ML19339B753
| ML19339B753 | |
| 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 8011100017 | |
| Download: ML19339B753 (3) | |
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', SMUE3 SACRAMENTO MUNICirAL UTILITY DISTRICT E) C201 s street Box 15830. sacramento, California 95813; (916) 452-3211 4 7 M Ff;s O
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October 10, 1983 L
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Y Mr. R. H. Encelken, Director Region V, Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Suite 202, Walnut Creek Plaza 1990 North California Boulevard Walnut Creek, CA. 94596 Docket 50-312 Rancho Seco huclear Generating Station, Unit 1 IE Bulletin 79-14
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 inspectors during a recent visit to Rancho Seco, so that he could close out this bulletin.
Two items require further clarification:
1.
In our August 1,1930 submittal, line nurrber 21501-24"-CA (stress problem 60 A, B and C) was dispositioned "Not inspected-high radiation area".
Further examination of the inspection packace for this line showed that it was not totally inaccessible because of high radiation.
The accessi-ble portion was indeed inspected and no discrepancies with the seismic ana-lysis were found.
A subsequent walkdown has been performed and pictures were taken to confirra the as-buil t isometrics.
A revised sunmary sheet is attached, showing the final disposition for stress orablem 60 A, B and C.
2.
The walkdo,m on stress problem 73 was done using the stress isometric instead of the as-built isonetric and several flanges were nissed 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 using the as-built isormtric.
No discrepancies were noted that changed the original disposition.
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Mr. R. H. Engelken Page 2 October 10, 1980
- Should you have any questions, please contact Larry Smith at (916) 452-3211.
Sincerely yours, hY sjohn J. Mattirroe Assis tant General Manager and Chief Engineer Enclosure cc:
Director of Nuclear Reactor Regulation Attn:
Mr. Robert W. Reid, Chief Operatino Reactors, Branch 4 U.S. Iluclear Regulatory Commission Washington, D.C.
20555 Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555
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