ML20236E485

Corrected Part 21 Rept Re Broken/Cracked Springs in Consolidated Type 3787WA Valves.Valves Incorrectly Identified as Type 3727WA in 870203 & 0702 Ltrs.Unit 1 Springs Received Magnetic Particle Exam

ML20236E485
Person / Time
Site:	Catawba
Issue date:	07/27/1987
From:	Brunson B DRESSER INDUSTRIES, INC.
To:	Cilimberg R NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM), Office of Nuclear Reactor Regulation
References
REF-PT21-87-125-000 PT21-87-125, PT21-87-125-000, NUDOCS 8707310390
Download: ML20236E485 (2)

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DRESSER VALVE AND CONTROLS DMSION Dresser Industries,Inc.

Industrial Volve North American Operations pc Box 5430. Alexandria.Louisana 713cwo July 27, 1987 U. S. Nuclear Regulatory Commission Document Control Desk.

Part 21 Vendor Inspection Branch Washington, DC 20555 Attn: R. L. Cilimberg, Metallurgical Engineer Subj: Duke Power - Catawba Nuclear Station Dresser IVO 10CFR21 File 85-03 Pressure Relief Valve Type 3787KA Broken / Cracked Springs

Dear Mr. Cilimberg:

The reference to Consolidated type 3727WA valves in Mr. R. L. Schaus' letter of February 3,1987, and in my letter of July 2, 1987, is incorrect. The correct valve type is 3787WA as found in R. D. Walsh's report of September 4,1985.

The following is sutrnitted in order to establish an understanding of the quantity of springs rejected and from which units, a) In April, 1985, during routine servicing and hydrostatic plug renoval of twenty type 3787WA, Unit 2, Main Steam Safety Valves, Dresser's Field Service Engineer discovered that two springs were broken. These springs were from valves, serial numbers BS-02904 and BS-02912.

The valves were being serviced following system hydrostatic test, prior to undergoing hot functional test. The remaining 18 springs were visually inspected with no defects noted.

b) Dresser IVO advised Duke Power by letter, dated October 24, 1985, that the springs in the remaining 18 valves from Unit 2, and the 20 valves on Unit 1, should be magnetic particle examined.

c) Magnetic particle examination of the springs from the 20 valves on Unit 1, was performed in Aagust, 1986. Two springs, from valves serial numbers BS-02881 and BS-02889, were rejected. Linear indications were found on the springs inner coil diameter. The letters D34 were stamped on the inner coil and the linear indications propagated from the letter 4.

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O. S. Nuclear Regulatory Commission Page 2 Broken / Cracked Springs d) The remaining 18 springs from Unit 2 will be magnetic particle examined during the Fall of 1987 outage.

I trust that his will clear up any misunderstanding, if not please call me.

One copy is being mailed to your home address to expedite your receipt.

Very truly yours,

. G. Brunson Manager, Quality Systems BGB:bb i

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