ML022490214

July 2002 Monthly Operating Report for Univ of Missouri Research Reactor

ML022490214
Person / Time
Site:	University of Missouri-Columbia
Issue date:	08/29/2002
From:	Hobbs P Univ of Missouri - Columbia
To:	Alexander Adams Office of Nuclear Reactor Regulation
References
Download: ML022490214 (5)

Text

Research Park Research Reactor Center Columbia, MO 65211 University of Missouri-Columbia PHO*-N (573) 882-4211 FAX (573) 882-6360 August 29, 2002 op 0>Q-i 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 July 2002. If you have any questions, please contact me at (573) 882-5264.

Sincerely, Paul S. Hobbs, PE Reactor Manager PSHIlmcg cc. Craig Bassett Enclosure

/0" 0 AN EQUAL OPPORTUNITY/ADA INSTITUTION

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JQILEf 2002 Preyarecdly:

Operations Staff

INTRODUCTION The reactor operated continuously in July with the following exceptions: six shutdowns for scheduled maintenance and refueling; one unscheduled shutdown. Received notification from the NRC that two new Reactor Operator licenses had been issued.

MAINTENANCE ACTIVITIES 7/1/02 Refueled - removed core 02-31, loaded core 02-32.

7/3/02 Refueled - removed core 02-32, loaded core 02-33.

Replaced Anti-Siphon Valve 543B air actuator.

7/8/02 Refueled - removed core 02-33, loaded core 02-34.

7/15/02 Refueled - removed core 02-34, loaded core 02-35.

Re-installed keeper pin in the northwest Pressure Vessel tie-rod support.

7/16/02 Replaced control transformer for P501A (primary system pump) control circuit.

7/22/02 Refueled - removed core 02-35, loaded core 02-36.

7/25/02 Refueled - removed core 02-36, loaded core 02-37.

7/29/02 Refueled - removed core 02-37, loaded core 02-38.

UNSCHEDULED SHUTDOWNS Date No. Type Cause 7/25/02 1143 Scram PT-917 (reflector low AP)

On July 25, a Reactor Scram was initiated automatically by PT-917 (reflector low AP) when the differential pressure across the reflector momentarily dropped below the Scram setpoint. This setpoint had been changed on July 22 during the performance of CP-5. It was determined that during the performance of CP-5 on July 22 there was air in the lines from the pressure test unit causing the setpoint to be changed. This change was in the conservative direction and placed the setpoint within close proximity of actual operating differential pressure. CP-5 was performed again after flushing the test lines and the setpoint was reset to allow for normal operating pressure transients without inadvertently actuating the protective function of PT-917.

OPERATION

SUMMARY

FOR MONTH OF University of Missour Research Reactor Center (MURR)

HOURS OPERATED THIS PERIOD S 62492 I244,122.92'-!

TOTAL HOURS OPERATED, REACTOR HOURS OPERATED AT FULL POWER, THIS PERIOD 61997 TOTAL HOURS AT FULL POWER, REACTOR 240,871.00 25864 IMWD INTEGRATED POWER THIS PERIOD TOTAL INTEGRATED POWER, REACTOR 94,560.23 MWD Submitted by:

MWD Custodian/Reactor Physicist Date.

I I