ML12219A231: Difference between revisions

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{{#Wiki_filter:FLOWSERVE August 3, 2012 US Nuclear Regulatory Commission Document Control Desk 11545 Rockville Pike Rockville, MD 20852-2746 Flow Control Division Anchor/Darling Valves BW/IP Valves Edward Valves Valtek Control Products Worcester Valves
==Subject:==
USNRC 10CFR Part 21 Notification Ref: Flowserve Evaluation Report No. 10 CFR 21-68 Seal Cap for Kerotest 3/4, 1, 1-1/2, and 2 Y-Type Globe Valves Gentlemen, This is to notify the US Nuclear Regulatory Commission, in accordance with the provisions of 10CFR-Part 21 of a deviation identified by Flowserve Corporation.
===Background===
On July 17, 2012, Duke Power -McGuire NPP notified Flowserve Corporation that they had attempted to install a Seal Cap supplied by Flowserve on a Kerotest 1-1500 Y-Type Globe Valve.They found that the Seal Cap could not be installed on the valve due to interference with the Valve Stem.Discussion The Seal Cap is used to contain leakage past the Valve Diaphragm.
The Seal Cap fits over the Valve Stem after Handle removal and is screwed onto the Yoke until it contacts the top of the Body. It is then seal welded to the Body to create a leak tight cap. At this point the Seal Cap is considered pressure retaining.
Inspection of the Seal Cap revealed an inside flat bottom in lieu of the conical bottom shown on the drawing. The conical drill point allows clearance-for the valve stem when the Seal Cap is installed on the valve. Review of a layout shows the Seal Cap with a Flat bottom cannot be completely installed whether the valve is open or closed.Flowserve U S Inc Flow Control Division Raleigh Operations J: PO Box 1961 1900 South Saunders-Street Raleigh, NC Toll Free: 1-800-225-6989 Phone: 1-919-832-0525 Facsimile:
1-919-831-3369 www.flowserve.com
--tJ~4Ld US NRC August 3, 2012 Page 2 of 2 Conclusion The Seal Cap with a flat bottom cannot be properly installed on the Kerotest Series R9900 size 1/2 to 2 Valves for which it was designed.
The Valve Stem will prevent complete installation and the ability to seal weld the Seal Cap to the Body. The Seal Caps supplied would not be available at the Nuclear Power Plant site for an urgent repair if required.The following Nuclear Power Plant Utilities were provide these Seal Caps without the conical shaped area.TVA -Purchase Order# 00020077-00050 and 00020077-00018 First Energy -Purchase Order# 45108999, and 45254808 Alabama Power -Purchase Order# QP040387, QP040872 and QP060575 Duke Power -Purchase Order # NM18494 001, NM25245, 00108212 and 00124677.Based on the above, the Nuclear Utilities need to be notified concerning this deviation so that an evaluation may be performed to determine if this constitutes a defect that could create a substantial safety hazard.Respectfully submitted, Robert D. Barry Manager, Quality Assurance Flowserve Corporation Flow Control Division 1900 S. Saunders St.Raleigh, N.C. 27603}}

Revision as of 23:22, 1 August 2018

Us NRC 10CFR Part 21 Notification from Flowserve on Seal Cap for Kerotest 3/4, 1, 1-1/2, and 2 Y-Type Globe Valves
ML12219A231
Person / Time
Site: Mcguire, McGuire  Duke Energy icon.png
Issue date: 08/03/2012
From: Barry R D
Flowserve Corp
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML12219A231 (2)
v • d • e


Text

FLOWSERVE August 3, 2012 US Nuclear Regulatory Commission Document Control Desk 11545 Rockville Pike Rockville, MD 20852-2746 Flow Control Division Anchor/Darling Valves BW/IP Valves Edward Valves Valtek Control Products Worcester Valves

Subject:

USNRC 10CFR Part 21 Notification Ref: Flowserve Evaluation Report No. 10 CFR 21-68 Seal Cap for Kerotest 3/4, 1, 1-1/2, and 2 Y-Type Globe Valves Gentlemen, This is to notify the US Nuclear Regulatory Commission, in accordance with the provisions of 10CFR-Part 21 of a deviation identified by Flowserve Corporation.

Background

On July 17, 2012, Duke Power -McGuire NPP notified Flowserve Corporation that they had attempted to install a Seal Cap supplied by Flowserve on a Kerotest 1-1500 Y-Type Globe Valve.They found that the Seal Cap could not be installed on the valve due to interference with the Valve Stem.Discussion The Seal Cap is used to contain leakage past the Valve Diaphragm.

The Seal Cap fits over the Valve Stem after Handle removal and is screwed onto the Yoke until it contacts the top of the Body. It is then seal welded to the Body to create a leak tight cap. At this point the Seal Cap is considered pressure retaining.

Inspection of the Seal Cap revealed an inside flat bottom in lieu of the conical bottom shown on the drawing. The conical drill point allows clearance-for the valve stem when the Seal Cap is installed on the valve. Review of a layout shows the Seal Cap with a Flat bottom cannot be completely installed whether the valve is open or closed.Flowserve U S Inc Flow Control Division Raleigh Operations J: PO Box 1961 1900 South Saunders-Street Raleigh, NC Toll Free: 1-800-225-6989 Phone: 1-919-832-0525 Facsimile:

1-919-831-3369 www.flowserve.com

--tJ~4Ld US NRC August 3, 2012 Page 2 of 2 Conclusion The Seal Cap with a flat bottom cannot be properly installed on the Kerotest Series R9900 size 1/2 to 2 Valves for which it was designed.

The Valve Stem will prevent complete installation and the ability to seal weld the Seal Cap to the Body. The Seal Caps supplied would not be available at the Nuclear Power Plant site for an urgent repair if required.The following Nuclear Power Plant Utilities were provide these Seal Caps without the conical shaped area.TVA -Purchase Order# 00020077-00050 and 00020077-00018 First Energy -Purchase Order# 45108999, and 45254808 Alabama Power -Purchase Order# QP040387, QP040872 and QP060575 Duke Power -Purchase Order # NM18494 001, NM25245, 00108212 and 00124677.Based on the above, the Nuclear Utilities need to be notified concerning this deviation so that an evaluation may be performed to determine if this constitutes a defect that could create a substantial safety hazard.Respectfully submitted, Robert D. Barry Manager, Quality Assurance Flowserve Corporation Flow Control Division 1900 S. Saunders St.Raleigh, N.C. 27603

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