ML20198R444

Part 21 Rept Re Borg-Warner Nonconforming Valve Guide Matl. Investigation Revealed Nonconforming 10-inch Guide Rails. Valve Guides Replaced.W/One Oversize Drawing

ML20198R444
Person / Time
Site:	Palo Verde
Issue date:	06/06/1986
From:	Ybarra E BYRON JACKSON PUMP
To:	Vaughan L NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20198R447	List: ML20198R444 ML20266E407
References
REF-PT21-86-197-000 PT21-86-197, PT21-86-197-000, NUDOCS 8606100077
Download: ML20198R444 (2)

Text

Byron. Jack:on Pump Divisi:n sons l l

i Borg-Wa'rci industrial Products, Inc.

P.O. Box 2017. Terminal Annex, Los Angeles. Cahfornia 90051 Teleonons 213/587-6171 6 June 1986 United States, Nuclear Regulatory Commission Office of Inspection and Enforcement Washir,gton D.C., 20555 Attention: Larry Vaughan

Subject:

Nonconforming Valve Guide Material Supplied To Arizona Public Service

Reference:

Plant Location:

, a Palo Verde Nuclear Generating Station, Unit 3 Borg-Warner Fluid Controls Valve

Description:

> 10 inch 300 lb. class, ASME Code Section III, Class II.

Valve Assembly No. 77780, S/N 49408, 49409, 49410, 49411.

' Valve Sub-Assembly Drawing 76475:

Deplicting valve guide location.

I As reqtiesfed by your office, please find enclosed the results of our investigation into the subject nonconformance.

" Description Of Nonconformance: On the 14th of April 1986 Byron Jackson Pump Division pas notified of a concern over the ylsual appearance of valve guide rails . The valve, assembly is constructed of 300_ series Stainless Steel.

During inspection of disassembled valves, the guides appeared to be rusted.

Byron Jackson in conjunction with the own'er's designee, Combustion Engineering, r. greed to perform a chemical overcheck on the, guide rail material. This chemical overcheck revealed that the guides were carbon steel.

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" Investigation into The Cause Of Nonconformance: Our investigation has concluded that on February 1979 eight 10" guide rails under part no. 77844-10 were issued from our stock. This is sufficient quantity for four valves.

During inspection, they were rejected for a reworkable dimensional nonconformance and for the part nc. not matching what was required on the Bills of Material. The dimensional nonconformance was dispositioned to rework, however, the part no. discrepancy was not addressed.

When the item was reworked, factory personnel presumed the disposition also required that the rework was to correct the part no. As a result, the part no. was changed and the guide rails were released for assembly.

" Effects Of Nonconformance On Other Nuclear Power Stations None. This nonconformance is isolated to the subject nuclear plant. We have reviewed our Quality Assurance Records for similar discrepancies and have found no other nonconformances of this nature.

" Status Of Nonconformance: The valve guides have been removed and replaced with the correct material."

I hope this information is sufficient. If you have any questions, please do not hesitate to contact me.

Very t ly yours, dhW)1/w E.ld. parra Managd of Quality EWY:kn cc: G. Godwin, Manager Los Angeles Operations W. Klenner, Nuclear Valve Product Manager M. Reilly, Nuclear Valve Engineering Mike Marroni, Combustion Engineering

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