ML19326B680

Nonroutine Nonradiological Environ Rept 50-313/75-34:on 750609,one Parameter Chemical Concentration Increased Across Plant Exceeding ETS Limits.Caused by Neutralizing Tank Draining Into Discharge Canal During Sampling

ML19326B680
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/19/1975
From:	ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19326B673	List: ML19326B671 ML19326B680
References
NUDOCS 8004170521
Download: ML19326B680 (3)

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1. Non-Routine, Non-Radiological Envinipmental Report No. 50-313/75-34

2. Report Date: June 19,1975 3. Occurrence Date: June 9, 1975 4.

Facility: Arkansas fluclear One-Unit l Russellville, Arkansas

5. Identification of Occurrence:

Chemical concentration of one parameter increased across the plant in

. excess of ETS limits.

6. Conditions Prior to Occurrence: ' ~

Steady-State Power X Reactor Power 2440 Mwth Hot Standby Net Output Snic Cold Shutdown Percent of Full Power 95 g Refueling Shutdown Load Changes During Routine Power Operation

(] Routine Startup Operation gNj Routine Shutdown Operation Other- (specify) t

7. Description of Occurrence:

Samples taken from the intake and discharge ccnals and at point 20 on June 9,1975, indicate that. chemical concentrations of ~six parameters increased across the plant in excess of ETS limits:

Unit Increase ETS Limit Conduc'tivity (intake vs. discharge)  % '8.4 10 Turbidity (intake vs. discharge)  % 21 10 pH (intake vs. discharge pH 0.6 0.5 Chloride (point 20 vs. discharge) mg/l 99 25 Ammonia (intake vs. discharge) mg/l 0.57 0.05

[' A;monia (point 20 vs. discnarge) mg/l 0.56 0.05 C _n ^

W ' ,< _L. -m 1- ..

n..m - -i 8 0 0417g 7g pi"u- 7

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f N ,,/. ;Non-Routine, !Non-Radiological Envirm ntal Report No. 50-313/75-34 4

8. Desigr.4 tion of Apparent Cause of Occurrence:

Design ~ Procedure L Manufacture Unusual Service Condition Including Environmental Installation /

Construction Component Failure Operator Other (specify) i Neutralizing tank draining into discharge canal at time of sampling.

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9. Analysis of Occurrence:

Samples were taken when the neutralizing tank was being drained into the discharge canal. Four circulating water pumps were in operation providing approiimately 750,000 gallons per minute dilution flow.

No other liquid releases'were in progress at time of sampling. The ,

neutralizing tank contains water impurities remaining after regenerat-ing condensate demineralizers.

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a Non-Routino, Non-Radiological Environmental Report No. 50-313/75-34

10. Corrective t.ction:

We are reviewing our ETS chemical limits with the Arkansas Department of Pollution Control and Ecology. It has been determined that there is no basis .for many of our ETS chemical discharge limits and that our Tech- -

nical Specification water sampling program does not verify that wa are or are not meeting the conditions of our permits to dischsarge issued by the-Arkansas Pollution Control and Ecology Commission or the EPA.

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t 11. Failure Data:

The ciircumstances of this report are similar to those reported in Non-Routine, Non-Radiological Reports No. 50-313/75-25 through 50-313/75-33. -

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