ML20003D544
| ML20003D544 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/20/1981 |
| From: | Trimble D ARKANSAS POWER & LIGHT CO. |
| To: | Stolz J Office of Nuclear Reactor Regulation |
| References | |
| IR-0381-07, IR-381-7, NUDOCS 8103270641 | |
| Download: ML20003D544 (2) | |
Text
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ARKANSAS POWER & LIGHT COMPANY POST OFRCE BOX 551 UTTLE ROCK, ARKANSAS 72203 (501)371-4000 March 20, 1981 IR-0381-07 D
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Director. of Nuclear Reactor Regulation X
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Mr. J. F. Stolz, Chief h,
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Operating Reactors Branch #4
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Division of Licensing
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U. S. Nuclear Regulatory Commission V
Washington, D. C. 20555 Subj ect:
Arkansas Nuclear One-Unit 1
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Docket No. 50-313 D
License No. DPR-51 Failed Fuel Evaluation Scope (File:
1510.5)
Gentlemen:
As committed to in our March 4, 1981 letter describing the overall ANO-1, failed fuel evaluation plans, we are submitting a more detailed scope of' our efforts to determine the cause of the failed fuel that occurred during Cycle 4 operation. This evaluation will be done in a manner that will allow termination of the evaluation at any point in time that the mechanism leading to failed fuel is identified or that it is determined to be impracticable to pursue further.
Our initial efforts will include more detailed data acquisition than in the past with input from other B&W plants having experienced failed fuel. Analys-s will be performed on the data to explain any unusual I
trends that have occurred, even thcugh they appear to be within the bounds of present limits, to see if a combination of factors has led to the fuel failures.
The fuel will then be visually examined as appro-priate to verify any conclusions reached from the data analyses. Pre-sently, this may include TV re-examination, periscope examination and crud sample analysis. Every effort will be nade to complete this ini-tial work prior to the submittal of the Augutt 26, 1981 status report.
The second step will be a feasibility study of the various post ir-radiation examination methods other than those described above to better define the al.propriateness of their usage.
Probability type evaluations will be made so that if the initial examinations indicate that further examinations are needed, AP&L will be in a position to decide which alternative, if any, is most likely o result in ascertaining the cause of the failed fuel.
t 8103270641 MEMBER MIOrid SOUTH tJT1UTIES SYSTEM
4 The final step is the failure examination to be done if ihe method of failure has been identified.
This could include simulation computer runs and studies of the impact of operational conditions leading to failed fuel.
The schedules for the second and final steps are dependent to some extent in each case on the initial results when they are completed.
Therefore, when the August 26, 1981 status report is made, AP&L will be in a position to better define those schedules and will include that information.
ihe above information is provided to further clarify the continuing effort that AP&L is making to ensure a thorough investigation into the cause of ANO-1 failed fuel.
Very truly yours, 0 fk David C. Trimble Manager, Licensing DCT:LDY:nak
$98
.