ML20058H468

Forwards Annual Summary of Changes,Tests & Experiments Performed at Aerotest Radiography & Research Reactor for Period Ending 820630

ML20058H468
Person / Time
Site:	Aerotest
Issue date:	07/21/1982
From:	Haskins J AEROTEST OPERATIONS, INC.
To:	Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20058H475	List: ML20058H468 ML20058H504
References
NUDOCS 8208030589
Download: ML20058H468 (1)

Text

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, . e AEROTEST OPER ATIONS, INC.

1. A 3455 FOSTORI A WAY . SAN RAMON, CALIFORNI A 94583 .(415) 837 4248 C?

21 July 1982 Mr. Daniel M. Sternberg U. S. Nuc1 car Regulatory Commission, Region V l Reactor Operations & Nuclear Safety Branch 1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

Annual Summary of Changes, Tests, and Experiments at Acrotest Radiography and Research Reactor (ARRR).

Docket No. 50-228, for period ending 6-30-82

Dear Mr. Sternberg:

This report summarizes the operation of the ARRR during the seventeenth year of operation. This information is submitted in compliance with the requirements of 10 CFR, Part 50.59, " Authorization of Changes, Tests and Experd unts."

Included is a monthly operational summary and a summary of unscheduled power reductions.

Two hundred and seventy-six megawatt hours of ARRR operation were accumulated during the seventeenth year of operation and 102 service irradiations were performed. A total of 31 unscheduled power reductions occurred during the year. The largest single cause of these reductions was spurious fast period trips on Channel 2. Extensive effort was expended to correct this problem with a final solution involving replacement of the 10 turn calibration potentio-meters. No further scrams of this nature have occurred since this replacement.

The number of unscheduled power reductions has been reduced by more than a factor of two over last year.

The shield block configuration around the reactor was changed to reduce i

radiation exposure and steel restraints were added to provide earthquake i protection. An uninterruptible power supply was purchased and installed but dges not perform reliably on a continuous basis. Discussions with the manu-facturer continue in an effort to resolve the problem.

Operation of the reactor continues to be safe and efficient without major changes or problems.

. Very truly yours, QN AER0 TEST OPERATIONS, INC.

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/ [Jerr J' Haskins Manager, Reactor Operations Encl.

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