ML042990461

September 2004 Monthly Operations Report for University of Missouri Research Reactor Facility

ML042990461
Person / Time
Site:	University of Missouri-Columbia
Issue date:	10/12/2004
From:	Foyto L Univ of Missouri - Columbia
To:	Alexander Adams Office of Nuclear Reactor Regulation
References
Download: ML042990461 (5)

Text

r Research Park I Research Reactor Center Columbia, MO 65211 r

0 University of Missouri-Columbia PioNE (573) 8824211 FAx (573) 882-6360 October 12, 2004 Mr. Alexander Adams, Jr.

U.S. Nuclear Regulatory Commission Mail Stop 012-G13 Washington, DC 20555-0001

SUBJECT:

University of Missouri Research Reactor Facility Docket No. 50-186 Monthly Operations Summary

Dear Mr. Adams:

Enclosed is a copy of MURR's Monthly Operations Summary for September 2004. If you have any questions, please contact me at (573) 882-5276.

Sincerely, Leslie Foyto Reactor Manager LM/sm cc. Craig Bassett

Enclosure:

September Operation Summary - 4 pages yC_0 2Y AN EQUAL OPPOR'rUrY/ADA LNsTrnUrION

QUrVERSIVYOf .*J4r 155011 PI RESEAR¶'kC-f REACTOR OPET.A'YITOJS !MO*Af-LY SWMAlvtfRY September 2004 Preyaredby:

OyerationsStaff

INTRODUCTION The reactor operated continuously in September with the following exceptions: 4 shutdowns for scheduled maintenance and refueling; 1 unscheduled shutdown.

MAINTENANCE ACTIVITIES 9/6/04 Refueled - removed core 04-41, loaded core 04-42.

Performed backflush on the Pool Coolant System Heat Exchanger.

9/13/04 Refueled - removed core 04-42, loaded core 04-43.

Completed Modification Record 88-11, Add. 1; "Upgrade of Uninterruptible Power Supply Alternate Source."

9/20/04 Refueled - removed core 04-43, loaded core 04-44.

Completed Modification Record 04-4; "Reactor Control Console Upgrade."

Replaced isolator on Nuclear Instrumentation Signal Processor Drawer No. 1.

9/25/04 Refueled - removed core 04-44, loaded core 04-45.

Replaced cabling and fission chamber detector for Nuclear Instrumentation Signal Processor Drawer No. 1.

9/27/04 Refueled - removed core 04-45, loaded core 04-46.

Completed CP-29 (Calibration of the NMC RAK Stack Monitor)

UNSCHEDULED SHUTD OWNS Date No. Type Cause 9/25/04 1174 Scram Ihstrumentation Signal Processor Drawer No. I Detector Cable failure On September 25, a reactor scram was automatically initiated when meter indications on Nuclear Instrumentation (NI) Signal Processor Drawer No. 1 pegged high, thus causing a reactor safety system trip. Troubleshooting efforts revealed a breakdown-of the signal cabling insulation near the fission chamber detector located in the reactor pool. This type of failure is typical of NI detector cabling that has been installed over two years. The fission detector and its associated cabling were replaced and the drawer was verified to be operable. The reactor was refueled and subsequently returned to 10 MW operation.

OPERATION

SUMMARY

FOR MONTH OF I Sep-04 University of Missour Research Reactor Center (MURR)

HOURS OPERATED THIS PERIOD 1 645.97 TOTAL HOURS OPERATED, REACTOR 1 261,213.05 HOURS OPERATED AT FULL POWER, THIS PERIOD l 644.10 TOTAL HOURS AT FULL POWER, REACTOR L 257,879.42 INTEGRATED POWER THIS PERIOD 1 268.46 l MWD TOTAL INTEGRATED POWER, REACTOR i 101,650.69 l MWD Submitted by: By L MWD Custodian/Reactor Physicist Date:

.1.0 6 t o SL