ML030240273
| ML030240273 | |
| Person / Time | |
|---|---|
| Site: | University of Missouri-Columbia |
| Issue date: | 01/10/2003 |
| From: | Hobbs P Univ of Missouri - Columbia |
| To: | Alexander Adams Office of Nuclear Reactor Regulation |
| References | |
| Download: ML030240273 (5) | |
Text
Research Reactor Center University of Missouri-Columbia Research Park Columbia, MO 65211 PiioNE (573) 882-4211 FAX (573) 882-6360 January 10, 2003 Mr. Alexander Adams, Jr.
U.S. Nuclear Regulatory Commission Mail Stop 012-G13 Washington, DC 20555-0001
SUBJECT:
Monthly Operations Summary Enclosed is a copy of MURR's Monthly Operations Summary for December, 2002. If you have any questions, please contact me at (573) 882-5264.
Paul S. Hobbs, PE Reactor Manager PSH/lmcg cc. Craig Bassett Enclosure 2 qVV AN EQjAL oPPomrTurNy/ADA iNsTrrLtMON
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INTRODUCTION The reactor operated continuously in December with the following exceptions: five shutdowns for scheduled maintenance and refueling; one unscheduled shutdown.
MAINTENANCE ACTIVITIES 12/2/02 Refueled - removed core 02-62, loaded core 02-63.
12/9/02 Refueled - removed core 02-63, loaded core 02-64.
12/16/02 Refueled - removed core 02-64, loaded core 02-65.
12/23/02 Refueled - removed core 02-65, loaded core 02-66.
12/30/02 Refueled - removed core 02-66, loaded core 02-67.
Completed the biennial change out of Control Blade "D" Offset Mechanism.
UNSCHEDULED SHUTDOWNS Date No.
T Cause 12/16/02 1156 Scram Calculated reactivity in excess of Technical Specification limit.
On December 16, a manual Reactor Scram was initiated during a reactor startup to perform RTP-17B (Flux Trap Loads Reactivity Worth) when the measured reactivity of the flux trap sample holder and samples appeared to be in excess of the limit in Technical Specification 3.1.h.
The flux trap sample loading was verified to be correct and RTP-1 1D (Differential Control Rod Reactivity Worth) was performed on Blade "B" to verify its worth since it was the blade being used to determine the flux trap reactivity. RTP-1 ID revealed a change in Blade "B" worth since its installation as a new blade in May of 2002. This change is due to normal bum up of the control blade while in operation.
The reactivity worth of the flux trap was re-measured using the corrected Blade "B" rod worth and it was determined that the flux trap reactivity was well within Technical Specification limits.
The flux trap was reloaded to a lower reactivity value and RTP-17B was again performed yielding expected results. The reactor was subsequently returned to full power operation.
Dec OPERATION
SUMMARY
FOR MONTH OF University of Missour Research Reactor Center (MURR)
HOURS OPERATED THIS PERIOD TOTAL HOURS OPERATED, REACTOR HOURS OPERATED AT FULL POWER, THIS PERIOD TOTAL HOURS AT FULL POWER, REACTOR INTEGRATED POWER THIS PERIOD TOTAL INTEGRATED POWER, REACTOR 665.12 247,357.58 658.11 244,084 58 I 27435 IMWD 95,90025 MWD
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MWD Custodian/Reactor Physicist Date 1.