IR 05000374/1996017
| ML20134M891 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 11/20/1996 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20134M869 | List: |
| References | |
| 50-374-96-17, NUDOCS 9611260077 | |
| Download: ML20134M891 (7) | |
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l U.S. NUCLEAR REGULATORY COMMISSION l
REGION 111
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Docket No:
50-374 License No:
NPF-18 Report No:
50-374/96017(DRS)
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Licensee:
Commonwealth Edison Company Facility:
LaSalle County Station, Unit 2 Location:
2601 North 21st Road Marseilles, IL 61341 Dates:
October 22-23 and 25,1996 i
Inspectors:
D. Jones, Reactor inspector j
Approved by:
W. J. Kropp, Chief, Engineering Branch 1
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Division of Reactor Safety l
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i 9611260077 961120 PDR ADOCK 05000374
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BEPORT DETAILS
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ll. Maintenance M1 Conduct of Maintenance M 1.1 Observation of Inservice Insoection (ISI) Activities a.
Insoection Scone (73753,73052. 7375_E)
The inspector observed work, HP practices, review 3d ISI procedures, personnel certifications and reviewed data associated with the following activities:
General Electric Nuclear Energy (GE) personnel performing liquid penetrant examination (PT) and ultrasonic testing (UT) on the high pressure core spray (HPCS) safe end to reactor nozzle (N16) weld number HP-2001-26A.
e GE personnel performing ultrasonic equipment calibration for the examination of the HPCS nozzle N16 weld.
b.
Observations and Findinas Vendor personnel (General Electric (GE)) performed ISI to the ASME, Boiler and Pressure Vessel Code,Section XI,1989 Edition. Licensee activities observed were performed in accordance with applicable ASME Code requirements.
All applicable ISI procedures were approved by the ANIinspector and were reviewed by the NRC inspector. The ISI procedures were found to be acceptable and in accordance with ASME Code,Section V,1989 Erjicion.
The inspector witnessed the PT and UT inspection of the high pressure core spray (HPCS) safe end to reactor nozzle (N16) weld number HP-2001-26A. Prior to the UT examination of HP-2001-26A,the GE technician discovered that the PT examination was performed in error on weld HP-2001-268(safe end extension).
Work was stopped, and an approximately 24-hour ISI standdown was held. During the ISI standdown, meetings were held between the inspection technicians, rad:ation technicians, and management to discuss factors which led to the PT exam of the wrong weld, and corrective actions to preclude the recurrence of the event and tn improve the ISI program.
The inspector attended an ISI standdown meeting held to present the corrective l
actions, and to further solicit input on the proposed actions. The corrective actions included: using as-built drawings to locate welds by measurement, improving the lighting of the inspection area, and improving the labeling of the nozzle doors.
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o The inspector observed the re-inspection of the nozzle following the standdown, including the revised work package, which included weld location measurements, and significantly improved work area lighting.
c.
Conclusions The lack of specifying the weld location in the work package and the poor lighting of the inspection area was indicative of ineffective work planning and resulted in the wrong weld being examined. The inspector concluded that the licensee's corrective actions, along with better familiarization of workers with the weld location during a pre-job briefing, appeared to be sufficient to preclude recurrence.
M3 Maintenance Procedures and Documentation M 3.1 Inservice Insoection a.
Insoection Scooe (73052. 73755)
The NRC inspector reviewed documents related to nondestructive examination (NDE) equipment, evaluations, and data associated with the following activities:
o Core shroud UT e
Shroud head hold down bolting UT examination e
Jet pump hold down beam UT examination b.
Observations and Findinas The examination data was found to be in accordance with the applicable ISI procedures and ASME Code requirements.
Core shroud UT was performed using EPRI performance demonstrated (PDI)
ultrasonic equipment, in accordance with commitments made to Generic Letter (GL) 94-03,"Intergranular Stress Corrosion Cracking of Core Shrouds in Boiling Water Reactors." The inspector observed portions of the data evaluation by GE, which is ongoing and will be submitted to the NRC per the commitments made to GL 94-03.
The UT of 36 shroud head hold down bolts attached to the steam separator showed no indications of cracking. In addition, the UT examination of 20 jet pump hold down beams attached to the reactor pressure vessel showed no indications of cracking.
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Conclusions i
For the areas observed, NRC and ASME Code requirements were met and no
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violations or deviations were identified. Implementation of this portion of the ISI program appeared to be effective.
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l V. Manaaement Meetinas X1 Exit Meeting Summary The inspectors presented the results of these inspections to Comed management
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listed below at an exit meeting on October 25,1996. Comed acknowledged the findings presented.
The inspector asked the licensee if any materials examined during the inspection should be considered proprietary. No proprietary information was identified.
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PARTIAL LIST OF PERSONS CONTACTED Comed
"D. Ray, Station Manager
"M. Dougherty, Construction Superintendent
"T. Jackson, Site Quality Verification
' A. Kochis, ISI Coordinator
- A. Javorik, System Engineer Manager
"J. Drago, NRC Coordinator C. McKean, Deputy Level lli UT Examiner (SMAD)
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'M. Huber, Senior Resident inspector K. Ihnen, Resident Inspector H. Simons, Resident inspector
- M. Dapas, Branch Chief
'D. Jones, inspector General Electric
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J. Easton, Project Manager
. H. Schlortt, Project Level ill
"Present at exit meeting on October 25,1996.
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INSPECTION PROCEDURES USED IP 73051:
Inservice inspection - Review of Program IP 73052:
Inservice inspection - Review of Procedures IP 73753:
Inservice inspection IP 73755:
Inservice Inspection. Data Review and Evaluation i
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LIST OF ACRONYMS USED
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ASME-American Society of Mechanical Engineers BWR Boiling Water Reactor Plant
DRS Division of Reactor Safety EPRI Electric Power Research Institute GE General Electric GL Generic Letter
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IDNS Illinois Department of Nuclear Safety IR inspection Report ISI Inservice Inspection L2RO7 LaSalle Unit 2 Refueling Outage 7 LAP LaSalle Administrative Procedure NDE Non-destructive Examination NRC Nuclear Regulatory Commission UT Ultrasonic Testing PDI Performance Demonstration initiative PlF Problem Identification Form PDR NRC Public Document Room PT Dye Penetrant Test
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