ML20100L002
| ML20100L002 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 11/28/1984 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-84, REF-PT21-85-009-000 (RDC-121(84)), PT21-85-009-000, PT21-85-9, RDC-121(84), NUDOCS 8412110385 | |
| Download: ML20100L002 (2) | |
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Ja2 Tile CLEVELAND ELECTRIC ILLUMIN ATING COMPANY P.o. box 5000. CLEVELAND, oHlo 44101 - TELEPHONE (216) 622-9800 - ILLUMINATING BLOG. - 5$ PUBLICSQUARE Serving The Best Location in the Nation
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November 30, 1984 VICE PRESIDENT NUCLEAR Mr. James G. Keppler Regional Admilistrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Ferry Nuclear Power Plant Docket isos. 50-440; 50-441 Borg-Warner 20 Inch Gate Valve
[RDC 121(84)]
Dear Mr. Kcppler:
This letter serves as our interim report pursuant to 10CFR50.55(e) relative to the failure of a Borg-Warner Gate Valve to properly operate.
Mr. Frank Jablonski of your office was notified on October 31, 1984, by Mr. R. G. Solt of The Cleveland Electric Illuminating Company (CEI) that this problem was being evaluated per our Deviation Analysis Report 213.
This report contains a description of the deficiency, the planned corrective action and the date for filing our next report on the subject.
Description of Deficiency During reactor pressure vessel flushing operations, it was noted that a 20 inch ASME Class 1 gate valve, IN27-F560A, manufactured by the Nuclear Valve Division of Borg-Warner would not fully open.
This valve was disassembled and reinspected to determine the cause of the failure to properly operate. The welded-in body gate guides were found to be damaged due to galling caused by the gate.
One additional 20 inch gate valve, IN27-F560B, identical to the failed valve with regards to valve type and installation orientation was cycled twenty times satisfactorily and disassembled for internal inspection. The guides were found to be " cast-in" in lieu of the " weld-in" guides installed in the valve which failed. While there was some indication of gate rolling there was no apparent galling or guide damage.
Contributing causes for the failure of IN27-F560A appear to be related to the following problems:
Guide material is not as required by CEI Procurement Specification 521-02 or as indicated on Borg-Warner Fluid controls assembly drawing 81040-2.
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^Mr.-Jrmes G. Kapp1Gr- -Nsvambar 28, 1984 A Borg-Warner design error allowed the guides to be welded in a position which creates a misalignment between the gate and the body guide rails.-
Subsequent to our identification of this problem, on November 21, 1984, Borg-Warner filed a 10CFR21 report. In this notification they also stated that
.during their snalysis of valve IN27-560A, it was discovered that a second design problem existed. The fillet veld for welding in the guides to the body is'not adequate for any valve which might be subjected to a differential pressure in excess of 600 psi.during cycling of the valve. They further stated that review of the'CEI valve data sheets indicated that four (4) valves.rould be subjected to a differential pressure above the 600. psi range.
Corrective Action b
i CEI has contracted with an ASME Certified valve service company who has replaced the discrepant gate guide and corrected the alignment problems associated with valve IN27-F560A. The gate guides were also replaced in valve IN27-F560B in the interest of long-term reliability.
CEI is investigating the applications of Borg-Warner gate valves elsewhere in i
j the Perry design in order to address the broader implications of these material, workmanship, and design problems.. Borg-Warner has also been directed to' address these implications. In addition, Borg-Warner has been directed to f
address the cause, extent, and resolution of the fillet weld concern. CEI is f
presently awaiting Borg-Warner's response to these directives prior to I-formulation and implementation of a comprehensive resolution. Our final report i
on this subject will be submitted by March 15, 1985.
Please call if there are any additional questions.
J Sincerely,n A
f-urray R. Edelman i
Vice President l
Nuclear Group cc:
Mr. J. A. Grobe USNRC, Site Office Mr. D. E. Keating
-USNRC, Site Office j
)
Director i
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission
-Washington, D.C.
20555 U.S. Nuclear Regulatory Commission
-c/o Document Management Branch Washington, D.C.
20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339