ML20041B412

LER 82-003/03L-0:on 820120,in Mode 3,svc Water Flow Through B LPCI Pump Seal cooler,2E-52B,found Lower than Required by Svc Water Flow Balance.Caused by Asiatic Clams Lodged in Supply Tubing to Cooler.Tubing & Cooler 2E-52B Cleaned

ML20041B412
Person / Time
Site:	Arkansas Nuclear
Issue date:	02/10/1982
From:	Rogers P ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20041B408	List: ML20041B407 ML20041B412
References
LER-82-003-03L, LER-82-3-3L, NUDOCS 8202230617
Download: ML20041B412 (2)

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NRC FORM 364 U S. NUCLE AR REGULATORY COMMfS$40N (7 77)

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7% HE,OH T D Af f 40 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES g ITTT1 L0n 1/20/82 while in Mode 34 the service water flow through the 'B' Low i o 2 1 Pressure Safety Injection (LPSI) Pump Seal Cooler, 2E-52B, was found to bq o . I lower than required by the service water flow balance. This was assessed i Lal5J I to out the 'B' LPSI Pump, 2P-60B, in a degraded mode of operation. 'A' i ro 3 i i LPSI Pump, 2P-60A, was operable. This occurrence is reportable per ,

o i l T.S.6.9.1.9.b and is similar to LER 50-368/80-072. I o a l I

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36 JJ 40 41 ed 43 44 es CAUSE DESCR4PTION AND CORREC OVE ACTIONS 27 i o I A very small number of asiatic clam shells had lodged in the supply tub i g i ng to i the cooler and obstructed flow through the cooler. The supply ,

i i tubina was removed cleaned and insoected. Also the cooler, 2E-52B, was i 3 i cleaned and inspected. The components were reassembled and acceptable ,

i e I flow rate was attained. This occurrence was discovered at 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> i

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e- *: ' ATTACHMENT-LER No. 50-368/82-003/03L-0 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (cont'd) on 1/20/82, and corrective action was completed at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> on 1/20/82.

Therefore, action a. of T.S.3.5.2 which requires the system to be operable within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> was met. Flow rates for similar components were found to be acceptable. Use of in-line basket strainers is being evaluated.

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