IR 05000219/1993008
| ML20045D514 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 06/01/1993 |
| From: | Eapen P, Gregg H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20045D508 | List: |
| References | |
| 50-219-93-08, 50-219-93-8, NUDOCS 9306290089 | |
| Download: ML20045D514 (6) | |
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i U.S. NUCLEAR REGULATORY COMMISSION
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REGION I
REPORT NO.
50-219/93-08
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DOCKET NO.
50-219
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LICENSE NO.
DPR-16 l
LICENSEE:
GPU Nuclear Corporation j
FACILITY NAME: Oyster Creek Nuclear Generating Station INSPECTION AT: Forked River, New Jersey INSPECTION I
CONDUCTED:
May 3 - 7,1993
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INSPECTOR:
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3 H. I. Gregg, Sr. Rdador Engineer
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Systems Section, EB, DRS b D APPROVED BY:
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Dr. P. K. Eapen, Chief, Systems Date Section, EB, DRS 9306290089 930618 PDR ADOCK 05000219 G
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Areas Inspected: Design modifications, corporate and site activities in suppon of Oyster
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Creek, and overall communications between corporate and site engineering.
Results: Engineering was effective in support of design modifications and recent organization changes appear to have strengthened engineering capabilities.
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1.0 DESIGN CIIANGES AND ENGINEERING SUPPORT (37700)
The objectives of this inspection were to review the licensee's site engineering organizations, engineering support of design modifications and to assess the licensee's safety perspectives related to these changes.
2.0 DESIGN MODIFICATIONS The following modifications performed during cycle 14R were reviewed by the inspector.
Station blackout (BA 402965) tie-in of Forked River combustion turbines as an
alternate AC power source to mitigate a station blackout event. The inspector observed the 13.8KV stepdown transformer installation, concrete trenching for the cable runs, and the metal riser for the cable penetrations to the turbine building. The inspector reviewed the testing details of the completed modification and determined that effective engineering was performed in the evaluation, test verification, and resolution of a tripped differential sensing relay that occurred during testing.
Valve Maintenance and Overhaul Project (BA 323624). This modification was a
large scale corrective and preventive maintenance upgrade (inspecdon, repair, and replacement) of over 100 important valves. This was one of three 14R pilot projects that involved team concepts that was effectively performed with good engineering management.
Drywell sandbed removal (BA 402950). This major outage modification completed in
the 14R outage included boring (10) 20" diameter manway holes approximately 8 ft.
long through the concrete drywell shield wall, removal of the sandbed, inspections and evaluations of the drywell exterior surfaces and wall thickness, and repair of the floor and drains under the drywell. This modification successfully identified and corrected significant findings that contributed to a long standing drywell corrosion problem. Continuous engineering direction and involvement was evident throughout this modification.
t Torus Interior Coating Inspection (BA 328321). The torus coating inspection has
been an ongoing project since the 10R outage. Thorough inspections and tests on random bhsters were made in torus bays 1 to 10. Several bare patches showed no measurable thickness loss, there was little change in blister characteristics, no significant corrosion was observed, and there was no increased degradation. The test patch areas of bays 6 and 7 that were mapped in outage 13R were reinspected and no significant changes were observed. This was another good engineering effor._
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- Service Water Radiation Monitor Suction and Return Line Upgrade (MM 402857).
This modification relocated the supply to a 3" branch connection above the seal well to eliminate air binding. The return line was also relocated to increase the static head and provide additional flow force. This modification corrected the system's inability to achieve flows greater than 10 gpm. The inspector observed the installation and verified that the modification was effective in increasing pump flow.
Service Water Pipe Repair (BA 323677). A small ground water leak observed by the
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licensee's staff shortly before the 14R outage, was identified as service water through dye injection and monitoring. The pipe repair, made during the outage, required a major excavation and extensive supports. Effective engineering was evident in the performance of this modification and prompt repair of a service water leak.
The inspector reviewed each of the above modification design descriptions and safety evaluations and found them to be well planned, technically detailed, and fully descriptive of the required installation. The inspector noted that the engineering personnel had considerable expertise on drywell wall thickness monitoring and torus coatings. Engineering personnel also effectively monitored each of the modification installations.
3.0 SITE ENGINEERING ORGANIZATIONS A system engineering organization (reporting to corporate Technical Functions) has been implemented effective March 24,1993.. Organizational changes were made in management and staffing of both' system and plant engineering. The former Technical Functions site director was appointed Plant Engineering director and the former chairman of the Process Re-engineering Program (PREP) team, a former plant engineering director, was appointed Site Technical Functions director.
Staffing of plant engineering has decreased from 41 to 24 with the reassignment of 17 engineers to system engineering. System engineering now has 24 engineers, including seven permanent transfers from corporate engineering. There is a net increase of 7 engineers at the site, because of this restructuring.
Projects engineering at site (reporting to corporate projects) was increased by three permanent positions and several additional increases are contemplated. Engineering and Design, tasked with mini-modifications, has a permanent site staff of 4 engineers from varied disciplines.
Restructuring of the site engineering organizations, the managerial changes, and additional staffing appears to have strengthened site engineering capabilities. The inspector noted there was excellent cooperation among the above engineering groups.
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4.0 ENGINEERING COMMUNICATIONS The inspector attended several 8:15 a.m. plan-of-the-day meetings. These meedngs were.
well run and were attended by high level management and supervisors of the site engineering organizations. The inspector also attended the recently established 7:50 a.m. daily engineering briefing meeting, a recent engineering initiative, where issues of the 7:30 a.m.
meeting were discussed by the managers and supervisory representatives of plant engineering, system engineering, projects, and engineering and design. This meeting was to assign engineering task responsibilities and to make engineering managers aware of the issues. The daily engineering briefing meetings and recent organizational changes have resulted in improved communications.
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5.0 TIIE ENGINEERING INVOLVEMENT IN OUTAGE 14R The inspector reviewed the licensee's 14R outage (November 28,1992, - February 16, 1993)
general performance and specific engineering involvement in outage activities. The inspector determined the 14R outage was the most successful since the 1970's time frame. All the major goals were achieved such as duration, cost, radiation dose, plant startup, post outage capacity, and reduced drywell unidentified leakage. The planned 83-day outage was completed in 80 days, unidentified leak rate was a low <0.5 gpm, plant startup was achieved without equipment problems or trips, and capacity has been a continuous 100%
since startup (for 80 days at the time of this inspection).
Reasons for the success included a dedicated outage management and staff, excellent work planning completed in advance of the outage, incorporating lessons learned from the 13R outage, elimination of use of contract persomiel, and the ability of the outage team to expeditiously address unforeseen problems.
Effective engineering was evident in the quality of the modification packages, in part, due to the notable accomplishment of performing the engineering for the 14R modifications in-house and completion of design engineering packages well in advance of the outage. Corporate engineers and their management from engineering and design and from projects supported site activitics on a full-time basis during the outage.
6.0 L XIT MEETING The inspector met with the licensee's representatives at the conclusion of the inspection on May 7,1993, to summarize the f' dings of this inspection. Attendees at the exit meeting are m
listed in Attachment 1. The licensee acknowledged the inspector's findings.
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ATTACHMENT 1 Persons Contacted GPU Nuclear
- W. Behrle Plant Engineering Director P. Czaya Manager of Licensing
- J. DeBlasio Manager, Plant Engineering
- B. DeMerchant Licensing Engineer J. Hildebrand 14R Outage Director
- C. Lefler Manager, Projects Technical Functions S. Saha Materials Engineer, Engineering and Design
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D. Shivas Project Engineer E. Woznicki Project Engineer U.S. Nuclear Regulatory Commissio.n
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- R. Barkley Acting Senior Resident inspector
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- Denotes presence at exit meetings on May 7,1993.