ML19344B552
| ML19344B552 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/10/1980 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEB-79-14, NUDOCS 8010210448 | |
| Download: ML19344B552 (3) | |
Text
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-0 YU2 SACRAMENTO MUNICIPAL. UTILITY DISTRICT O 6201 s. street, Box 15830, sacramento, Califomia 95813; (916) 452-3211 i_
October 10, 1983 i
Mr. R. H. Engelken, Director l
Region V, Office of Inspection
.and Enforcement U. S. Nuclear Regulatory Commission l
Suite 202, Walnut Creek Plaza l
1990 North California Boulevard-l Walnut' Creek, CA. 94596 i
Docket 50-312 Rancho Seco Nuclear Generating Station, Unit 1 IE Bulletin 79-14 l
Dear Mr. Engelken:
The purpose of this letter is to provide some additional information on
-IE Bulletin 79-14. This information was requested by one of the Region V l
inspectors during a recent visit to Rancho Seco, so that he could close i
out this bulletin. Two items require further clarification:
1.
In our August 1,1980 submittal, line number 21501-24"-CA (stress problem 60 A, B and C) was dispositioned "Not-inspected-high radiation area". Further-examination of the inspection package for this line showed j_
that it was not totally inaccessible because of high radiation.
The accessi-l ble portion was indeed inspected and no discrepancies with the seismic ana-l lysis were found.
i a subsequent walkdown has been performed and pictures were taken to confirm I
the as-built isometrics. A revised sunmary sheet is attached, showing the final disposition for stress problem 60. A, B and C.
l 2.
The walkdown on stress problem 73 was done using the stress isometric instead of the as-built isometric and several flanges were missed in the in-spection. To make sure this problem was not widespread, ten other stress problems were identified where the stress isometric was used for the walkdown -
instead of the as-built isometric.
Each of these was given a second walkdown usinc the as-built isonetric. No discrepancies were noted that changed. the original disposition.
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lPage 2 October 10, 1980
.Should you-have any questions, please contact Larry Smith at
.(916)452-3211._
Sincerely yours, ohn J. Mattimoe Assistant General Manager and Chief Engineer-Enclosure
. cc2' Director of' Nuclear Reactor Regulation Attn:- Mr. Robert W. Reid, Chief Operating Reactors, Branch 4 U.S. Nuclear Regulatory. Commission Washington, D.C.
20555 Director Office of Inspection-and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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