ML19309D994

Nonroutine Nonradiological Environ Rept 50-313/75-44:on 750813,chemical Concentration of Three Parameters Increased Across Plant Exceeding ETS Limits.Caused by Neutralizing Tank Draining Into Discharge Flume During Sampling

ML19309D994
Person / Time
Site:	Arkansas Nuclear
Issue date:	08/18/1975
From:	ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19309D991	List: ML19309D990 ML19309D994
References
NUDOCS 8004110775
Download: ML19309D994 (3)

Text

. .

i g

i 1.

j Non-Rottrine, Non-Radiological Environmental Report No. 50-313/75-44

2. Report Date: August 18, 1975 3. Occurrence Date: August 13, 1975

4. Facility: Arkansas Nuclear One-Unit 1 Russellville, Arkansas a

5. Identification of Occurrence:

Chemical concentration of three parameters increased across the plant in excess of Environmental Technical Specification limits.

6. Conditions Prior to Occurrence: ~~

Steady-State Power X Reactor Power 2363 MNth Hot Standby Net Output MWe Cold Shutdown Percent of Full Power  %

Refueling Shutdown Load Changes During Routine Power Operation Routine Startup

( ]d

_gs/ Operation s

Routine Shutdown Operation Other (specify) .

I l

'l l

7. Description of Occurrence: '

l Samples taken from the intake and discharge canals and at point 20 on August 12, 1975, indicate that chemical concentrations 'of 3 parameters l

increased across the plant in excess of ETS limits:

Parameter Units Increase ETS Limit Sodium Nitrite, Point 20 vs. Discharge mg/l 0.026 0.005

. Turbidity, Intake vs. Discharge  % 42.8 10.0 m Ammonia, Intake vs. Discharge mg/l 0.08 0.05

\ ./

/

8004110 N >

l

-s s

m

, Non-Routine, Non-Radiological Environmental Report No. 50-313/75-44

8. Designation of Apparent Cause of Occurrence:

. Design Procedure Manufacture Unusual Service Condition Including Environmental Installation /

Construction Component Failure Operator -

Other (specify) X Neutralizing tank draining into discharge fiume at time of sampling.

Arkansas River (discharge) more turbid than Illinois Bayou (intake).

9. Analysis of Occurrence:

The neutralizing tank contains water impurities remaining after regenerating condensate demineralizers and the plant makeup water demineralizers was being drained into the discharge flume when samples were taken. Turbid conditions of the Arkansas River are beyond control of ANO operation. ,

~;

e

_ _ - _ - -__g ._w,

• l

s. .

) -

[

I t

Non-Routine, Non-Radiological Environental Report,No. 50-313/75-44 i

i

10. Corrective Action:

i Revisions to ETS concerning chemical discharges have been prepared and

) submitted to the NRC for approval.

f l

l i

i f

J I

i i ,

i 1

! 11. Failure Data:

1

! The circumstances of this report are similar to those reported in Non-Routine, Non-Radiological Environmental Reports No. 50-313/75-25 through 50-313/75-43. -

5 a,

1 .

i I ~; :

1 l

4 -

i I

n

• e 4

e

.. . - - _ _ ,_,_,,,__,,_7_ _ _ _ . . - _ _ ,,m,,- , . , , _r, , mm7_,,_y . _ , , ,_,__.y_, .., , , , _ _,,__.. . , __m,_., , _ , _ _-, , , , , , _ , , _. - - - _ . , - , _ ,,,y