PNO-III-86-104, on 860923,unit Shutdown at 4:08 Am,To Investigate Cause of High Bearing Temp on One of Recirculation Pumps.Vendor Insp Determined That Some Cells, Which Supply Control Power to Hpic Sys Valves Be Degraded

PNO-III-86-104:on 860923,unit Shutdown at 4:08 Am,To Investigate Cause of High Bearing Temp on One of Recirculation Pumps.Vendor Insp Determined That Some Cells, Which Supply Control Power to Hpic Sys Valves Be Degraded

ML20212E682
Person / Time
Site:	Duane Arnold
Issue date:	09/23/1986
From:	Boyd D, Guldemond W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-86-104, NUDOCS 9711040021
Download: ML20212E682 (1)

e p;

- PRELIMINARY NOTIFICATION OF EVENT-OR UNUSUAL OCCURRENCEePNO-!!!-86404 Date'Septemb6 23,1

• This preliminary notification constitutes EARLY notice of events of-POSSIBLE safety The information is as initially received without verification _or evaluation, and is basically all that-is- known by. the Region !!!-

y [ Nystaffonthisdate.-

a or public' interest _significancei _

Facility:; Iowa Electric Light:& Power Co.H Licensee Emergency Classification:-

Duane Arnold Energy Center. Notification of.an Unusual Event

=Palo,-I C 52324 Alert Site Area Emergency Docket No. 50-331- General Emergency T Not Applicable

Subject:

-SHUTDOWNFORRECIRCl4ATIONPUMPBEARINGPROBLEM- ,

Theunitwasshutdownat4:08a.m._(CDT), September 23, 1986, to investigate the cause of high bearing temperatures on one of the recirculation pumps. During the shutdown, other maintenance will be performed including replacement of a recirculation valve in the High

. Pressure Coolant Injection-(HPCI) System and the evaluation and possible replacement of -

12 cells in the 250-volt battery bank. A vendor inspection determined some cells, which supply control power to HPIC System valves, to be degraded and the-HPCI system was

' declared-inoperable. Other Emergency Core Cooling Systems were operable, and the HPCI-

problem therefore did not require shutdown. -

The outage is expected to last longer than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

The State of Iowa will-be notified.

Region !!!-(Chicago) was informed that the' unit was shutting down at 4 p.m. (CDT),

September 22, 1986, and additional information was provided by the Resident' Inspector._ This .

'> information is current as of 11 a.m.,_ September 23, 1986.

k CONTACT: D. C. Boyd W. G. Guldemond-FTS 388-5546 FTS 388-5574 C/R Distribution: Chm, Cmrs,

.. S,GC,CA,ACRS. Historian, yy v ')

SECY, Records.

C

'OISTRIBUTION: SP: O W P2 d3S N' H. St. ,

EDO _NRR E/W " Willste Mail: ADM:DMB Chairman Zech PAL IE . NMSS u DOT:Trans only Conn. Roberts ELD OIA RES 30 Comm. Asselstine AE00 Conni. Bernthal

- Conn. Carr 5P~ Regional-Offices

-ACRSc ~

-SECY. INP01 MSAC R. _ ne: (Corp. Office.-R9actorLic.Only) -

,9 '

\' Region III

, .Rev. November 1985

~

(M d_2 D -

9711040021 6 NO-I 96-104 PDR _ , _

i_

=

. _ _ - _ _ - _ _ _ _ _ _ m