05000302/LER-1982-070, Forwards LER 82-070/03L-0.Detailed Event Analysis Encl

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Forwards LER 82-070/03L-0.Detailed Event Analysis Encl
ML20070D562
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 12/07/1982
From: Westafer G
FLORIDA POWER CORP.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20070D565 List:
References
3F-1282-03, 3F-1282-3, NUDOCS 8212150099
Download: ML20070D562 (2)


LER-2082-070, Forwards LER 82-070/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3022082070R00 - NRC Website

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December 7,1982

  1. 3F-1282-03 File: 3-0-3-a-1 Mr. James P. O'Reilly l Regional Administrator, Region II U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement 101 Marietta Street N.W., Suite 3100 Atlanta, Ga. 30303

Subject:

Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Licensee Event Report No.82-070

Dear Mr. O'Reilly:

Enclosed please find Licensee Event Report No.82-070 and the attached supplementary information sheet, which are submitted in accordance with Technical Specification 6.9.1.9.b.

Very truly yours,

/

G. R. Westafer Manager Nuclearing Licensing and Fuel Management PGH/ mig Enclosure cc: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555 @'

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8212150099 821207 (f'k PDR ADOCK 05000302 S PDR General Office 3201 Tn rty-sourin sir t soutn . P.O Box 14042. st. Petersburg. Florida 33733 e 813-866-5151

. . .~. _ __ _ -__

SUPPLEMENTARY INFORMATION

REPORT NO
50-302/82-070/03L-0 FACILITY: Crystal River Unit #3 REPORT DATE: December 7,1982 OCCURRENCE DATE: November 7,1982 IDENTIFICATION OF OCCURRENCE:

Channel "B" of the Nuclear Overpower Instrumentation, a Reactor Protection System, was inoperable. Technical Specification 3.3.1.1. requires initiation of Action Statement Two with one of the four Nuclear Overpower Channels inoperable.

CONDITIONS PRIOR TO OCCURRENCE:

i MODE 1 (69% Full Power).

DESCRIPTION OF OCCURRENCE:

At 0734 on November 7,1982, Reactor Coolant Flow Transmitter (RC-14A-FT2) failed.

Failure of the transmitter caused Channel"B" of the Nuclear Overpower Instrumentation to be inoperable. Channel "B" was verified in the tripped condition. The minimum channels i operable requirement was met; Channels A, C, and D were available. The Quadrant Power Tilt l

was monitored ever-* 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. Both transmitters in Channel "B" were recalibrated. During calibration operations, the companion flow transmitter (RC-14B-FT2) sustained damage.

Channel was restored to operability at 1500 on November 9,1982.

l DESIGNATION OF APPARENT CAUSE:

The failure of RC-14A-FT2 was caused by a shorted capacitor in the transmitter power supply,.

The failure of RC-14B-FT2 was caused by inoperable bellows. At this time, it is believed that the bellows failed due to improperly isolating the transmitter to perform a channel calibration.

ANALYSIS OF OCCURRENCE:

There was no effect on public health or safety. Nuclear Overpower Channels A, C, and D were

operable to provide the necessary trip function.

CORRECTIVE ACTION:

The capacitor and bellows were replaced, the channel was recalibrated and functionally tested satisfactorily.

, FAILURE DATA:

This is the fourth fai!vre for Channel "B" and the twentieth report under Technical

, Specification 3.3.1.1.

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