ML20024F679
| ML20024F679 | |
| Person / Time | |
|---|---|
| Site: | University of Utah |
| Issue date: | 06/30/1983 |
| From: | Crawford K, Jacobs H UTAH, UNIV. OF, SALT LAKE CITY, UT |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| NUDOCS 8309090571 | |
| Download: ML20024F679 (3) | |
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The University of Utah TRIGA Reactor Annual Operating Report July 1,1932 to June 30, 1983 A. NARRATIVE
- 1. Operating Experience The reactor was critical 70.55 hours6.365741e-4 days <br />0.0153 hours <br />9.093915e-5 weeks <br />2.09275e-5 months <br /> and produced 447S.4 khh of power. The 'IRIGA was used for laboratory teaching, system tests, power measurements, as sample irradiations .
- 2. Changes in Facility Design No changes in facility design were made during the reporting period.
- 3. Surveillance Tests
- a. Control Rod Worth
_ Core Configuration #14 9 August 1982 Safety $1.66 Shim $1.61 Reg
$ .43 Excess Reactivity $1.39 Shut Down Margin $ .65 Core Configuration #14 1 February 1983 Safety $1.69 Shim $1.55 Reg $ .43 Excess Reactivity $1.30 Shut Down Margin ,
$ .68 Core Configuration #15 3 March 1983 Safety -
$1.76 Shim $1.33 Reg $ .38 Excess Reactivity '
$1.05 Shut Down Margin $ .66 Core Configuration #15 19 May 1983 Safety $1.70 Shim $1.23 Reg' $ .46 Excess Reactivity $1.11 Shut Down Margin $ .5.8 8309090571 830901 PDR ADOCK 0500040 R -
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- b. Control nod Inspection The biennial control rod inspection is scheduled for January, 1984. Rod drop times were measured 8/9/83, 2/1/83, 3/3/83, and 5/19/83. All rod drop times were found to be less than .5 seconds.
- c. Reactor Power Level Calorimetric power calibrations were performed 8/4/32,8/27/S2, and 2/8/83. The following results were obtained.
Date Meter Actual 8/4/82 80 idi 46 kW 8/27/82 84 kW S? kN 2/3/83 33 LN '6 'E The differences between meter and actual readings occur because of core configuration changes and channel calibrations.
- d. Fuel Inspection Biennial fuel inspection is scheduled for January,1984.
- e. Fuel Temperature Calibration Fuel temperature circuits were calibrated 8/2/82 and 2/23/83.
The rangecircuits O C to 500 wereC.calibrated to less than 5 C error over the B. ENERGY OUTPUT i
The reactor was critical for 70.55 hours6.365741e-4 days <br />0.0153 hours <br />9.093915e-5 weeks <br />2.09275e-5 months <br />.and produced 4475.4 3dih of energy. The total hours operated since initial criticality is 639.24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. l and the total energy produced is 23888.4 khh.
C. INADVERTANT SCRAN1S -
Number g Cause Action -
5 Power Supply Voltage drop to '
Initial: restart or ion chamber terminate power supply Final: repair scram relay 2- Linear Recorder Scale shift Caution trainee on signal spike proper scale shift 1 Linear Recorder Signal spike Restart (source unknown) 1 High Log Calibration Restart 1 Linear Recorder x-y plotter Restart feedback 1 Not classified Weak Magnet Increase magnet current
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D. SLUOR bl%IATENANCE .
systemA new floor mounted recirculator pump was installed in the deminerizer in September,1982.
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Ventilation damper solenoids were replaced March 1983.
lieavy water tanks drained and cleaned April-May,1983. Tanks were reinstalled after procedure.
E. OL\NGES PURSUAhT 'IO 50-59 The " Procedure to Change Tank Water" was changed, then reviewed
. and approved by the Reactor Safety Committee.
F. RADI0 ACTIVE EFFLUEhTS
- 1. Liquil W:ste - None
- 2. Gaseous Waste - Negligible
- The TRIGA was mn for 4475.4 kWh at powers to approximately 80 kW.
At this level Ar-41 production is negligible. Our stack monitor will detect nothing 33%
in the of 10 CFR 20 Table I for Ar-41 and we have seen monitor.
- 3. Solid Waste - None O9 &>W G. RADIATION EXPOSURES AND SURVEYS Name Dose G.M. Sandquist Minimal (less than 10 mrem, gamma and x-ray)
K.C. Crawford Minimal K. Farid Minimal Control : 10 mrem No staff member received more than 100 m rem /yr. No visitors received a measurable dose. Monthly surveys have indicated no contamination.
H. ENVIROMHNTAL SURVEY Environmental surveys have been taken continuously sinco constmetion of the reactor and the latest report of 12 October 1982 has identified no measurable increase in radiation. The Protection Agency installed an air monitoring station outside the reactor building two years ago. The system monitors tritium in moisture, noble gases, gamma radiation, and particulates.
Information fmm this station has indicated no unusual changes in radiation.
Prepared v4ML/
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Approved by_j
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l DEP ARTMENT OF F.s=na~a..,~o UNMERSffY 0 UTAH ;im c1._,2 1 September 1983 Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Director:
Enclosed you will find a copy of the Annual Operating Report for The University of Utah TRIGA reactor covering the period from July 1, 1982 to June 30, 1983.
If you should have any questions concerning the report please let me know.
Sinc 'ely, Harold R. Jacobs Reactor Administrator jro Enclosure h
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