ML19319E380
| ML19319E380 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/05/1975 |
| From: | ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E371 | List: |
| References | |
| NUDOCS 8004100671 | |
| Download: ML19319E380 (3) | |
Text
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Non-Routine, Non-Radiological Environmental Report No.
50-313/75-58 a
2.
Report Date: December 5, 1975 3.
Occurrence Date: November 25, 1975 4.
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Chemical concentration of Sodium Nitrite, chlorides, ard ammonia in condenser circulating water increased across plant in (xcess of Environ-mental Technical Specification limits.
6.
Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2530 MWth Hot Standby Net Output 836 MWe Cold Shutdown Percent of Full Power 99 %
Refueling Shutdown Load Changes During Routine s
Power Operation
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Routine Startup
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Operation i
Routine Shutdown Operation Other (specify) i, I
7.
Description of Occurrence:
~2 Samples were taken from the intake and discharge canals and at point 20 on 11/24/75.
Lab analysis indicated the following parameters in excess of ETS limits:
Parameter Units Increase ETS Limit Sodium Nitrite (intake vs. discharge)'
mg/l 0.092 0.005
' Chloride (point 20 vs. discharge) mg/l 32 25 Ammonia (intake vs. discharge) mg/l 0.07 0.05 Ammonia (point 20 vs. discharge) mg/l 0.10 0.05 v
8004100 h[
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Non-Routine, Non-Radiological Environmental Report No.
50-313/75 8.
Designation of Apparent Cause of Occurrence:
Design Procedure 1
Manufacture
' Unusual Service Condition Including Environmeital Installation /
Construction Component Failure Operator i
Other (specify)
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Neutralizing tank draining into discharge flume at tire of sampling.
9.
Analysis of Occurrence:
The neutralizing tank, which contains impurities remairing after regen-eration of the condensate demineralizers and plant makeup water demin-erali:ers, was being dumped into the discharge fiume when samples were taken. No other liquid releases were in progress at time of sampling.
Four circulating water pumps were in operation providing approximately 764,000 gpm dilution flow.
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Non-Routine, Non-Radiological Environmental Report No.
50-313/75-58 10.
Corrective Action:
3 :-
Revised Environmental Technical Specifications have be(n submitted to the NRC and are currently under review.
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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-:113/75-28 through 50-313/75-57.
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