ML24018A014

Engine Systems, Inc., Report No. 10CFR21-0137, Rev. 1, 56913-EN 56913

ML24018A014
Person / Time
Site:	Sequoyah
Issue date:	01/17/2024
From:	Darrell Roberts Engine Systems
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
10CFR21-0137, Rev 1
Download: ML24018A014 (1)

Text

1111 03:32:47 p.m. 01-17-2024 1 /6

ENGINE SYSTEMS, INC.

175 Freight Road Telephone: 252/977-2720 Rocky Mount, NC 27804 Fax: 2521446-1134

TELEFAX

Date: January 17, 2024

Company: NRC Operations Center

Fax Number: 301/816-5151

Verification No.: 301/816-5100

Reference:

Report No. 10CFR21-0137, Rev. 1

From: Dan Roberts

Page: 1 of 6

Dear Sir/ Madam:

Following this cover is a copy of our report 10CFR21-0137, Rev. 1, for a 1 0CFR21 reportable notification for an EMD cylinder liner with bore deficiency, P/N 9318833 (component of power assembly P/N 40124897),

S/N 20M0938. Revision 1 of this report is being issued to correct the date in section (v) from 2024 to 2023.

A copy of the revised report will be mailed to the NRC Document Control Desk and to our affected nuclear customer.

Should you have questions, please let us know.

Sincerely,

ENGINE SYSTEMS, INC.

a_ ~

Dan Roberts Quality Manager

/sjw

Quality Performance With Pride 1111 03:33:04 p.m. 01-17-2024 2 /6

ENGINE SYSTEMS, INC.

175 Freight Road, Rocky Mount. NC 27804 Telephone: 252/977-2720 Fax: 252/446-1134

Report No. 1 0CFR21-0137 Rev. O: 01/04/24 Rev. 1: 01/17/24

10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE

COMPONENT: EMD Cylinder Liner with Bore Deficiency P/N 9318833 (component of power assembly P/N 40124897)

S/N 20M0938

SYSTEM: Emergency Diesel Generator

CONCLUSION: Reportable in Accordance With 10CFR21

Prepared By: ~~ Date: 1 l.11/zr ngineering Manager

Reviewed By: 12~ 0/4;- Date: I /17/2.~

Quality Manager I

Quality Performance With Pride 1111 03:33:17p.m. 01-17-2024 3 /6

Report No. 10CFR21-0137

Record of Revisions Page: 1 of 1

REV DATE PAGE DESCRIPTION

1 01/17/24 1 Corrected date in section (v), changed 2024 to 2023.

1111 03:33:25 p.m. 01-17-2024 4/6

Report No. 10CFR21-0137 Revision: 1 Date: 01117124 Page: 1 of 3

Pursuant to 10 CFR 21.21!dll4l, 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.

EMO Cylinder Liner, PIN 9318833, SIN 20M0938 Component of Fork Power Pack Assembly, PIN 40124897, SIN 23H1306

(iii) Identification of the firm supplying the basic component which fails lo 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 of failure lo comply.

An edge or lip in the bore of an EMO cylinder liner prevented successful installation of the corresponding power assembly on an emergency diesel generator set. The lip is located axially at the bottom of the inlet ports and is present around the circumference of the bore. See photos of the power assembly, liner, and air inlet ports on page 3. The EMO model 645E4 is a 2-stroke engine with air inlet ports in the wall of the cylinder liner. As the piston travels below the inlet ports, air box pressure scavenges and replenishes air to the power assembly.

Installation of the power assembly requires lowering the piston through the liner in order to secure the connecting rod to the crankshaft. During this process the piston could not be lowered below the inlet ports due to the piston rings catching on the lip. The power assembly was not installed and therefore there was no safety hazard; however, if the defect had gone undetected there was the potential to damage engine components and possibly reduce load carrying capacity of the engine.

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

November 27, 2023

(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.

The extent of condition is this single cylinder liner, PIN 9318833, SIN 20M0938 used in the power assembly shown below.

Customer Customer ES/ Sales Part Number Serial PO' Order Ordered Date Number ES/C-of-C

Tennessee Valley Authority-7332773 3023002 40124897 23H1306 10/4/2023 Sequoyah Nuclear Plant (Fork Power Pack) 1111 03:33:53 p.m. 01-17-2024 5/6

Report No. 1DCFR21-0137 Revision: 1 Date: 01/17/24 Page: 2 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 TVA-Sequoyah:

No action required; the power assembly has been returned to ES/.

For ES/:

To prevent reoccurrence, ES/ has revised the dedication package to include verification that bore machining is continuous along the entire length and no edges or lips are present. The revision was implemented on December 6, 2023.

(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.

See photos on page 3 showing location of the lip in the bore.

1111 03:34:05 p.m. 01-17-2024 6 /6

Report No. 10CFR21-0137 Revision: 1 Date: 01/17/24 Page: 3 of3

Air Inlet Ports

I

Location of Lip in Liner Bore at Bottom of Inlet Ports