05000312/LER-1981-036, Forwards LER 81-036/04T-0.Detailed Event Analysis Submitted

Forwards LER 81-036/04T-0.Detailed Event Analysis Submitted

ML20030B290
Person / Time
Site:	Rancho Seco
Issue date:	07/23/1981
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20030B291	List: 05000312/LER-1981-036, Forwards LER 81-036/04T-0.Detailed Event Analysis Submitted 05000312/LER-1981-036-04, /04T-0:on 810713,monthly Review of Plant Effluent Records Revealed 12 Instances of Plant Effluent Ph Exceeding Allowable Levels.Caused by Ongoing Work on Instrumentation, Poor Sampling Techniques & Leaking Valves
References
NUDOCS 8108060292
Download: ML20030B290 (1)

LER-1981-036, Forwards LER 81-036/04T-0.Detailed Event Analysis Submitted

Event date:
Report date:
3121981036R00 - NRC Website

text

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esuun SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452-3211 x

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July 23, 1981

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In accordance with Technical Specification Appen' ix B, Sections 2.4 and 5.6.2.C, the Sacramento Municipal Utility District hereby submits a ten day report of Reportable Occurrence 81-36.

Mr. H. North of the NRC was notified verbally of the occurrence by Mr. F. Kellie.

On July 13, a review of plant effluent records for June revealed twelve instances.of up to one hour in duration, when the plant effluent pH exceeded allowable levels.

Most apparent-violations occurred while work was being done on the instrumentation, leading to spurious indications.

Several violations occurred during set-up of the dilution necessary to bring the pH within specification.

Several were also due to high pH in the dilution water and poor sampling techniques. One was due to a' leaky valve on a chemical storage tank drain.

The leaking valve was isolated and is being repaired. The possibility of adding an automatic recirculation system to the plant effluent outlet is being investigated.

No plant transient or power reductions were associated with these events.

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ohn J. Mattimoe Assistant General Manager and Chief Engineer cc:

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