ML20114C903

Final Deficiency Rept (Rdc 119(84)) Re Dresser Industries Diaphragm Seal Globe Valves,Dresser Figure 3050.Initially Reported on 841029.Progress on Mod to Dresser Diaphragm Seal Globe Valves Will Be Sent by 850415

ML20114C903
Person / Time
Site:	Perry
Issue date:	01/18/1985
From:	Edelman M CLEVELAND ELECTRIC ILLUMINATING CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
(RDC-119(84)), NUDOCS 8501300570
Download: ML20114C903 (2)

Text

,. 5 O THE CLEVEL AN D ELECTRIC ILLUMIN ATING CONiP A!iY P.O. Box 5000 - CLEVELAND. oHto 44101 - TELEPHONE (216) 622-9800 - (LLUMINATING BLDG. - 55 PUBLICSoVARE Serving The Best Location in the Nation

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• MURRAY R. EDELMAN VICE PRESIDENT NUCLEA R Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE: Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Dresser Industries Diaphragm Seal Globe Valves [RDC 119(84)]

Dear Mr. Keppler:

This letter replaces our final 10CFR50.55(e) report dated November 28, 1984, concerning Dresser Industries diaphragm seal globe valves, Dresser Figure 3050.

Mr. R. C. Knop of your office was first notified on October 29, 1984, by Mr. P.

P. Martin of The Cleveland Electric Illuminating Company (CEI) that this problem was being evaluated per our Deviation Analysis Report 212. Based on a revision to the corrective action plan, we now consider resolution of this matter to have interim status.

This report contains a revised description of the deficiency, an analysis of safety implication and revised corrective action being implemented at the Perry Nuclear Power Plant (PNPP). The analysis of safety implication remains unchanged.

Description of Deficiency l

During leak rate testing activities, Dresser diaphragm sea'. globe valves, Figure 3050, were found to be sticking closed or partially open. It was determined that an erroneous leak rate could be obtained if the valve is l thought to be open while, in fact, it is closed. Several of the Dresser diaphragm seal globe valves furnished under CEI Purchase Order P1690 have failed in this manner.

It has now been determined that this problem is apparently caused by insufficient inside diameter clearance between the disc cap and valve body along with sharp edges on the disc cap. Any uneven force applied by the spring

or the diaphragm causes the disc cap to become tilted t.nd bind. This also l resulted in increased friction of the disc cap on the disc guide which is I

thought to have caused the chipping of the " Glide-Aloy" plating on these components noted in the November 28, 1984, report.

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. 46 Mr._ James G. Eepplcr Janu ry 18, 1985 Analysis of Safety Imolication

'Under normal circumstances the failure of these manual valves to operate does not result in any decrease in plant safety. However, since our present procedures ' utilise handwheel operation to determine the position of the manual test connections, a stuck closed test valve could mask a leaking containment isolation valve.- This condition is therefore considered reportable.

Also of concern is the possibility that any valve which must open to perform's safety-related function may not perform that function. However, there are no Dresser Industries' diaphragm seal globe valves at PNPP in.such " active" applications.'

Corrective Action CEI has undertaken a program of modification of the Dresser Industries diaphragm seal globe valves _ associated with the preoperational phase leak rate testing to eliminate the disc cap binding. ,The modification will consist of a t chamfer on the disc cap. Tae amount of.the chamfer will be such that the disc cap cannot bind in the disc guide even when the disc cap is severely tilted.

To date these modifications have proven successful.

The adequacy of the modifications will be verified during preoperational phase leak rate testing. This 'will be accomplished by performance of additional test steps to verify valve operability. If any Dresser Industries : diaphragm seal globe valve-fails _to operate properly during preoperational leak rate testing, it will be disassembled and inspected to determine the cause of failure. The adequacy of the modifications shall be re-evaluated based upon the findings.

Once the adequacy of the modification has been verified, no additional valve operability testing will be needed.

Progress of the modification program and operability verification will be submitted by April 15, 1985.

Please call if there are any questions.

Sincerely, thI ydse Murray R. Edelman Vice President Nuclear Group

-MRE:pab cc: Mr. J. A. Grobe Records Center, SEE-IN USNRC, Site Office Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 Mr. D. E. Keating Atlanta, Georgia 30339 USNRC, Site ' Office Mr. T. E. Meyers, President Director Industrial Valve 0perations Division Office of Inspection and Enforcement Dresser Industries Incorporated U.S. Nuclear Regulatory Commission P.O. Box 1430 i Washington, D.C. 20555 ' Alexandria, LA 71301 -

U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington,_D.C. 20555

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