ML19326C593
| ML19326C593 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 06/09/1975 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML16341B322 | List: |
| References | |
| NUDOCS 8004230698 | |
| Download: ML19326C593 (3) | |
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d L Non-Routine, Non-Radiological En @ o. mental ^ Report No.
50-313/75-32 2.
Report Date:
June 9, 19,75 3.
Occurrence Date:
June 6, 1975 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Chemical concentration of ammonia in circulating water increased across the plant in excess of Environmental Technical Specification limits.
- 6.. Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2440 MWth Hot Standby Net Output MWe Cold Shutdown Percent of Full Power 95 %
l Refueling Shutdown Load Changes During Routine i
Power Operation Routine Startup, Operation 1
Routine Shutdown Operation Other (specify) 11 7.
Description of Occurrence:
Comparison of lab analysis of water samples taken from th discharge canal, intake canal and point 20 indicate that ammonia concentration increased across the plant'in excess of ETS limit:
Parameter Units Increase ETS Limit Ammonia, intake vs. discharge mg/l 0.16 0.05 Ammonia, point 20 vs. discharge mg/l 0.09 0.05 Concentrations of ammonia determined to be present are as follows:
O Point 20 - 0.08 mg/1; intake canal - 0.01 mg/1; discharge can:! -
0.17 mg/l 4
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r-Non-Routine, Non-Radiological Environtxntal Report No.
50-313/75-32 8.
Designation of Apparent Cause of Occurrence:
Design Procedure 4
M nufactur-Unusual Service Condition
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Including Environmental Installation /
Construction Component Failure i
Operator Other (specify)
Neutralizing tank draining into discharge canal at time of.,ampling.
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Analysis of Occurrence:
Samples were taken when the neutralizing tank was being drained into the discharge canal. Four cire'i!ating water pumps were in operation, provid-ing approximately 750,000 gpm dilution flow. The neutralizing tank con-tains water impurities remaining after regenerating condensate demineralizers.
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Non-Ikoutine,Non-RadiologicalEnvironmentalReportNo. 50-313/75-32 L
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Corrective Action:
We are reviewing our ETS chemical limits with the Arkansas Department of j
Pollution Control and Ecology..It has been determined that there is no basis for many of our ETS chemical discharge limits and that our water sampling and testing program does not verify that we are meeting or are not meeting the conditions of our permit to discharge into the Arkansas River or the conditions of the Arkansas Water Quality Standards, Regula-J tion No. 2 (Tabic 2-3 in ETS).
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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 50-313/75-31.
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