05000354/LER-1990-009

LER 90-009-00:on 900607,HPCI Sys Oil Samples Indicated High Water Content & Traces of Sediment Contamination.Caused by Design Deficiency in HPCI Turbine Lube Oil Reservoir. Reservoir Cleaned,Flushed & Wiped down.W/900705 Ltr

ML20055D923
Person / Time
Site:	Hope Creek
Issue date:	07/05/1990
From:	Cowles R, Hagan J Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-90-009-02, LER-90-9-2, NUDOCS 9007100154
Download: ML20055D923 (4)

LER-2090-009,

Event date:
Report date:
3542090009R00 - NRC Website

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& ff j . Public Service Electnc and Gas Company P.O. Box 236 Hancockt, Bndge, New Jers ey 08038 Hopo Creek Generating Station ,

Y July 5, 1990 U. 8. Nuclear Regulatory Commission Document Control Denk Washington, DC 20555 ..

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1 Dear Sir HOPE CREEK-GENERATING STATION DOCKET No. 50-354 UNIT NO. 1 LICENSEE EVENT REPORTt 90-009-00 This Licensee Event Report is being submitted pursuant to

.;i the requirements of 10CFR50.73 (a) (2) (v) . ll Sincerely,

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J.J. agan General Manager - Ui Hope Creek Operations RBC/

. Attachment SORC Mtg.90-062 C Distribution s

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9007100154 900705 Nh PDR ADOCK 05000354 R PDC / g

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NAME 1111NNE NtMGR Richard Owleo, Senior Stati thgirner - hdinical 609 3 3 9 1 4 3 1 (IMITIE (NE IJNE RR FA01 GMKNINT IAlllRE N0iTV IN 1HIS RDmt (13)

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On 6/7/90 at 1016, the System Engineer responsible for the liigh Pressure Coolant Injection (llPCI ) systern reported to the Senior Nuclear Shift Supervisor (SNSS, SRO licensed) that !!PCI oil samples indicated high watar content and traces of sedicent contamination. The SNSS declared the IIPCI system inoperable, and a e-rk request was initiated to clean the llPCI turbine lube oil reservoir and change out the llPCI turbine lube oil. The primary cause of the oil contamination is a design deficiency in the HPCI turbine lube oil reservoir that does not allow for complete draining of reservoir during oil changes. The reservoir is not equipped with a drain line at the low point. As such, it is possible for water and sludge to collect at the low point over time due to condensation in the reservoir as llPCI room temperatures change. Corrective actions included cleaning, flushing, and wipe down of the llPCI turbine lube oil reservoir, rosampling the lube oil, and reviewing the llPCI lube oil trending program.

Additionally, prior to this occurrence, Systems Engineering had initiated a design change to install a drain line at the low point in the reservoir to facilitate periodic draining of accumulated water and sludge.

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PhANT AND SYSTEM IDENTIFICATION l

General Electric - Boiling Water Reactor (BWR/4) i High Pressure Coolant Injection System (EIIS Designation: BJ) ,

j IDENTIFICATION OF OCCURRENCE High Pressure Coolant Injection System Declared Inoperable '

Based on Results of 011 Sample Analysis - Design Deficiency in 4

Drain Arrangment of Lube Oil Reservoir Event Date: 6/7/90 Event Time: 1016 This'LER was initiated by Incident Report No.90-062 CONDITIONS PRIOR TO OCCURRENCE Plant in OPERATIONAL CONDITION 1 (Power Operation), Reactor J Power 100%, Unit Load 1100MWo.

DESCRIPTION OF OCCURRENC.E

' Chi 6/7/90 at 1016, the System Engineer responsible for the High Pressure Coolant Injection (HPCI) system reported to the Senior Nuclear Shift Supervisor (SNSS, SRO licensed) that quarterly HPCI oil sample analysis indicated unacceptable levels of moisture content and traces of sediment contamination. The ,

SNSS declared HPCI inoperable at this time. A work order was-initiated to clean the HPCI turbine lube oil reservoir, change the oil, and resample the oil. Additionally, the SNSS  ;

initiated a four hour non-omergency report IAW 10CFR50.72 due to declaring HPCI (a single train safety system) inoperable. ,

Following completion of a system oil changeout and cleaning of .

the HPCI turbine lube oil reservoir, the HPCI eystem was i declared operable on 6/7/90 at 1811.  !

APPARENT CAUSE OF OCCURRENCE i The proximate cause of this incident was moisture and entrained 1 sediment in the quarterly HPCI oil sample. The root cause of the unacceptable oil quality is a design deficiency in the HPCI turbine lube oil reservoir that does not allow for complete draining of the= reservoir during oil changes. The reservoir is  ;

not equipped with a drain at the low point. As such, it is possible for water and sludge to collect at the' low point over-time due- to condensation in the reservoir as HPCI room temperatures change.

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LIONSEE DThT 16:KRT (IIR) HXT ENTINUATIW FACILITV KNE (1) DOILT HlMER (2) ' ilR NLMD (6) _ PAGE (3) iTAR \\ NLMR \\ RD' itXE OGIK GMRATING ITIATIW 0 % 00354 d

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0 0 0 3 T O 3 PREVIOUS OCCURP.ENCES  ;

This is the first occurrence, at Hope Creek, of HPCI being declared inoperable due to unacceptable oil cample results.

4 EhEETY BIGNIFICANCE During the time that HPCI was inoperable, all other Emergency I Core Cooling Systems (Core Spray, Low Pressure' Coolant ,

Injection mode of the Residual Heat Removal System, Automatic' '

Depressurization System), as well as the Reactor Core Isolation Cooling system,' wore operable. Technical Specifications allow continued operation of the reactor for up to 14 days with HPCI inoperable. For this reason, the safety significance of 'tlis incident was minimal, and the safe operation of the plant was not compromised.

CORRECTIVE' ACTIONS .

1. The. HPCI turbine lube oil reservoir was cleaned, inspected, and the oil replaced. l t

2. Samples were drawn of the new lube oil, both from the barrels prior to transfer and after retest run of HPCI.

c? Analysis indicates satisfactory lube oil quality.

3. Prior to this occurrence, Systems Engineering had .

initiated a design change to install a drain line at the low point in the reservoir to facilitate periodic draining of accumulated water and sludge. ,

4. Systems Engineering will conduct a review of the HPCI lube oil analysis trending program to determine if enhancements are needed to, identify adverse oil quality trends prior to oil quality exceeding acceptable limits.

Sinc rely, J lagan Gene al Manager -

Hope Creek Operations SORC Mtg.90-062  ;

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