nov 19, 2010 |
| 46429 - NRC Website | |
Ge Hitachi Nuclear Energy with 10 CFR 21.21 | |
WEEKMONTHYEARENS 464292010-11-18T05:00:00018 November 2010 05:00:00
[Table view]10 CFR 21.21 Potential for Reverse Polarity on Hpci Turbine Eg-R Hydraulic Actuators ENS 463482010-10-20T04:00:00020 October 2010 04:00:00 10 CFR 21.21 Part 21 - Crack Indications in Marathon Control Rod Blades ENS 462302010-09-03T04:00:0003 September 2010 04:00:00 10 CFR 21.21 Part 21 - Failure to Include Seismic Input in Reactor Control Blade Customer Guidance ENS 459272010-04-15T04:00:00015 April 2010 04:00:00 10 CFR 21.21 Bent Fuel Spacer Flow Wing ENS 460602009-07-01T04:00:0001 July 2009 04:00:00 10 CFR 21.21 Part 21 Report Concerning Failure of Turbine Overspeed Reset Control Valve Diaphragm 2010-09-03T04:00:00 | |