ML22021A029
| ML22021A029 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley, Dresden, Browns Ferry, Surry  |
| Issue date: | 11/24/2021 |
| From: | Darrell Roberts Engine Systems |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 10CFR21-0133 | |
| Download: ML22021A029 (6) | |
Text
1111 12:40:10p.m.
11-24-2021 ENGINE SYSTEMS, INC.
175 Freight Road Rocky Mount, NC 27804 Date:
Company:
Fax Number:
Verification No.:
Reference:
From:
Page:
Dear Sir/ Madam:
TELEFAX November 24, 2021 NRC Operations Center 301/816-5151 301/816-5100 Report No. 10CFR21-0133, Rev. 0 Dan Roberts 1 of 6 Telephone: 252/977-2720 Fax: 252/446-1134 Following this cover is a copy of our report 10CFR21-0133, Rev. 0, for a 1 0CFR21 reportable notification on a swing check valve, P/N ESl50359.
A copy of this report will be mailed to the NRC Document Control Desk and to our affected nuclear customers.
Should you have questions, please let us know.
Sincerely, ENGINE SYSTEMS, INC.
Uf4/r Dan Roberts Quality Manager Quality Performance With Pride 1 /6
1111 ENGINE SYSTEMS, INC.
175 Freight Road, Rocky Mount, NC 27804 12:40:24p.m.
11-24-2021 Telephone: 252/977-2720 Fax: 252/446-1134 Report No.
10CFR21-0133 Rev. 0:
11/24/21 10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE COMPONENT:
Swing Check Valve, P/N ESl50359 SYSTEM:
Emergency Diesel Generator CONCLUSION:
Reportable in Accordance With 10CFR21 Prepared By:
h~
~
Engineering Manager Date: ll lvJ Lii Reviewed By:
a_ (MJ-Date:,,/ 2'1 /':<J Quality Manager Quality Performance With Pride 2 /6
1111 12:40:35p.m.
11-24-2021 3 /6 Report No.
1 0CFR21-0133 Record of Revisions Page:
1 of 1 REV DATE PAGE DESCRIPTION 0
11/24/21 Original Issue.
1111 12:40:43 p.m.
11-24-2021 4/6 Report No.
Revision:
Date:
11/24/21 Page:
1 of 3 Pursuant to 10 CFR 21.21ldll4l. ESI is presenting the required information as follows:
(i) Name and address of the individual or individuals informing the Commission.
Dan Roberts John Kriesel Quality Manager Engineering Manager Engine Systems Inc.
Engine Systems Inc.
175 Freight Rd.
175 Freight Rd.
Rocky Mount, NC 27804 Rocky Mount, NC 27804 (ii) Identification of the basic component supplied within the United States which fails to comply or contains a defect.
Swing Check Valve, PIN ES/50359 (iii) Identification of the firm supplying the basic component which fails to comply or contains a defect.
Engine Systems Inc. (ES/)
(iv) Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect offailure to comply.
The hinge pin retainer plug used on check valve PIN ES/50359 may exhibit low breakaway torque and thus minimal resistance to loosening when subjected to engine operating vibrations. Consequently, if the plug were to completely dislodge, followed by the associated hinge pin, the pressure boundary of the lube oil system would be compromised and oil would discharge through the 3/16" diameter opening. ES/ was notified by a nuclear customer of such an occurrence on a check valve that had been recently installed.
Following notification, ES/ inspected remaining check valves in inventory and confirmed an issue where the plug exhibited low breakaway torque that could potentially lead to unintended loosening.
PIN ESl50359 is a 112" female NPT, stainless steel swing check valve used specifically for EMO engine applications in the gallery fill line between the lube oil cooler and main engine pressure pump discharge elbow. During standby conditions, the valve allows forward flow of heated lube oil to the engine. During engine operation, the valve closes to prevent reverse flow of main lube oil. The plug retains the hinge pin within the valve and utilizes straight threads, thus requiring a sealing washer. The material of the sealing washer is PTFE. Due to the relatively soft nature of the PTFE and small surface area, the applied torque must be minimized to prevent deformation or extrusion. These factors, in conjunction with the relatively low friction coefficient of PTFE, lead to a low breakaway torque and the potential for loosening. See Figure 1 & 2 below for a visual depiction of the swing check valve. Figure 3 on the following page shows a typical installation.
Hinge Pin Plug and PTFE Seal Figures 1 & 2: View of Swing Check Valve P/N ESl50359
1111 12:41:51 p.m.
11-24-2021 5/6 Accessory Rack Frame (Right Side)
---'f. Crankshaft It. Unit 1 /4" 52 50 I
U5-13/16" Figure 3: Typical Check Valve Installation (Item 31 shown)
Report No.
Revision:
Date:
Page:
(v) The date on which the information of such defect or failure to comply was obtained.
November 9, 2021 1 0CFR21-0133 a
11/24/21 2 of 3 Accessory Rack Frame (Left Side)
(vi) 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.
Part Customer Customer PO Qty C-of-C Date ESI Order Number Shipped Tennessee Valley Authority-5947631 9
01/10/20 3020300 Brown's Ferry Exelon - Dresden 00000703-13313 3
01/29/20 3020381 Tennessee Valley Authority -
6005163 2
02/10/20 3020391 Brown's Ferry First Energy Corp - Beaver Valley 45560499 1
03/02/20 3020181 Exelon - Dresden 00000703-13326 1
03/02/20 3020484 ESl50359 Dominion Virginla Power -
Surry Power Station 4500597920 3
07/08/20 3020651 Exelon - Dresden 726302 1
06/01/20 3020719 1
04/01/21 Energy Harbor Corp - Beaver Valley 45656635 1
04/05/21 3021639 1
04/15/21 Tennessee Valley Authority-6879386 10 10/01/21 3022282 Brown's Ferry Table 1: List of Customers for PIN ESl50359
1111 12:42:15p.m.
11-24-2021 6 /6 Report No.
Revision:
Date:
11124/21 Page:
3 of 3 (vii) 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.
For all affected customers:
ES/ recommends a rework of the check valve. Remove the hinge pin retainer plug and ensure plug threads and PTFE washer are free from damage or distortion. Apply Loctite 243 sparingly ta clean plug threads then re-install the plug and PTFE washer, using caution to minimize seepage of thread locker. Using a 10mm socket, torque the plug ta 5 (+/-0.5) in-lbs and allow the Loctite to cure.
Note: For check valves installed on the engine, this activity should be performed with urgency. It is difficult to predict if the plug will loosen but the issue detected by the customer occurred within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of operation. Since inspections of other check valves detected law breakaway torque, this indicates plug loosening to be a likely scenario when the valve is subjected lo engine operating vibrations. As a reminder, the circulating oil pump must be turned off and ail drained from the line prior to performing rework.
For ES/:
The dedication procedure for this check valve is currently undergoing revision to incorporate the rework activity listed above (use of Loctite 243 and 5 in-lb torque). This will eliminate unintended plug loosening from future shipments. This is expected to be complete by December 7, 2021 and in all cases, prior to any future shipments.
(viii) Any advice related to the potential 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.