IR 05000324/1987034
| ML20235F550 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 09/22/1987 |
| From: | Jape F, Tingen S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20235F523 | List: |
| References | |
| 50-324-87-34, IEB-85-003, IEB-85-3, NUDOCS 8709290199 | |
| Download: ML20235F550 (3) | |
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UMITED STATES
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Report.No.,t 50-324/87-34 Licensee:
Carolina Power and Light Company P. O. Box 1551 Raleigh, NC 27602 Docket No.:
50-324 License No.:
" Facility Name: ~ Brunswick l'
Inspection Conducted:
September 14-15, 1987
- 9 fhY Inspector:
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Date Signed S.
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Approved by:
. h 7/2L/N F. Jape, Section Chief. V I Date' Signed.
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Engineering Branch Division of Reactor Safety SJMMARY i
Scope:
This routine, announced inspection was in the area of IE Bulletin No. 85-03, " Motor-Operated Valve Common Mode Failures During Plant Transient Due to Improper Switch Settings."
Results:
No violations or deviations were identified.
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8709290199 870924
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REP 0RT DETAILS 1.
Persons Contacted Licensee Employees
- K. Enzor, Director, Regulatory Compliance R. Poulk, Senior Specialist, Regulatory Compliance M. Haynes, Senior Specialist, Maintenance
- C. Schacher, Project Engineer, Maintenance
- S. Boyce, Project Engineer, Emergency Core Cooling Systems
Other licensee employees contacted included construction craftsmen,
engineers, technicians, operators, mechanics, security force members, and
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office personnel.
Other Organizations Nuclear Power Division, Babcock and Wilcox - D. Renfro Field Service Engineer, Plant Equipment Services NRC Resident Inspectors W. Ruland, Senior Resident Inspector L. Green, Resident Inspector
- Attended exit interview 2.
Exit Interview The inspection scope and findings were summarized on September 15, 1987, with those persons indicated in paragraph 1 above.
The inspector described the area inspected and discussed in detail the inspection findings. No dissenting comments were received from the licensee.
The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspectors during this inspection.
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Licensee Action on Previous Enforcement Matters This subject was not addressed in the inspection.
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Unresolved Items
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Unresolved items were not identified during this inspection.
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5.
Follow-up on IE Sulletiii 85-03, " Motor Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings."
(Module 25573)
The inspector held discussions with responsible licensee personnel concerning their progress in the actions required by IEB 85-03.
The
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licensee. indicated that all of the IEB Motor Operated Valves (MOVs) for Brunswick Unit I were completed using the Babcock and Wilcox (B&W)
developed Motor Actuator Characteristic (MAC) program.
This method was developed to demonstrate operability of valves identified by this bulletin.
The Unit 1 MOVs were tested by B&W personnel with the licensee witnessing. MOV testing was in progress during this inspection for Unit 2 MOVs. Twenty-seven Unit 2 valves are scheduled to be tested utilizing the MAC program to satisfy IEB 85-03 requirements,12 valves are to be tested while Unit 2 is critical and the remaining 15 valves during the 1988 refueling outage. Unit 2 MOVs are to be tested by licensee personnel with a B&W representative witnessing a portion of the testing.
The inspectar witnessed the licensee perform MAC testing of Unit 2 MOV F010, Reactor Core Isolation Cooling pump suction valve, which was the first of the 27 Unit 2 valves to be tested to satisfy IEB 85-03 require-ments.- The inspector interviewed licensee test personnel and the B&W representative present during F010 testing.
The MAC testing of valve F010 consisted of measuring motor current, force on the Bellville spring pack and worm shaft displacement during valve operation.
These parameters were inputted into tha MAC computer which calculated stem opening and closing torques. Per the B&W representative, the MAC program is being modified to measure several other MOV parameters to further aid in valve testing.
Results of the F010 testing indicated that the stem closing torque was too high.
The value c.ticulated by MAC was 74 foot-pounds; the specification was between 22 and 50 foot-pounds.
As corrective action the F010 motor operator torque switch and after several adjustments and subsequent tests a satisfactory shutting torque of S0 foot-pounds was obtained.
Per the licensee all Brunswick MOVs utilize the torque switch to secure the valve motor in the closing direction only, during valve opening the torque switch is jumpered out and a limit switch to de-energize the motor.
While testing F010, no problems were encountered with the MAC program, the only difficulty was with adjustment of the torque switch to obthin a satisfactory shutting torque.
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