ML20066A573

Ro:On 820928,during Operation,Fuel Temp Thermocouple Failed. New Instrumented Fuel Element Installed.Thermocouple Readings Normal

ML20066A573
Person / Time
Site:	05000128
Issue date:	10/05/1982
From:	Rogers D TEXAS A&M UNIV., COLLEGE STATION, TX
To:	Madsen G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 8211060122
Download: ML20066A573 (2)

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TEXAS ENGINEERING EXPERIMENT STATION THE TEXAS A&M UNIVERSITY SYSTEM COLLEGE STATION, TEXAS 77843

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5 October 1982 s -

Y' 'd7 NUCLEAR 71 SST 5CIEbCE Mr. G. L. Madsen Office of Inspection and Enforcement Region IV U.S. Nuclear Regulatory Commission -

611 Ryan Plaza, Suite 1000 Arlington, Texas 76012

Subject:

Failure of Fuel Temperature Thermocouple During Reactor Operation Reported 9-29-82

Dear Mr. Madsen:

Enclosed is a final report of a reportable occurrence observed during reactor operations of the NSCR. This report is submitted in compliance with Section 6.4 and 1.8c of Change No.11 of the Technical Specifications, Facility License No. R-83 for the Nuclear Science Center, Texas A&M University.

Sin erely, Dale Rogers,f nager Reactor Operations ,

OR/ym Enclosure M

8211060122 821005 PDR ADOCK 05000128 S PDR RESEARCH AND DEVELOPMENT FOR MANKIND k _

. i Final Report of Violation Due to Failure of Fuel Temperature Thermocouple During Reactor Operations Reportable Occurrence On September 28,1982 at 2212 while operating at power the reactor operator noted erratic readings on the fuel temperature indicator. The reactor was immediately shutdown, and NSC management was notified. On September 29, 1982 a different instrumented fuel element (IF) was connected to the Fuel Temperature Channel, and thermoccuple readings were recorded and compared with pool water temperature.

Readings were again checked at 300 watts and at 1 Megawatt. Readings appeared to be normal and were observed throughout the day. However, at 2319 after approximately 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> of operation erratic readings were once again observed, and the reactor was shutdown.

Corrective Action On Thursday and Friday (9/30/82,10/1/82) a new IF was prepared and ir. stalled in the core. The reactor was not operated until Monday, 4 October l'182 at which time thermocouple readings were observed to be normal. No fu.ther problems have been noted and the new IF thermocouple readings will be kept under close visual observation.

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