ML20205G476
| ML20205G476 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 03/24/1987 |
| From: | Andrews R OMAHA PUBLIC POWER DISTRICT |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| LIC-87-130, NUDOCS 8703310465 | |
| Download: ML20205G476 (2) | |
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Omaha Public Power District 1623 Harney Omaha Nebraska 68102 402/536 4000 March 24, 1987 LIC-87-130 Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C.
20555
References:
1)
Docket No. 50-285 2)
Letter from NRC (W. A. Paulson) to OPPD (R. L. Andrews) dated February 12, 1987.
Gentlemen:
SUBJECT:
Internals Vibration Monitoring System for the Thermal Shield Support System - Fort Calhoun Station, Unit No. 1 The Omaha Public Power District (0 PPD) will submit additional information on OPPD's Internals Vibration Monitoring (IVM) system to the NRC as requested in Section 5.0 of the Safety Evaluation transmitted by Reference 2.
The additional information will consist of:
data on the IVM system, including analysis techniques and data interpretation.
supplying IVM threshold levels which will be used to indicate the initiation of the slow degradation process of the Core Support Barrel / Thermal Shield support structure.
The supplied threshold levels will include an evaluation of the potential errors in the system's detectors, instrumentation, and indication subsystems.
providing the intended inspection and/or corrective action program that will be initiated by 0 PPD when the above threshold levels are exceeded.
providing a description of the methods that are used by 0 PPD to accomplish the IVM data collection, analysis, interpretation, and any required corrective actions.
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.a U.S. NRC March 24, 1987 Page 2 Reference 2 requested that the additional information be submitted within '6 months of the date of the letter. Accordingly, OPPD can provide the above stated information to the NRC by August 12, 1987.
R. L. Andrews Division Manager i
Nuclear Production RLA/rh c:
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
20036 Mr. W. A. Paulson, NRC Project Manager Mr. P. H. Harrell, NRC Senior Resident Inspector i
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