ML21161A092

Paragon Energy Solutions, LLC, Failures of Size 1 and 2 Freedom Series Full Voltage Reversing Starters

ML21161A092
Person / Time
Site:	Beaver Valley, Millstone, Harris, Prairie Island, Columbia, North Anna
Issue date:	05/03/2021
From:	Bolt T Paragon Energy Solutions
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
P21-03302021, Rev. 1
Download: ML21161A092 (3)

Text

• ~A Paragon Date: 5/3/2021 To: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Fax Number (301)816-5151 10CFR Part 21 Notification: P21-03302021, Rev. 1

Subject:

Failures of Size 1 and 2 Freedom Series Full Voltage Reversing Starters Pursuant to 10CFR 21.21 (d) (3) (ii), Paragon Energy Solutions, LLC is providing written notification of the identification of a defect.

The following information is required per 10CFR 21.21 (d) (4).

(i) Name and address of the individual or individuals informing the Commission.

Tracy Bolt, Chief Nuclear Officer Paragon Energy Solutions, LLC 7410 Pebble Drive Ft. Worth, TX 76118 (ii) Identification of the facility, activity, or the basic component supplied for such facility or such activity within the United States which fails to comply or contains a defect.

Dominion - North Anna Station has identified instances where Size 1 and 2 starters have failed to function as expected in assemblies that were originally supplied by NLI. The Mechanical Interlock exhibited binding that prevented the contactor to close when energized.

The specific part which fails to comply or contains a defect:

Eaton Starter Model AN56DN*, AN56GN*, CN55DN*, CN55GN* style Starters and Contactors.

The identified failed starters are utilized in an application of operating MOVs. This is an intermittent duty application.

Paragon Energy Solutions 7410 Pebble Drive* Fort Worth, Texas* 76118 81 7-284-0077

• Fax 817-590-0484 Page 1 of3

Identification of the firm constructing or supplying the basic component which fails to comply or contains a defect.

Components were originally supplied by Nuclear Logistics, LLC 7410 Pebble Drive, Fort Worth Texas 76118 (iii) Nature of defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply.

Binding of the mechanical interlock preventing the contactor from closing on demand.

(iv) The date on which the information of such defect or failure to comply was obtained.

Date of Discovery: 3/29/2021 (v) In the case of a basic component which contains a defect or fails to comply, the number and location of these components in use at, supplied for being supplied for, or may be supplied for, manufactured or being manufactured for one or more facilities or activities subject to the regulations in this part.

The issue was identified on supplied Size 1, 73262-025-00028 (Date Code: T4515), Size 2, 73262-028-00001 (Date Code: T4215).

T4215 = 42nd week of 2015 T4515 = 45 th week of2015 Starters have been supplied to the identified plants below within the following date range Septeniber 2014 through October 2018. Paragon is in the process of identifying the date codes of the supplied starters and contactors to provide the specific information to the identified plants.

Plant .. -

Beaver Valley Columbia Ernvtech Harris Millstone NEKKRSKO North Anna Prairie Island (vi) 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.

The evaluation being performed by Paragon is expected to be completed by May 29, 2021.

P21-03302021, Rev. 1 Page 2 of3

The component design that exhibited the failure was revised by the original equipment manufacturer (EATON) in October 2018. There have been no reported failures of the interlock mechanism in vintages manufactured before September 2014 or after October 2018.

The recommendations below are based on the specific application.

The reversing starters and reversing contactors are typically wired in a configuration that will electrically lock out one of the contactors when the other one is being energized to prevent both contactors from being energized at the same time. Therefore, the mechanical interlock is not required to prevent both contactors from being closed at the same time when the electrical interlock configuration is being implemented. In this scenario, the mechanical interlocks are not required and can be removed.

(vii) Any advice related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees.

The motor control centers that contain the mechanical interlock should be monitored to ensure that there is no binding during operation.

Please contact me with any questions or comments.

Sin:!1tM Tracy Bolt Chief Nuclear Officer Paragon Energy Solutions 817-284-0077 tbolt@paragones.com Note: Revision 1 was to correct the identified date code and to add the size of the starter and serial numbers of the units that failed.

P21-03302021, Rev. I Page 3 of 3