ML19326D068
| ML19326D068 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/26/1975 |
| From: | Pettit A ARKANSAS POWER & LIGHT CO. |
| To: | Howard E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 14386, NUDOCS 8004300694 | |
| Download: ML19326D068 (2) | |
Text
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'e H E L PIN G Ultit O A H k A N t* A H ARK ANS AS POWER & LIGHT COMPANY 72203 1501) 371-4000 97H G LOUISt AN A BT AEETS t.lT TLE AOCK. A AK ANSAS Decembe
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Mr. E. Morris floward, Director u s cw Office of Inspection G Enforcem
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Ri;gion IV U. S. Nuclear Regulatory Commission e - ~
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Subject:
Arkansas Power G Light Cc,mpany A
Arkansas Nuclear One-Unit 1 Docket No. 50-313 License No. DPR-51 Non-Routine, Non-Radiological Environmental Report No. 50-313/75
Dear Mr. Iloward:
On December 16, 1975 we reported to you an environmental occurrence at Arkansas Nuclear One-Unit 1 involving the increase of several chemical parameters across the plant in excess of Environmental Technical Specification limits.
Attached find our report in accordance with Environmental Technical Specification 5.6.2.
Very truly yours, t
Uh IHIS DOCUMENT CONTA!NS Arch P. Pettit Senior Vice President P00R QUAUTY PAGES APP:ay Attachment cc:
Mr. D. F. Knuth, Director Mr. W. D. MacDonald, Director Office of Inspection G Enforcement Office of Management Information G U. S. Nuclear Regulatory Consnission Program Control I
Washington, D. C.
20555 U. S. Nucicar Regulatory Commission Washington, D. C.
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14386-8 FILE: I MRonMrDi FROM: Arkansas Power & Light Co. DATE OF DOC DATE REC'D LTR TWX RPT OTHER
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' 20 50-313 DESCRIPTION:
ENCLOSURES:
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Letter trans the following Environmental Report # 75-61, on 12-16-75, Concerning the. increase of several chemical l
parameters across the plant.......
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Non-Routine, Non-Radiological Environmental Report No. 50-313/75-61 2.
Report Date: 12-26-75 3.
Occurrence Date: 12-16-75 4.
Facility: Arkansas Nuclear One-Unit 1
-Russellville, Arkansas 5.
Identification of Occurrence: Chemical concentration of two (2) parameters increased across the plant in excess of Environmental Technical Specification limits.
6.
Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2542 MWth Hot Standby Net Output 836 MWe Cold Shutdown Percent of Full Power 99 **
Refueling Shutdown Load Changes During Routine Power ~ Operation Routine Startup c
Operation Routine Shutdown Operation Other (specify) 7.
Description of Occurrence: Samples taken from the intake and discharge canals and at point 20 on 12-15-75 indicate that the chemical concentra-tions of two (2) parameters increased across the plant in excess of ETS limits as follows:
Parameters Units Increase ETS limit Conductivity (intake vs. discharge) 10.8 10 Chlorides (point 20 vs. discharge) mg/l 70 25 Y O9/00f?(
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i Non-Routine, Non-Radiological Environmental Report No. 50-313/75-61 8.
Designation of Apparent 'ause of Occurrence:
Design Procedure Manufacture Unusual Service Condition Including Environmental Installation /
Construction
' Component Failure Operator Other (specify)
X Neutralizing tank was draining into the discharge fiume at time of sampling.
e 9.
Analysis of Occurrence:
The neutralizing tak which contains water imputities remaining after regenerating condensate demineralizers and plant makeup water demineral-izers was being drained into the discharge fiume when samples were taken. No other liquid releases were in progress at time of sampling.
Four circulating water pumps were running providing approximately 750,000 gpm dilution flow.
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'Non-Routine, Non-Ra*iological Environmental Report No. 50-313/75-61 10.
Corrective Action:
Revisions to Environmental Technical Specifications concerning chemical discharges have been prepared and submitted to the NRC for approval, d
11.
Failure Data:
The circumstances of this report are similar to those. reported in
.Non-Routine, Non-Radiological Environmental Reports No. 50-313/75-28 through 50-313/75-60.
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