ML12038A029

Part 21 Report- Foreign Material Found in Emergency Diesel Generator High Pressure Fuel Hose

ML12038A029
Person / Time
Site:	Cooper
Issue date:	02/03/2012
From:	Horner T Engine Systems
To:	Office of Nuclear Reactor Regulation
References
47635
Download: ML12038A029 (7)

Text

0210312012 U.S. NuclearRegulatory Commission OperationsCenter Event Report Pake I Part 21 (PAR) Event# 47635 Rep Org: ENGINE SYSTEMS, INC Notification Date I Time: 02/03/2012 15:35 (EST)

Supplier: ENGINE SYSTEMS, INC Event Date / Time: 12/01/2011 (EST)

Last Modification: 02/03/2012 Region: 1 Docket #:

City: ROCKY MOUNT Agreement State: Yes County: License #:

State: NC NRC Notified by: TOM HORNER Notifications: JONATHAN BARTLEY R2DO HQ Ops Officer: DONALD NORWOOD JEFF CLARK R4DO Emergency Class: NON EMERGENCY PART 21 GRP by Email 10 CFR Section:

21.21 UNSPECIFIED PARAGRAPH PART 21 REPORT - FOREIGN MATERIAL FOUND IN EMERGENCY DIESEL GENERATOR HIGH PRESSURE FUEL HOSE Cooper Nuclear Station (CNS) returned one high pressure fuel hose to Engine Systems, Inc. (ESI) because CNS had found foreign material within the hose during receipt inspection. This fuel hose was one of four fuel hoses that had been supplied to CNS by ESI in October 2011. ESI performed an evaluation and found very small pieces of the elastomer tube internal to the hose. Apparently these pieces were introduced during assembly of the end fittings onto the hose during fabrication of the hose assembly.

When installed, this fuel hose would be located after the engine fuel filter and before the fuel injection pumps.

Foreign material within this hose could migrate to the fuel injection pumps. The entrance of foreign material could impact operability of one or more fuel injection pumps and therefore affect fuel delivery to one or more engine cylinders. This could impact the load carrying capability of the diesel engine or possibly cause complete engine shutdown. Either scenario has the potential to prevent the emergency diesel generator from performing its safety related function.

These hoses were supplied only to CNS.

02-03-12;03:43PM; # 11/ 6 ENGINE SYSTEMS, INC.

175 Freight Road Telephone: 262/977-2720 Rocky Mount, NC 27804 Fax: 252/446-1134 TELEFAX Date: February 3, 2012 Company: NRC Operations Center Fax Number: 301/816-5151 Verification No.: 301/816-5100

Reference:

Report No. 10CFR21-0104, Rev. 0 From: Tom Homer Page: 1 of 6

Dear Sir:

Following this cover is a copy of our report 10CFR21-0104, Rev.0, for a 10CFR21 reportable notification on a fuel hose for Nebraska Public Power District - Cooper Nuclear Station, P/N 2-01 H-050-003.

A copy of this 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.

Tom Homer Quality Assurance Manager Quality Performance With Pride

02-03-12;03:43PM; # 2/ 6 6Ei ENGINE SYSTEMS, INC.

175 Freight Road, Rocky Mount, NC 27804 Telephone: 252/977-2720 Fax: 252/446-1134 Report No. 10CFR21-0104 Rev. 0: 02/02/12 10CFR21 REPORTING OF DEFECTS AND NON-COMPLIANCE COMPONENT: NPPD fuel hose 2-01 H-050-003 SYSTEM: Emergency Diesel Generator CONCLUSION: Reportable in Accordance With 10CFR21 Prepared By:. Date:_______

C Engineering Manager Reviewed By: Date: g,-,

Quality Assurance Manager Quality Performance With Pride

02-03-12;03:43PM; # 3/ 6 Report No. , 10CFR21-0104 Record of Revisions Page: 1 of 1 REVI DATE PAGE DESCRIPTION 0 02/02/12 Initial issue.

I. J

02-03-12;03:43PM; # 4/6 Report No. IOCFR21-0104 Revision: 0 Date: 02/02/12 Page: 1 of 3 COMPONENT:

Fuel hose for Nebraska Public Power District - Cooper Nuclear Station, P/N 2-01 H-050-003.

SUMMARY

Engine Systems Inc. (ESI) began a 10CFR21 evaluation on 12/01/11 upon review of a hose returned by Nebraska Public Power District (NPPD), Cooper Nuclear Station. NPPD returned one (1) high pressure fuel hose, P/N 2-01H-050-003 because they found foreign material within the hose during their receipt inspection process. This was one (1) of four (4) P/N 2-01H-050-003 hoses supplied by ESI on sales order 3008266. The evaluation was concluded on 01/30/12 and determined the occurrence of foreign material in the fuel hose to be a reportable defect as defined by 10CFR21.

The foreign material found during inspection of the returned hose assembly was determined to be very small pieces of the elastomer tube internal to the hose. It appears these pieces were introduced during assembly of the end fittings onto the hose during fabrication of the hose assembly.

The hose, P/N 2-01H-050-003, is located after the engine fuel filter and before the fuel injection pumps. Foreign material within this hose could migrate to the fuel injection pumps. The entrance of foreign material could impact operability of one or more fuel injection pumps and therefore affect fuel delivery to one or more engine cylinders. This could impact the load carrying capability of the diesel engine or possibly complete engine shutdown. Either scenario has the potential to prevent the emergency diesel generator from performing its safety related function.

DISCUSSION:

This hose is used in the fuel oil supply piping on the KSV diesel engine; it is located in the piping between the engine fuel filter and the fuel injector pumps (see Figure 1 and 2) and is unique to the NPPD-Cooper Station engines.

-- 29.75" NOMINAL LENGTH -

DRY' SEAL--- Al"EROQIUIP HOSE PIPE. THU.

FIGURE 1 FUEL HOSE #2-01 H-050-003

02-03-12;03:43PM; # 5/ 6 Report No. 10CFR21-0104 Revision: 0 Date: 02/02/12 Page: 2 of 3 Fuel filters LOCATIFONSUOE OIL 2-l50 0"

CYL* -4 ,,,,* _43'__.NC,

//c 01 DRA /

Fulinjector pum s"-- - ,--.

FIGURE 2 LOCATIONS OF FUEL HOSE #2-01H-050-003

02-03-12; 03:43PM; # 6/

Report No. 10FR21-0104 Revision: 0 Date: 02/02/12 Page: 3 of a AFFECTED USERS AND SHIPMENTS:

Previous shipments of the hose, part number 2-01 H-050-003, are identified below.

Affected shipments Part Number Customer ESI S.O. Cust. P.O. .... Wt Ship Date 2-01H-050-003 NPPD-Cooper 3008266 4500132314 4* Oct. 2011 2-01H-050-003 NPPD-Cooper 3007377 4500121165 1 Feb.2011 2-01 H-050-003 NPPD-Cooper 112509 4500034077 3 Oct. 2003

• one of these returned for this evaluation CORRECTIVE ACTIONS:

Hoses remaining in customer inventory should be inspected to verify they are free of foreign material prior to installation. Any hoses previously installed on the EDG are not suspect as operability has been confirmed via functional testing.

To prevent recurrence of this issue, the dedication report for the hose assembly has been revised to include a requirement to solvent flush each hose prior to shipment. Filtered solvent will be pumped through the hose for a minimum of 5 minutes. After flushing, nitrogen will be blown through the hose to remove excess flushing fluid and a detailed visual inspection will be performed to ensure there are no visible contaminants immediately prior to installation of the hose end caps. This flushing requirement was already included in the dedication reports for other critical application hose assemblies so this notification is being limited to this part number only.