PNO-III-89-037, on 890601,recirculation Pump B Seals Failed After Pump Shifted to Fast Speed During Plant Increase in Power Following First Refueling Outage.Recirculation Loop Isolated & Plant Shutdown Initiated.Special Insp Planned

PNO-III-89-037:on 890601,recirculation Pump B Seals Failed After Pump Shifted to Fast Speed During Plant Increase in Power Following First Refueling Outage.Recirculation Loop Isolated & Plant Shutdown Initiated.Special Insp Planned

ML20247P227
Person / Time
Site:	Clinton
Issue date:	06/01/1989
From:	Knop R, Ring M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-89-037, PNO-III-89-37, NUDOCS 8906060128
Download: ML20247P227 (1)

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PRELI Y NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PN0-III-89-37 Date June 1, 1989

.s.

he.h This prel nary notification constitutes EARLY notice of events of POSSIBLE saf:ty or public interest significance. The information is as initially rec;iv:d without verification or evaluation, cnd is basically all that is known by the Region III staff on this date.

Facility: Illinois Power Company Licensee Emergency Clinton Classification:

Clinton, IL 61727 Unusual Event X Alert Docket No. 50-461 Site Area Emergency General Emergency Not Applicable

Subject:

RECIRCULATION PUMP SEAL FAILURE At about 12:45 amm. (CDT) on June 1, 1989, both seals on the 'B' recirculation pump failed aft:r the pump was shifted to its fast speed as the plant was increasing power following its first refueling outage.

Maximum leakage past the seals was about 63 gallons per minute. The leaking water was collected in the drywell floor drain, and there was no release of radioactivity to the environment. Reactor water level was maintained using the normal feedwater system, and the cmerg:ncy core cooling system was not required.

Licensee operators isolated the 'B' recirculation loop, and commenced an orderly plant shutdown. With the loop isolated, leakage decreased to about 2 gallons per minute.

Th3 licensee initially declared an unusual event under its emergency plan at 12:55 a.m. and upgrad:d the classification to an alert at 1 a.m. when the drywell floor drain flow exceeded 50 gallons per minute. After the recirculation loop was isolated, the classification was  ;

r turned to an unusual event at 1:40 a.m. That classification was terminated at 3:25 a.m.

At 6:10 a.m. the reactor was manually scrammed from 3 percent power when the motor driven fcedwater pump regulating valve did not properly respond to control signals.

The resident. inspectors responded to the plant following the incident, and monitored the shutdown from the control room. A special inspection will be conducted using region-based and headquarters specialists to review the circumstances of the seal failures and the licens:e's response to the incident.

This information is current as of 10:00 a.m. (CDT).

The State of Illinois will be notified.

CONTACT:

W(RingM M.

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R. Knop FTS 388-5602 FTS 388-5547 DISTRIBUTION:

WHITE FLINT NORTH 1 MNBB REGIONS FAX T0:

Chairman Zech CA- ARID RI INPO //co?

Comm. Roberts OGC ARM RII NSAC//. m i Comm. Carr OI OIA RIV Licensee))j/f l Comm. Rogers EDO RV NRC Ops Ctr //. / F Comm. Curtiss NRR NL MAIL T0: PDR (8/634-3343) //.'/8 t SECY NMSS RES FC3 (orig.) I

! GPA/SLITP/PA ACRS DOT (Trans. Only) 0 i ASLAP

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s906060128 890601 Rev. 03/01/89 -

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M-Ikh89_o37 PDC _________________a