ML20024A895

Annual Operating Rept for 1982.

ML20024A895
Person / Time
Site:	Idaho State University
Issue date:	06/23/1983
From:	Tanya Smith IOWA STATE UNIV., AMES, IA
To:	Reid R Office of Nuclear Reactor Regulation
References
NUDOCS 8307010151
Download: ML20024A895 (3)

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I l Idaho State University Pocatello, Idaho 83209 School of Engineering Box 8060 (208) 236-2281 June 23,1983 Robert W. Reid, Chief Operating Reactor Branch #4 Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, DC 20555

Dear Sir:

Attached is the Annual Operating Report for the Idaho State University AGN-201 Nuclear Reactor, License R-110, Docket No. 50-284, for the calendar year, 1982.

Respectfully su itted, ,,

Terry W. Smith Reactor Supervisor TMS:bgs CC: A. Wilson, Reactor Administrator Document Management Branch (NCR)

Enclosure 8307010151 830623

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ANNUAL OPERATING REPORT 1982 Idaho State University AGN-201 Nuclear Reactor Pocatello, ID 83209

1) Brief Narrative of Changes There have.been no changes in facility design, performance characteristics or operating procedures relating to reactor safety during calendar year,1982.

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Major surveillance was performed during the period in accordance with the Technical Specifications; the following is a summary of the results:

a) A visual inspection of the control rod drive mechanisms was satisfactory.

3 b) Scram drop times of all control rods were less than 100 milli-1 seconds.

c) Rod run-up times were measured and average reactivity ' insertion rates calculated.. The maximum average reactivity insertion rate was .033%/second, for Safety Rod One, d) Channel tests of all safety. channels and interlocks have been

. sati sfactory.

e) Power and period calibrations were performed and no significant changes fnmn the previous calibration were found, f) The shield tank was inspected and no excessive corrosion or water laakage was apparent.

g) Shutdown margin was measured and .found to be 1.88% reactivity.

2) Monthly Tabulation of Reactor Operating Hours for 1982 Month Hours' Month Hours l January 3.57 July 0.68 February 13.63 August _ <

March 7~72

. . September 6.18 L April 11.17 October 7.57'

~May 3.15. November - 1.77-June December 0.68

3) List of Unscheduled Shutdowns

None l :.

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e5 Annual Operating Report AGN-201 Nuclear Reactor -

Page Two  ;

4) Discussion of Major Safety Related Corrective Maintenance On July 22, 1982, it was noted that Instrument Number 3 was reading

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approximately three times higher than normal while the reactor was shutdown.  ?

The high reading was caused by a few pin hole leaks in the aluminum instru-ment housing inside the primary shield tank. The leaks allowed a few drops y of water near the BNC connection on the ion chamber, which allowed a small 1 amount of electrical current to flow between them. The instrument was _

periodically dried out using a vacuum and some polytubing, The housing was f removed and repaired on December 17, 1982.

5) Changes to the Facility a) There have been no changes to the facility as described in the 2 application for license. '

a b) There have been no changes to the procedures as described in [

the facility Technical Specifications. ,

c) There have been no new or untried experiments or tests performed during the reporting period, t

6) Summary of Safety Evaluations ,

j There have been no new changes, tests, or experiments approved or 7 performed during this reporting period.

7) Summary of Radioactive Effluents Released or Discharged to the Environment Liquid Airborne Solid -

Curies Volume Curies Volume Curies Volume I A

0 0 0 0 0 0 1

8) Summary of Radiological Surveys Outside the Facility On May 19,1982, the radiation field outside the reactor roo:o was measured R

with the reactor operating at 5 watts. The maximum radiation field was 1.6 mR/hr @

due to gamma radiation on contact with the outside wall. This field was subse- T quently reduced to a maximum of 1.1 mR/hr by additional concrete block shieldiy 1 on the inside walls of the reactor room.

9) Radiation Exposure -

No person received greater than 50 millirem during this reporting period.

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