ML14364A168

Flowserve Corp., Vermont, Formal Evaluation of Deviations Reported - Notification of Defect - Watts Bar II

ML14364A168
Person / Time
Site:	Watts Bar
Issue date:	06/02/2014
From:	Gobbi D Flowserve Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML14364A168 (2)

Text

FLOWSERVE NUCLEAR PRODUCTS OPERATIONS 2 June 2014 Vernon Nuclear Pump Operations, Vernon, CA 90058 FORMAL EVALUATION OF DEVIATIONS REPORTED - NOTIFICATION OF DEFECT To: Document Control Desk, Nuclear Regulatory Commission From: David P. Gobbi, Nuclear Quality Program Manager, Flowserve Nuclear Products Operations

Reference:

IINTERIM REPORT dated 2 April 2014 Date of Discovery by Owner ( Customer: 14 January 2014; recognized / re-evaluated as a trend 17 March 2014 Original Date of Notification to Flowserve: 14 January 2014 Internal

Reference:

Flowserve Internal Corrective Action: 199892,dated 14Jan. thru- 205953 (most recent) dated 15 March

Subject:

Final Evaluation of Deviations - Notification of Defect - Watts Bar II

Purpose:

To provide the Commission with a Notification of a Defect as Pursuant to 10 CFR 21.21 (d) (1)

This is to advise that a Final Formal Evaluation of the deviations involving equipment supplied to TVA Watts Bar by Flowserve Vernon during 2010 and 2011 has been conducted on May 30, 2014. This Final evaluation was conducted to determine whether the deviations reported by the Licensee on (2) Centrifugal Charging Pumps and (2) Safety Injection Pumps during the Licensee installation phase presented a potential to impact safety.

Descriptions of Reported Conditions: (Each of the 8 Conditions I Deviations were reported through established processes and entered into Flowserve's Internal Corrective Action System) The reported conditions were concerning the bearing housing(s)

1. Bearing Housing - including internal components - were supplied with dimensional, geometric and workmanship (assembly) deviations that affected: bearing housing machining; bearing anti-rotation and housing alignment dowels; and deviations in assembly/installation of the bearing housing baffle locking features.

Immediate Action: Hardware - Related

1. Flowserve reacted to the Licensee reported conditions through on-site and off-site services by Management, Field Service, Engineering and Quality Assurance

2. Flowserve conducted a Root Cause Analysis to identify anomalies and factors that would have contributed to these deviations Status of Delivered Equipment:

1. All equipment has been rectified for use. Future recommended actions include on-site inspection and possible replacement of alignment dowels.

2. Deviations concerning Safety have been rectified..

Long Term Action:

1. Each of the eight reported deviations have been evaluated for its respective impact to safety in accordance with the NPO Nuclear Quality Assurance Manual and its supporting procedures Formal Evaluation

Conclusion:

1. The dimensional and geometric deviations found within the bearing housing, if operable through the commissioning phase, would have resulted in either a reduced operating life, or would not be operable. Either situation has been determined to present a potential substantial safety hazard.

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Page 2 of 2 FORMAL EVALUATION OF DEVIATIONS REPORTED - NOTIFICATION OF DEFECT (continued)

Extent of Condition Execution:

1. A thorough review of historical data representing performance indicators from a timeline of 2010 and 2011 had been completed.

2. The data was obtained from customer complaint logs, internal CARs and similar job histories that shared common factors, including personnel Extent of Condition

Conclusion:

1. While the RCA exposed certain areas for improvement, there was no evidence that the reported conditions were systemic, thus supporting the conclusion that these deviations were of an isolated case

2. As this evaluation and its subject deviations are of an isolated, job-specific nature, there is no immediate recommended action to be conducted by other Licensee locations Corrective Measures:

1. Flowserve has since engaged in programs instituting Operational Excellence which incurs the Human Performance Tools

2. Areas that have been addressed through the Root Cause Analysis have been and continue to be incorporated within the Vernon Operation to reinforce a culture of continuous improvement and emphasizes the use of human performance tools I may be reached at 980-722-6770 or by email, at dgobbi@flowserve.com.

Cc: Ed Villalva, Facility Quality Manager, Vernon NPO Mike Eftychiou, Manager NPO Engineering Ronak Upadhyaya, Manager, NPO Analytical Engineering Ihab Botros, General Manager, Vernon Operations Steven Hoisington, Vice President, Quality, Flowserve Corporation David P. Gobbi, Nuclear Quality Program Manager Nuclear Products Operations Flowserve Corporation it

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