05000302/LER-1982-063, Forwards LER 82-063/03L-0.Detailed Event Analysis Encl

Forwards LER 82-063/03L-0.Detailed Event Analysis Encl

ML20028A523
Person / Time
Site:	Crystal River
Issue date:	11/10/1982
From:	Baynard P FLORIDA POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20028A524	List: 05000302/LER-1982-063, Forwards LER 82-063/03L-0.Detailed Event Analysis Encl 05000302/LER-1982-063-03, /03L-0:on 821011,reactor Bldg Average Air Temp Exceeded 130 F Limit.Caused by Strain on Instrument Air Line Causing Line to Split.Line Replaced on 821011
References
3F-1182-12, NUDOCS 8211220260
Download: ML20028A523 (2)

LER-1982-063, Forwards LER 82-063/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3021982063R00 - NRC Website

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1. 3F-il82-12 File: 3-0-3-a-1 Mr. James P. O'Reilly Regional Administrator, Region 11 U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement 101 Marietta St. 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. 82-063

Dear Mr. O'Reilly:

Enclosed please find Licensee Event Report No. 82-063 and the attached supplementary information sheet, which are submitted in accordance with Technical Specification 6.9.1.9.b. Shou'd there be any questions, please contact this office. Very truly yours, lf'bpeuL ak P. Y. Baynard Assistant to Vice President Nuclear Operations PGH/ mig Enclosure i cc: Document Control Desk k U.S. Nuclear Regulatory Commission f,' Washington, D.C. 20555 P 8211220260 321110 PDR ADOCK 00000302 g PDR General Office 3201 Tnirty fourtn street soutn. P O Box 14042. st Petersburg. Florida 33/33 813-866-5151 J

1 p 4 9 SUPPLEMENTARY INFORMATION l REPORT NO: 50-302/82-063/03L-0 FACILITY: Crystal River Unit #3 REPORT DA'IE: November 10,1982 OCCURRENCE DATE: October 11,1982 IDENTIFICATION OF OCCURRENCE: The reactor building average air temperature exceeded the 1300F limit of i Technical Specification 3.6.1.5. CONDITIONS PRIOR TO OCCURRENCE: MODE I (97% FULL POWER). j DESCRIPTION OF OCCURRENCE: i At 0345, on October 11, 1982, the reactor building average air temperature l reached 131.40F. Air handling coolers were started and the reactor building temperature was decreased to within limit by 0530. l An investigation revealed a ruptured instrument air line on the Industrial Cooling Tower damper control. Loss of instrument air to the damper controllers caused the dampers to fail closed. This increased the temperature of the water supplied to the reactor building coolers. This subsequently led to the high reactor building temperature. The dampers were temporarily modified to maintain the open ? position until replacement of the ruptured instrument air line was complete. l DESIGNATION OF APPARENT CAUSE: This event was caused by a component failure. The short instrument air lines were not installed in a configuration to withstand normal strains over a long period of time. Strain on the line to the damper controller caused the line to rupture. ANA!,YSIS OF OCCURRENCE: There was no effect on public 1.ealth or safety. Nuclear closed cycle cooling was t available to provide emergency cooling if required.

CORRECTIVE ACTION

The instrument air lines were replaced with longer lines on October 10,1982. FAILURE DATA: This was the ninth time the reactor building temperature exceeded the 1300F limit. i , ~. _ _ _. _, _ - -. _.., _ _ }}