ML20042F950
| ML20042F950 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 05/08/1990 |
| From: | Padovan L NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Rosenthal J NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| Shared Package | |
| ML20042F951 | List: |
| References | |
| TASK-AE, TASK-T90-06, TASK-T90-6 AEOD-T90-06, AEOD-T90-6, NUDOCS 9005100213 | |
| Download: ML20042F950 (1) | |
Text
MAY 8 1990 i
- HEMORANDUM FOR:
JCck E. Ro3Onth21, Chiof ROOctor Op3rction3' Analysis Branch Divicion of Safoty Frogrcm3 Office for Analysis and Evaluation of Operational Data FROM:
L. Mark Padovan, Reactor Systems Engineer Reactor Systems Section H and B&W Reactor Operations Analysis Branch Office for Analysis and Evaluation of Operational Data
SUBJECT:
AQUATIC LIFE IN EMERGENCY COOLING PONDS
~
Enclosed is..a Technical Review Report on the vulnerability of
- - emergency cooling ponds to uncontrolled growth of aquatic life that would affect the capability of the ponds to provide adequate heat sinks during postulated accident conditions.
This study was
. initiated as a result of findings from a December 1989, NRC Diagnostic Evaluation Team inspection at Arkansas Nuclear One 4
(ANO), Units 1 and 2.
The issue concerned the presence of fish and other aquatic life in emergency cooling ponds, which was not accounted for in the plant design basis.
The fish population in the emergency cooling pond at ANO was neither monitor +ed nor controlled.
During a postulated accident which would require use of the emergency cooling pond as the ultimate heat sink, the temperature of the pond could increase enough to kill fish and other aquatic life, potentially causing fouling of.the pump intake screens and subsequent loss of emergency cooling capability.
This technical review was initiated to assess the generic applicability of this concern.
Based on a review of data obtained, the study concludes emergency cooling ponds at other plants are not susceptible to unforeseen blockage of pump intakes due to fish kills.
Accordingly, no further AEOD action in this regard is warranted at this time.
Qdginal S100d DY 0
L. Mark Padovan, Reactor Systems Engineer Reactor Systems Section H and B&W, Reactor Operations Analysis Branch Office for Analysis and Evaluation of Operational Data
Enclosure:
As stated cc: HFaulker, IP - JWheelock, INPO - DQueener, NOAC Distributiont
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