ML20137J959
| ML20137J959 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 07/11/1985 |
| From: | Musolf P NORTHERN STATES POWER CO. |
| To: | NRC OFFICE OF RESOURCE MANAGEMENT (ORM) |
| Shared Package | |
| ML20137J962 | List: |
| References | |
| NUDOCS 8509120031 | |
| Download: ML20137J959 (1) | |
Text
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Northem States Power Company 1
j 414 Nicollet Mall Minneapoks. Minnesota 55401 Telephone (612) 330-5500 July 11, 1985 Director, Office of Resource Management U S Nuclear Regulatory Commission Washington, DC 20555 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Monthly Operating Report June, 1985 Attached are twelve copies of the Monthly Operating Report for June 2 '.905 for the Monticello Nuclear Generating Plant.
An apparent discrepancy between the NRC gray book values for cumulative thermal MWH and the fuel exposure histories from the process computer has been recently discovered. The gray book monthly values for critical and on-line tima, MWH(th), ET(e)-gross and MWH(e)-net were entered into a program to check the cumulative values. A significant error was discovered for December, 1974 in the MWH(th).
As a result of the checking, several arithmetic errors were discovered and the following corrections were made:
Cumulative critical time was increased by 170.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Cumulative on-line time was decreased by 16.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> Cumulative MWh(thermal) was decreased by 8039268 ET(th)
Cumulative ET(electric)-net was increased by 10170 EM(e)
Cumulative MWH(e)-gross is correct.
Since the reporting was computerized in 1978, no values after that were checked. Also, the other cumulative values (forced outage, etc.) were not checked.
The monthly values were not recalculated, just transcribed from the monthly reports.
The June, 1985 monthly report has been changed to reflect the above new cumulative values.
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[gDavidMusolf Manager of Nuclear Support Services DMM/MMV/ dab cc:
Regional Administrator-III, NRC NRR Project Manager, NRC NRC Resident Inspector MPCA 8509120031 850711 Attn: J W Ferman PDR ADOCK 05000263 k
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PDR Attachment 2