ML20004D513

LER 81-006/03L-0:on 810507,charging Pump 121 Drive Unit Failed.Caused by Bearing Failure in Varidrive Unit.Damaged Parts Replaced

ML20004D513
Person / Time
Site:	Prairie Island
Issue date:	06/05/1981
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20004D506	List: ML20004D505 ML20004D513
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8106090483
Download: ML20004D513 (1)

Text

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t/ LICENSEE EVENT REPORT CONTROL BLOCK: l 1

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74 7b REPORT DAT E 80 l a 60 R EVENT DESCRIPTION AND PROBABLE CONSEOUENCES h l0l2l l While No. 22 Charging Pump was out for maintenance the No. 121 Charging Pump i gg drive unit failed, making No. 21 pump inoperable. No. 23 Charging Pump remained [

io,,,; operable. No effect on public health or safety. 'In the safety analysis no credit l o o I is taken for charging pumps. Tech Spec 3.2.B.1 applies. Recent similar event l gl was a0 80-17.  ;

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1J 44 #7 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS

[TTTII Failure of a bearine in a its r1.rer4 rni un e n .-. varidrive unit. Damngort narra l Qg! vere replaced and the second chargine pump was made onernble in le== rhan I 4

gl 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. I I

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1 4 l 80 7 8 9 ST A 5  % POWER OTHE R ST ATUS Dis O RY DISCOVERY DtSCRIP1lON

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7 8 9 NRc use oNoy ISSUE DE SCRIPTIG.. @ 810 600 0 4 g3 uj,,0.J - LN_jhl NA l lllllllllllll2 6F 69 80 5 7 8 9 to

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NAME OF PREPARER PHONE: