ML20216J017
| ML20216J017 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/21/1982 |
| From: | Wolf T NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Michelson C NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| Shared Package | |
| ML20216J020 | List: |
| References | |
| AEOD-E244, NUDOCS 9709170138 | |
| Download: ML20216J017 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION q
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AE0D/E244 MEMORANDUM FOR:
Carlyle Michelson, Of rector..
gg Office for Analysis and Eva15tiET 20 of Operational Data y
tigt stot.'tSTED IHROUGH:
Karl V. Seyfrit Chief
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Reactor Operations Analysis Branch Office for Analysis and Evaluation Agtf of Operational Data FROM:
Thomas R. Wolf Reactor Systems 4 Reactor Operations Analysis Branch Office for Analysis and Evaluation of Operational Data
SUBJECT:
ENGINEERING EVALVATION REPORT - LOSS OF RESIDUAL HEAT REMOVAL SYSTEM EVENT AT PILGRIM NUCLEAR POWER STATION.. DECEMBER 21, 1981
_ Enclosed is my evaluation of a loss of residual heat removal (RHR) cooling
' event which occurred at Pilgrim on December 21, 1981.
In this instance RHR cooling flow was lost while a system pump was operating. This condition went unrecognized for almost five hours. The consequences were minimal sicce the plant was in the very late stages of an extended refuel,ing outage.
I believe the most important feature of this event was the failure of the operators in two shifts to recognize this loss is serious.
However, even when considering this fact, the overall event does not appear to meet the criteria necessary to classify this event as an abnormal occurrence.
It does seem,' though, to be a good candidate for " Power Reactor Events."
Also, it serves to reinforce the recommendations put forth in IE Circular 81-11 " Inadequate Decay Heat Removal During Reactor Shutdown" '(issued July 24,1981.)
T.Aewtw 16. Et]
Thomas R. Wolf Reactor Systems 4 Reactor Operations Analysis Branch 9709170138 021021 PDR ADOCK 05000293 Office for Analysis and Evaluation f
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Enclosure:
As stated a4'"4 cc w/ enclosures:
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S By i ROAB D. Okrent, ACRS M. t.1-ZeitawydROAB S. Rosen, INP0 E. Brown, ROA d' M
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