ML20214V057

Final Significant Deficiency Rept 87-07 Re High Head Safety Injection/ Charging Pump Operating Below Min Operating Curve.Initially Reported on 870323.Pump Rotating Assembly Replaced W/Spare Rotating Assembly & Satisfactorily Tested

ML20214V057
Person / Time
Site:	Beaver Valley
Issue date:	05/21/1987
From:	Carey J DUQUESNE LIGHT CO.
To:	Russell W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
2NRC-7-136, 87-07, 87-7, NUDOCS 8706110429
Download: ML20214V057 (3)

Text

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~fdbT 2NRC-7-136 (412)393-7546 Beaver Valley No. 2 Unit Project Organization Telecopy (412) 393-7889 QGBu no May 21, 1987 Shippingport, PA 15077 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION: Mr. William T. Russell Administrator

SUBJECT:

Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 High Head Safety Injection / Charging Pump 2CHS*P21C Operating Below Minimum Operating Curve Potential Significant Deficiency Report 87-07, Final Report Gentlemen:

This Potentially Reportable Significant Deficiency Report is being submitted pursuant to the requirements of 10CFR50.55(e). It is anticipated that no additional reports will be required.

DUQUESNE LIGHT COMPANY By i J. J. Carey /)

Sr. Vice PresideaV LMR/ijr NRC/LMR/SDR/8707 Att nt AR cc: Mr. P. Tam, Project Manager (w/a)

Mr. J. M. Taylor, Director (3) (w/a)

Mr. J. Beall, Sr. Resident Inspector (w/a)

Mr. L. Prividy, NRC Resident Inspector (w/a)

INP0 Records Center (w/a)

NRC Document Control Desk (w/a) 8706110429 870521 2 l PDR ADOCK 0500 s

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1. Summary-During the performance of Preoperational Test P0-2.11A.03, "SI Full Flow Test," it was noted that at runout condition the High Head Safety Injec-tion (HHSI)/ Charging Pump 2CHS*P21C was operating below the defined mini-mum operating curve.

2. Immediate Action Taken The test was run a second time to confirm the data taken; similar results were received. Westinghouse reviewed the data and a third test was run to take a full spectrum of data points to aid further evaluation. The results obtained were again below the minimum operating curve at runout conditions.

Mr. L. M. Rabenau, Lead Compliance Engineer, Beaver Valley Power Station Unit -No. 2, contacted Mr. Lowell Tripp, EC Region I, of this concern on March'23, 1987. An interim ' aport, 2NRC-7-090, dated April 22, 1987 was transmitted to NRC Region I.

3. Description of Deficiency The data points obtained during the third run of the test were plotted on the minimum operating curve. At the runout point, the HHSI/ Charging Pump 2CHS*P21C total -developed head (TDH) falls below the minimum operating point.

4. Analysis of Safety Implication The inability of HHSI/ Charging Pump 2CHS*P21C to meet the minimum operat-ing criteria invalidates the FSAR Loss of Coolant Accident Analysis and .

disqualifies it from being considered operable for the Technical Specifi-cations Limiting Conditions for Operations.

5. Corrective Action to Resolve the Deficiency The 2CHS*P21C pump rotating assembly has been replaced with the spare rotating assembly and has been tested satisfactorily. The original rotat-ing assembly was shipped to Pacific Pump for further factory testing.

Based on the factory retest results and inspection of the HHSI/ Charging pump rotating assembly, it appears that the decrease in 2CHS*P21C output can be attributed to two things. The first is due to wear ring clearances. Five clearances measurements were noted to be greater than the acceptable range.

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The second is the difference in measurement instrumentation and location.

The field test data was obtained using a differential pressure (DP) cell and a test pressure gauge at a flow transmitter penetration. The test results indicated an approximate 30% decrease in output from the initial f actory test. When the pump internals were retested at the factory, the results obtained indicated a decrease of only approximately 5.6% from the initial factory test.

6. Additi_onal Report No Additional Reports are expected.

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