ML20079G190
| ML20079G190 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/02/1982 |
| From: | Brey H PUBLIC SERVICE CO. OF COLORADO |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| P-82157, NUDOCS 8206080345 | |
| Download: ML20079G190 (2) | |
Text
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public Senice Company E" CcHeade 5909 East 38th Avenue, Denver, Colorado, 80207 k
June 2, 1982 Fort St. Vrain Unit No.1 P-82157 75 V 'lem Mr. Robert Clark, Chief Operating Reactor Branch Division of Licensing Office of Nuclear Reactor Regulations U. S. Nuclear Regulatory Commission Washington, DC 20555 Docket No. 50-267
Subject:
May 4, 1982 Telecon GAC/PSC/NRC Fuel Surveillance Program
Reference:
P-81322
Dear Mr. Clark:
The purpose of this letter is to document the telephone conversation held on May 4,1982 among the following:
Mike Tokar-(NRC), Mike Holmes (PSC), Dave Alberstein, Stan Stansfield, and Don Kowal -(GAC).
The subject of tiis conversation was PSC's previous written request to NRC for waiver of PSC's canmitment to perform a destructive post-irradiation examination of a Segment 2 surveillance element (Ref.
P-81322).
Mike Tokar had several questions about the amount of fuel kernel migration which might have occurred during the first two cycles and how well this migration is predicted by GAC.
GAC stated that:
1.
No kernel migration was observed during the destructive PIE of the Segment i surveillance el ement, and none was expected.
2.
The incremental exposure of the segment 2 surveillance element over the Segment 1 element is small.
PDR ADOCK8206080345 820602 05000267 P
________m
3.
The smallest kernel migration distance which can be detected by metallographic techniques is 3 or 4 microns.
4.
In the basis of Technical Specification SL 3.1, Core Safety Limit, it is stated that, for the total fuel lifetime in the.
core, migration of the fuel particle kernel with the most l
damaging tenperature history would be less than 20 microns.
5.
Variods analyses have been conducted wherein kernel migration distributions throughout the core were calculated.
The results of these analyses are consistent with the statement in the basis of SL 3.1.
6.
Thesc analyses indicate that kernel migration at the end of Cycle 2 is expected to be less than the 3 to 4 micron lower limit of detectibility.
If PSC can be of further assistance, or if you have any questions regarding this matter, please let us know.
Very truly yours, m
i H. L. Brey, Manager Nuclear Engineering Division HLB /JCS:pa 1
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