ML20247G613

Part 21 Rept Re Defect Contained in Automatic Switch Co, Solenoid Valves,Purchased Under Purchase Order (Po) 970161. Caused by Presence of Brass Strands.Replaced Defective Valves

ML20247G613
Person / Time
Site:	Cooper
Issue date:	05/13/1998
From:	Swailes T NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-98 NLS980087, NUDOCS 9805200302
Download: ML20247G613 (4)

Text

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Nebraska Public Power District "T3l=':2""

NLS980087 May 13,1998 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001 Gentlemen:

Subject:

Pan 21- Reporting of Defects in Solenoid Valves Cooper Nuclear Station, NRC Docket 50-298, DPR-46 The following report is submitted pursuant to 10CFR Part 21 requirements: .

On March 18,1998, Cooper Nuclear Station (CNS) determined that the Automatic Switch Company (ASCO) solenoid valves, purchased under Purchase Order (PO) 970161, contained a defect. These valves (Part No. NPL8342B2E) were received by CNS on May 29,1997.

CNS has found brass strands inside the valve bodies of two of the valves. These brass strands have been determined to be the most likely cause for improper operation of the valves.

The subject solenoid valves were manufactured by Automatic Switch Company,50-60 Hanover Road, Florham Park, New Jersey, 07932.

The brass strands were found inside the body of the solenoid valve HV-SOV-(SPV-259) that failed on March 1,1998. This valve, which has since been replaced, is installed in the Reactor Building Ventilation System. The presence of the brass strands was determined to be the most likely cause for this solenoid valve failing in the mid-position. The failure of the HV-SOV-(SPV-259) valve could have prevented the HV-AOV-259AV valve from closing. The brass strands were also found in one spare solenoid valve obtained under the same PO. CNS, however, did not find any brass strands in the spare solenoid valve from a different PO. Therefore, it appears that the failure of these valves might be a batch-related problem.

The potential safety hazard, which could have been created by the presence of the brass strands inside the valve body, following an accident, is a potential release of radiation to the atmosphere in excess of 10CFR100 guidelines. Further, the failure of closing the HV-SOV-(SPV-259) valve due to the presence of the brass strands could create a single failure post accident,if the redundant valve HV-MOV-258MV failed to close.

CNS purchased three valves under PO 970161. One of the valves was installed as HV-SOV-(SPV-259) in the Reactor Building Ventilation System. The other two valves were in the warehouse. 3

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NLS980087 .

May 13,1998 Page 2 '

We have replaced the defective HV-SOV-(SPV-259) valve with a valve from a different batch.

The two defective valves from the warehouse have been removed. All three defective valves have been returned to ASCO. Further, we have discussed with ASCO the defect described in this report.

Sincerely, 1

)AA

+r gY m 1 J. .Swa s Preside NuclearEnergy

/rss Enclosure cc: Regional Administrator USNRC - Region IV Senior Project Manager USNRC -NRR Project Directorate IV-1 Senior ResidentInspector UShTC NPO Distribution 1

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• weiterne av.co w ev4 eso oods w e ' ***+'****w l ATTACHMENT 3 LIST OF NRC COMMITMENTS l

Correspondence No NLS990097 The following table identifies those actions committed to by the District in this docu:nent .

planned actionsAny other actions by the discussed in the submittal represent intsnded or District. They are described to the NRC for the NRC's l information and are not regulatory co.i.mitments. Finase notify the NLES Manager at Cooper Nuclear regulatory Statien of any questions regarding this document er any associated ec=mitments.

COMMITTED DATE COMMITMENT OR OUTAGE None l PROCEDURE NUMBER 0.42 l REVISION NUMBER 6 l .._ PAGE 9 OF 13 l

a POWER REACTOR EVENT NUMBER: 34233

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FACILITY: 000PER REGION: 4 NOTIFICATION DATE: 05/14/98 UNIT: [1] [ ] [] STATE: NE RX TYPE: [1] GE-4 NOTIFICATION TIME: 15:02 [ET]

EVENT DATE: 03/18/98 EVENT TIME: 00:00[CDT]

NRC NOTIFIED BY: CHRIS MOELLER/ GARY STOCK LAST UPDATE DATE: 05/14/98 HQ OPS OFFICER: LEIGH TROCINE NOTIFICATIONS EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION: TOM STETKA RDO CCCC 21.21 UNSPECIFIED PARAGRAPH VERN HODGE NRR UNIT SCRAM CODE RX CRIT INIT PWR INIT RX MODE CURR PWR CURR RX MODE 1 N Y 100 POWER OPERATION 100 POWER OPERATION EVENT TEXT 10 CFR PART 21 NOTIFICATION - DEFECTS IN ASCO SOLENOID VALVES ON MARCH 18, 1998, COOPER NUCLEAR STATION (CNS) DETERMINED THAT THE AUTOMATIC SWITCH COMPANY (ASCO) SOLENOID VALVES, PURCHASED UNDER PURCHASE ORDER (PO) 970161, CONTAINED A DEFECT.

THESE VALVES (PART NO. NPL8342B2E)

WERE RECEIVED BY CNS ON MAY 29, 1997. CNS FOUND BRASS STRANDS INSIDE THE VALVE BODIES OF TWO OF THE VALVES. THESE BRASS STRANDS HAVE BEEN FOUND TO BE THE MOST LIKELY CAUSE FOR IMPROPER OPERATION OF THE VALVES. THESE VALVES WERE MANUFACTURED BY ASCO, 50-60 HANOVER ROAD, FLORHAM PARK, NEW JERSEY, 07932.

CNS PURCHASED THREE VALVES UNDER PO 970161. ONE OF THESE VALVES WAS INSTALLED AS HV-SOV- (SPV-259) IN THE REACTOR BUILDING VENTILATION SYSTEM.

THIS VALVE FAILED ON MARCH 1, 1998, AND IT HAS SINCE BEEN REPLACED. BRASS STRANDS WERE FOUND INSIDE THIS VALVE. THE OTHER TWO VALVES WERE IN THE WAREHOUSE.

BRASS STRANDS ALSO WERE FOUND IN ONE OF THESE TWO VALVES. CNS, HOWEVER, DID NOT FIND ANY BRASS STRANDS IN A SPARE VALVE FROM ANOTHER PO.

ALL THREE VALVES FROM PO 970161 HAVE BEEN RETURNED TO ASCO.

THE LICENSEE PLANS TO NOTIFY THE NRC RESIDENT INSPECTOR. (REFER TO THE HOO LOG FOR A SITE CONTACT TELEPHONE NUMBER.)

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