ML20080P243

Univ of Utah Triga Reactor Annual Operating Rept,Jul 1982 - June 1983

ML20080P243
Person / Time
Site:	University of Utah
Issue date:	06/30/1983
From:	Crawford K, Jacobs H UTAH, UNIV. OF, SALT LAKE CITY, UT
To:	Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
NUDOCS 8402220479
Download: ML20080P243 (4)

Text

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. ' 1-The University of Utah TRIGA Reactor Annual Operating Report July 1, 1982 to June 30, 1983

/.. 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 4475.4 LKh of power. The TRIGA 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 $ .58 8402220479 830630 PDR ADOCK 05000407

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b. Control Rod Inspection The biennial control rod inspection is scheduled for January, 1984. Rod drop times were measured 8/9/83, 2/1/S3, 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 perfonned 8/4/82, 8/27/82, and 2/8/83. The following results were obtained.

Date Meter Actual 8/4/82 80 Mi. 46 kii .

8/27/82 84 kW S2 kW 2/3/83 80 k'i 26 L'd 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 circuits were calibrated to less than 5'C error over the range O C to 500 C.

B. ENERGY OUTPUT 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 kWh 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 />.

and the total energy produced is 23888.4 kWh.

C. . INADVERTANT SCRAMS -

Nunber Type ~Cause Action -

5 Power Supply Voltage drop to Initial: restart or -

ion chamber tenninate 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 Restart

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D. SlUOR bllIATENANCE system A new floor mounted in September, 1982. recirculator pump was installed in the deminerizer Ventilation damper solenoids were replaced March 1983.

f water tanks drained and cicaned April-May,1933.

Ileav' were reinstalled after procedure. Tanks E. OTANGES PURSUA\T 'IO 50-59 The " Procedure to Change Tank Water" was changed, then reviewed and approved by the Reactor Safety Comittee.

F. RADIOACTIVE EFFLUEhTS

1. Lignd tiane - No::e

2. Gaseous Waste - Negligible The TRIGA was run for 4475.4 khh at powers to approximately 80 kW.

At this 1cvel 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 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 hiinimal Control  ; 10 mrem No staff member received more than 100 m rem /yr. No visitors received a measurable dose. Monthly surveys have indicau:d no contamination.

! H. ENVIRONMENTAL SURVEY Environmental surveys have been taken continuously since construction of the reactor and the latest report of 12 October 1982 has irantified no neasurable increase in radiation. The Protection Agency installed an air nonitoring station outside the reactor building two years ago. The system conitors tritium in moisture, nobic gases, gamma radiation, and particulates.

Infomation from this station has indicated no unusual changes in radiation.

i Prepared -

Se r Reactor eer Approved by , //

/ Reactor' Admin 15pator~

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.. c lpQZW MECH I L ND INDUSTRIAL ENGINEERING G UTAH tStia c,rv.ur--e 1 September 1983 W. C. Seidle E $hbb 1

Chief Reactor Operations and b Nuc1 car Support Branch 1 SEP - 81983 U.S. N.R.C. Region IV 611 Ryan Plaza Drive, Suite 1000 L --

Arlir.gton, Texas 76011

Dear Mr. Seidle:

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 Jime 30, 1983.

If you should have any questions concerning the report please let me know.

9 in rely, g7l f &

Harold R. acobs Reactor Administrator jro Enclosure

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