ML20248E133

Annual Rept for 880801-890731

ML20248E133
Person / Time
Site:	05000356
Issue date:	07/31/1989
From:	ILLINOIS, UNIV. OF, URBANA, IL
To:
Shared Package
ML19324D199	List: ML20248E108 ML20248E133 ML20248E147 ML20248E288
References
NUDOCS 8910050074
Download: ML20248E133 (2)

Text

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ANNUAL REPORT August 1. 1988 - July 31,-1989 ILLINOIS LOPRA REACTOR Facility License R-117

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SUMMARY

OF OPERATING EXPERIENCE The reactor was scheduled for operations a total of.36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> and was in actual operation a total of 16.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />. Scheduled time is less this year because no maintenance and no laboratory measurements were performed other than those which are a part of the Student Experiments. Student Experiments include an " Approach to Critical " fuel loading experiment in the LOPRA and the determination of Control Rod Worth by sub critical multiplication. The-time. involved with Surveillance Requirements includes power calibrations, control. rod worth determinations and fuel inspections. Scheduled time includes time for activities such as fuel inspections which don't require actual operation of the LOPRA. Over 99.9 % of the energy listed in Section 11-was generated during the two power calibrations performed during this reporting period. No maintenance was required during this time reporting period. A large amount of maintenance was performed in the last two reporting periods.

This.was performed in anticipation of re-licensing the LOPRA in November of 1989.

Ma'intenance 0% 1

' Student Experiments 44 %

Surveillance' Requirements 56 %

Laboratory Measurements 0%

Total 100 %

li. TABULATION OF OPERATIONS Hours Criticalm and Enerov 16.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> 6.19 kW-hrs

• This time includes that for loading fuel elements during the Approach to Critical experiment and sub-critical time during the control rod calibration. The control rods are calibrated using sub-critical multiplication so that a large portion of the experiment is done wi t ti t h e reactor sub-critical. The actual critical time was about 4.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> or 28% of the above time.

111. EMERGENCY SHUTDOWNS AND INADVERTENT SCRAMS There were no unplanned scrams or emergency shutdowns during this reporting period.

IV. MAINTENANCE There were no significant items of maintenance performed during this reporting period.

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V. CONDITIONS UNDER SECTION 50.59 OF 10 CFR 50-fi There were no changes to procedures or new experiments during this pertoo. The excess reactivity of the LOPRA core was' increased from 22 cents-to-26 cents during this reporting period. It.is felt that this increase 'in. excess reactivsty. .is due to the change in orientation which occurs in'the core when fuel is loaded back into' the core during the Approach to Critical Experiment.This increase leaves the excess reactivity well below the maximum Technical Specification. limit of 60 cents.

VI., Vll., Viti., RADIOACTIVITY Because of the lower power and infrequent use.of the LOPRA, its operation' does not contribute to the release of effluents. Personnel radiation exposures for the laboratory are. given,in the Annual Report for the Advanced TRIGA Reactor, License No. R-115. Docket No. 50-151, dated February 29, 1988, r

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