ML20012G326

Part 21 Rept Re Borg-Warner Bolted Bonnet Swing Check Valve Failing to Close During Preoperational Testing.Caused by Internal Body Wall Protrusions Resulting from Intersecting Machine Bores.Design Mods Will Be Implemented

ML20012G326
Person / Time
Site:	Comanche Peak
Issue date:	02/18/1993
From:	Gibson D BW/IP INTERNATIONAL, INC. (FORMERLY BYRON JACKSON
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-93 NUDOCS 9302240008
Download: ML20012G326 (4)

Text

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gg# BW/IP International, Inc. -

IP Valves 2300 Venen Mem E at.1 - CaMorma - P13 567 6171 Pump Vemc.n 97JM fan Dmston Avenue 213 567 Bf49 l

February 18, 1993 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Gentlemen:

This letter transmits a notification of defects and nonconformances required by ,

10CFR - Part 21. The attached notification, CFRN-9302, reports a condition which occurred at Texas Utilities, Comanche Peak Steam Electric Station.

• Very Truly Yours, N l D. A. Gibson Manager Nuclear Products Operations cc: Mr. F. Costanzo, Manager of Engineering Mr. R.D. Ham, Manager of Quality Mr. K.A. Huber, Technical Liaison Mr. W.A. Klenner, Product Manager Mr. K.B. Lemmon, Field Service Operations Attachment b

220081 9302240008 930218 ,

PDR .ADOCK 05000445 --

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4 10 CFR. PART 21, NOTIFICATION (BW/IP Reference No. CFRN-9302)

NAME AND ADDRESS OF THE INDIVIDUAL OR INDIVIDUALS = INFORMING THE COMMISSION:

Mr. David Gibson BW/IP International, Inc.

Pump Division 2300 E. Vernon Avenue Vernon, CA 90058 (213) 587-6171 For Technical Information

Contact:

Dr- Kent Huber k

IDENTIFICATION OF THE FACILITY, THE ACTIVITY, OR THE BASIC '

COMPONENT SUPPLIED FOR SUCH FACILITY OF SUCH ACTIVITY WITHIN THE UNITED STATES WHICH FAILS TO COMPLY OR CONTAINS A DEFECT: ,

Texas Utilities, Comanche Peak Steam Electric Station Basic Component: 4-inch 150# Bolted Bonnet Swing Check Valve TU Tag No. 2CC-0693 BW/IP Part No. 75580 IDENTIFICATION OF THE FIRM CONSTRUCTING THE FACILITY OR SUPPLYING THE BASIC COMPONENT WHICH FAILS TO COMPLY OR CONTAINS A DEFECT:

BW/IP International, Inc.

Successor to:

Borg-Warner Nuclear Valve Division 7500 Tyrone Avenue  !

Van Nuys, CA 91409 l

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NATURE OF THE DEFECT OR FAILURE TO COMPLY AND THE SAFETY HAZARD WHICH IS CREATED OR COULD BE CREATED BY SUCH DEFECT OR FAILURE TO COMPLY:

A Borg-Warner swing check valve failed to fully close during pre-operational testing. The valve was ,

radiographed and the disk was found to be lodged in the full open position. Subsequent disassembly revealed four '

points of contact between the disk-swing arm assembly and the body. The contact points occurred at the junction of the two machined bores perpendicular to .the flow direction. All other Borg-Warner valves tested at the  ;

utility have functioned properly. Proper function was also supported by the results of acoustic monitoring.

Several of these valves exhibited similar evident of  ;

contact but functioned properly.

Failure to close is attributable to the internal body wall protrusions which result from the intersecting machine bores. ,

THE DATE ON WHICH THE INFORMATION OF SUCH DEFECT OR FAILURE TO COMPLY WAS OBTAINED:

The incident was initially reported to BW/IP on 18 December 1992. Additional information has subsequently been supplied by Texas Utilities.

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IN THE CASE OF A BASIC COMPONENT WHICH CONTAINS A DEFECT OR FAILS TO COMPLY, THE NUMBER.AND LOCATION OF ALL SUCH COMPONENTS IN USE AT, SUPPLIED FOR, OR BEING SUPPLIED FOR ONE OR MORE FACILITIES OF ACTIVITIES SUBJECT TO THE REGULATIONS:

This notice appl 3-; to all Borg-Warner 4, 6, 8, and 10-inch, 150 and 3i 0#, bolted bonnet swing- check valves ,

which have a two pace forged body construction.

THE CORRECTIVE ACTION WHICH HAS BEEN, IS BEING, OR WILL BE TAKEN: ,

THE NAME OF THE INDIVIDUAL OR ORGANIZATION RESPONSIBLE FOR THE .

ACTION: AND THE LENGTH OF TIME THAT HAS BEEN OR WILL BE TAKEN TO COMPLETE THE ACTION: 5 Corrective actions are:

Inspect installed valves for evidence of disk-body contact at the protrusions. If evidence of contact is observed, protrusions should be removed and blended to  ;

the internal body contour.

For new valve applications, design modifications will be  !

implemented to assure proper operating clearances between the disk and valve body. i I

F ANY ADVICE RELATED TO THE DEFECT OR FAILURE '"O COMPLY ABOUT THE l FACILITY, ACTIVITY, OR BASIC COMPONENT THAT HAS BEEN, IS BEING, OR WILL BE GIVEN TO PURCHASERS:

BW/IP should be contacted for details and assistance.

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