ML19317F880
| ML19317F880 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 10/06/1975 |
| From: | Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML19317F881 | List: |
| References | |
| NUDOCS 8002210611 | |
| Download: ML19317F880 (1) | |
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i SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830. Sacramento, Califomia 95813:-(916) 452-3211 L,J g
October 6, 1975 Mr. R. H. Engelken Director of Regulatory Operations Region V NRC Operations Office 1990 N. California Boulevard Walnut Creek Plaza, Suite 202 Walnut Creek, California 94596 Re: Operating License DPR-54 Docket No. 50-312 Unusual Event 75-6
Dear Mr. Engelken:
On July 15, 1975, the Sacramento Municipal Utility District submitted Unusual Event Report UE 75-6.
The subject of this report was the occurrence of brief spikes on the conductivity meter measuring effluent waste water that exceeded the Technical Specification limit
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for total dissolved solids in the effluent.
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V As a corrective measure to prevent recurrence of this event, we stated that the system would be desensitized to prevent over-reaction to increases in conductivity. Further review of the system-demonstrated that practicably this could not be accomplished and as such was not acceptable as a corrective measure. The waste water-effluent monitoring system is currently being rede,signe'd and' eqdipment for the new system has been ordered. The new design incorporates two conductivity sensing devices with associated recording and alarm systems and a " Total Dissolved Solids Times Gallons of Effluent" device in its monitoring functions.
It is felt that the installation of this system with itt new monitoring devices, which are better suited for our applications, will provide more accurate monitoring of dissolved solids in the was:e water effluent and prevent recurrence of the above referenced unusual event.
Respectfully,
. Mattimoe Assistant General Manager and Chief Engineer
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Enclosure i
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4 AM ELECTRIC SYSTEM S E RVIN G MORE THAN 600,000 IN THE HEART OF C A LIF 0 R N B A