ML19319E517

Nonroutine Nonradiological Environ Rept 50-313/75-38:on 750623,condenser Circulating Water Chloride Concentration Increased Across Plant Exceeding ETS Limits.Caused by Neutralizing Tank Draining Into Discharge Flume

ML19319E517
Person / Time
Site:	Arkansas Nuclear
Issue date:	07/01/1975
From:	ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19319E515	List: ML19319E514 ML19319E517
References
NUDOCS 8004110787
Download: ML19319E517 (3)

Text

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1. Non-Routine, Non-Radiological Environmental Report No. ,

50-313/75-38 l

2. Report Date: = July 1, 1975 3. Occurrence Dato: June 23, 1975

4. Facility

Arkansas Nuclear One-Unit 1 '

Russellville, Arkansas

5. Identification of Occurrence: '

l Chloride concentra-tion in condenser circulating water increased across  !

the plant in excess of ETS limits.

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6. Conditions Prior to Occurrence:

Steady-State Power X Reactor Power 2054 MWth i

Hot Standby _ Net Output 660 MWe  !

3 Cold Shutdown __

Percent of Full Power 80 %

Refueling Shutdown , Load Changes During Routine i

I Power Operation

- ' Routine Startup i -

Operation Routine Shutdown Operation Other (specify) s 4

7. D_e_scription of Occurrence: '

Samples taken' from the discharge canal and at point 20 on June 23, 1975 .

indicate that chloride concentration in the discharge canal was higher than chloride' concentration at point 20 by 65 mg/1. ETS limit is e 25 mg/1. - -

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O Non-Routine, Non-Radiological Environmental Report No. 50-313/75-38

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8. Designation of Apparent Cause of Occurrence:

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. Design Procedure Manufacture Unusual Service Condition Including Environmental Installation / .

Construction Component Failure '

Operator l

Other (specify) i X

emp l Neutralizing tank was draining in the discharge flume at time of sampling.

9. Analysis of Occurrence:

The neutralizing tank, which contains water impurities remaining after

-regenerating condensate demineralizers and plant. makeup water deminera-

' lizers, was being drained into the discharge fiume when samples were taken. No other liquid releases were in progress at time of sampling. s 1

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T' j Non-Routine, Non-Radiological Environmental Report No. 50-313/75-38

10. Corrective Action:

We are reviewing our ETS chemical limits with the Arkansas Department of Pollution Control and Ecology. It has been determined that there is no i . basis- for many of our ETS. chemical discharge limits and that our water sampling and testing program does not verify that we are or are not meet-ing the conditions of our permits to discharge issued by the Arkansas Department of Pollution Control.and' Ecology or the EPA.

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, 11. Failure Data:

The circumstances of this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No. 50-313/75-25 through 50-313/75-37.

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