05000331/LER-1983-027, /01T-0:on 830803,during Surveillance Required by Inoperable RCIC (LER 83-027),speed Indication for HPCI Turbine Failed.Caused by Faulty Turbine Magnetic Speed Pickup.Turbine Oil Sys Adjusted

/01T-0:on 830803,during Surveillance Required by Inoperable RCIC (LER 83-027),speed Indication for HPCI Turbine Failed.Caused by Faulty Turbine Magnetic Speed Pickup.Turbine Oil Sys Adjusted

ML20076F636
Person / Time
Site:	Duane Arnold
Issue date:	08/17/1983
From:	Kibler D, Mineck D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
DAEC-83-674, LER-83-028-01T, LER-83-28-1T, NUDOCS 8308260107
Download: ML20076F636 (3)

LER-2083-027, /01T-0:on 830803,during Surveillance Required by Inoperable RCIC (LER 83-027),speed Indication for HPCI Turbine Failed.Caused by Faulty Turbine Magnetic Speed Pickup.Turbine Oil Sys Adjusted

Event date:
Report date:
3312083027R00 - NRC Website

text

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$ ,.. n i rable RCIC (See LER 83-0'27), it was found that the. speed indication for- I gi the HPCI turbine had failed. The testing of HPCI could not be completed 1 3 a ,,i i due to this problem. HPCI was declared inoperable and a shutdown wds ini ' _ l gi tiated in accordance with T.S. 3.5.E.3. Later on 8/3, PCIC was repaired I io ,7 l l and returned to service. The shutdown was terminated and a 7 day LC0 ant I m l ered IAW T.S. 3.5.D.2. No effect on health and safety of oublic. **

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, DUANE ARNOLD ENERGY CEHTER Iowa Electric Light! and Power Company

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Licensee Event Report - Supplemental Data x -

Docket No. 050-0331

. s L l.icensee Event Report Date: 8-17-83 l p2portableOccurrenceNo.: 83-028 Event Description and' Probable Consequences During normal operation, while conducting surveillance required by T.S. 4.5.E.2 for inoperable RCIC (see LER 83-027), it was found that the speed indication for the HPCI turbine had failed. The testing of HPCI could not be completed due to this problem. HPCI was declared inoperable and a shutdown was initiated in accordance with T.S. 3.5.E.3. Later on 8/3, RCIC was repaired and returned to service. The shutdown was terminated and a 7 day LC0 entered in accordance y'.with T.S. 3.5.D.2. ADS, CS and LPCI were operable throughout the HPCI and RCIC inoperable problems. No effect on health and safety of public.

Cause Description and Corrective Action

'The tirbine magnetic speed pickup was found to be faulty. The pickup was replaced.

When tie turbine was tested following the replacement of the speed pickup, speed contrd! was unstable. The turbine oil system was adjusted and the turbine retested.

Furthe'r adjustments were made to the turbine suction pressure indication and the tujbine speed circuits and the system tested satisfactorily. The 7-day LC0 was ended,on 3/6. Repetitive failures of HPCI during 1983 have been evaluated.

The evaluation determined failures to be non-related.

1-4 ,

Page 1 of I

w y-lowa Electric Light and Ibwer Company August 17, 1983 DAEC-83-674 Mr. Janes G. Keppler Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Duane Arnold Energy Center Docket No. 50-331 Op. License DPR-49 Licensee Event Report No.83-028 (14-day)

Dear Mr. Keppler:

In accordance with Appendix A to Operating License DPR-49, Technical Specifications, Section 6.11.2.a(7), and dases for Duane Arnold Energy Center and Regulatory Guide 10.1, please find attached a copy of the subject Licensee Event Report.

Very truly yours, Daniel L. Mineck P1 ant Superintendent - Nuclear Duane Arnold Energy Center DLM/ DRK/pf l attachment cc: Document Control Desk U. S. Nuclear Regulatory Commission Washington, D. C. 20555 NRC Resident Inspector - DAEC File A-118a g)G a 9 Y

t

/y a Duane Arnold Energy Center. P.O. Box 351. Cedar Flapids, Iowa 52406 319!8517611

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