ML19325D730
| ML19325D730 | |
| Person / Time | |
|---|---|
| Site: | University of Maryland |
| Issue date: | 10/18/1989 |
| From: | Roush M MARYLAND, UNIV. OF, COLLEGE PARK, MD |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8910260042 | |
| Download: ML19325D730 (2) | |
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,; -r5 Qu _ _ -. r WlE UNNARSITY Cf MARYLAND COLLEGE PARK CAMrtlS Department of Chernical and Nuclear Enginectarq College hrk. Mary:snc 20742 (305) 454-t Detther 18,1989 Section 50.4 Distribution i Dacument Control Desk ,
U.S. Nuclear Regulatory Commission <
Washington, D.C. 20555 l
Dear SirAtadam:
Subject:
Reportable Occurrence of 13:09 on October 11, 1989 at the hiUTR l Docket #R 70 On October 11, 1989, as pan of a power calibnition, a data aco,uisition system (DAS) ,
war connected to several sensors. One of the sensors that was connected is a spare ;
thennoccuple in the fuel. In the process of making this connection, a set of thermocouple !
leads, which were thought to be a set of spares, was disconnected from a tenninal strip in the intennediate junction box. Soon thereafter, the reactor was brought to 200 kW at 15:07. The !
operator noticed the fuel temperature meter was reading 0 *C and scrammed the reactor at l 15:09. Upon subsequent investigation the proper reconnection of the thermecouple leads was made. The reactor was restaned and the fuel temperature meter was monitored wriile increasing r power; the meter was observed to rotate as it had before the disconnection.
During the 200 kW operation, the DAS connected to the spare thermocouple in the fuel l displayed the fuel temperature, which at no time exceeded 110 *C, Since 110 'C is well below the Safety ulmit of 1000 'C and the Limiting Safety System Scipoint of 400 *C, there is no l possibility of fuel da.': age. The health and safety of both the public and the reactor personnel were in ta way compromised or tnreatened by the occurrence or its consequer.ces.
Telephone notification of the reportable occurrence was made by Mr. Bernard White to Mr. Kirk Lathrop, at the NRC Region I, on October 12 at 10 AM.
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L 8910263042 891018 ' 'N# '
)~ PDR ADOCK 05000070 S PNV
Pcge F Ltr. - U.S. NRC g
October *18,1989 To minimize the pmbability of rewcurrence of a similar event, all wires running to >
and from the terminal strip are now clearly labeled. Also the event will be used in our training program to emphasize to operators of the importance of temperature readngs. ;
Sincerely, 2
%Marvin L. Roush Professor / Chairman F Chemical and Nuclear L Engineering i
cc: Dean George Dieter !
Dr. David D. Ebert, Reactor Director Dr. Frank Munno, Chairman, Nuclear Engineering Program ;
Mr. Bernarti H. White IV, Reactor Operations Manager MUTR File Mr. Lowell E. Tripp, Chief ,
Reactor Pmiects Section 3A :
U.S. Nuclear Regulatory Commission Region 1 475 Allendale Rd.
King of Ihissia, Pa 19406 Mr. David F. Limroth, Project inspector U.S. Nuclear Regulatory Commission Region I :
475 Allendale Rd.
King of Prussia, Pa 19406 E
o s,.,