ML20076C001

Ro:On 830803,while Performing Periodic Surveillance Testing on RCIC Sys,Discharge Pressure Instrument PI 2506 Displayed Erroneous Indications.Hpci Turbine Speed Indication Failed Downscale During Testing

ML20076C001
Person / Time
Site:	Duane Arnold
Issue date:	08/03/1983
From:	Mineck D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
DAEC-83-634, NUDOCS 8308220137
Download: ML20076C001 (1)

Text

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Iowa Electric Light and Ibwer Company August 3, 1983 DAEC 634 Mr. James G. Keppler Regional Administrator '

Region III U. S. Nuclear Regulatory Commission. '

799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Duane Arnold Energy Center Op. License No. DPR-49 Docket No. 50-331 Prompt Notification of a Reportable Occurrence File: A-118a .

Dear Mr. Keppler:

This ' letter telecopied to your office, provid.es written confirmation of a prompt notification pursuant to DAEC Technical Spacifications, Appendix A, Section 6.11.2.a.7. ~

On the morning of 8/3/83,'at approximately 0317 while performing. periodic surveillance testing on the RCIC System, discharge pressur,e instrument-PI 2506 displayed erroneous indications. Although this instrument.provides no automatic control functio _n, its failure prevents confirming RCIC discharge ~ pressure and flow as required in our surveillance procedure. The RCIC System, therefore,,

was declared inoperable. In accordance with DAEC technical spacifications,

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Appendix A, surveillance testing of the HPCI and other. systems commenced.

At approximately 0417 hours0.00483 days <br />0.116 hours <br />6.894841e-4 weeks <br />1.586685e-4 months <br />, HPCI turbine speed indication failed downscale.

Although this instrument also performs no automatic' control function, HPCI was declared inoperable. _

Pursuant to technical specification 6.11.2.a and 10 CFR 50.72, notifications were made to the NRC and an unus'eal event declared: 'An orderly shutdown was ,

initiated in accordance with Technical Specification 3.5.D.3.

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Very truly yours, 8308220137 830803 PDR ADOCK 05000331 S

Daniel L. Mineck PDR Plant Superintendent - Nuclear Duane Arnold Energy Cer.ter -

DLM/WJM/pf .

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