ML19263E536
| ML19263E536 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/29/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Johari Moore SOUTHERN CALIFORNIA EDISON CO. |
| References | |
| NUDOCS 7906200056 | |
| Download: ML19263E536 (1) | |
Text
f'p u ng, lQ UNtTLD STAT ES NUCLi~ AR HEGULAl'ORY COMMISSION g 3.,4 p
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liay 29,1979 Docket lios.60-205 50-361 50-362 Southern California Edison Company P. O. Box 000 2244 Walnut Grove Avenue Rosemead, California 91770 Attention:
Mr. Jack B. Moore Vice President Gentlemen:
This Information Motice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilities.
flo specific action or response is requested at this time.
If further !!RC evaluations so indicate, an IE Circular or Bulletin will be issued to recom.wnd or request specific licensee actions.
If you have questions regarding the matter, please contact the Director of the appropriate !!RC Regional Office.
Sincerely, R.) f.
Director
/
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Enclosure:
IE Information Notice flo. 79-13 cc w/ enclosures:
2288 242 J. M. Curran, SCE J. T. Head, SCE J. H. Drake, SCE 79062000 %
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF IIISPECTI0il AtlD EilFORCEf!Elli WASHIllGTON, D.C.
20555 May 29, 1979 IE Information !!otice flo. 79-13 INDICATION OF LOW WATER LEVEL If1 THE OYSTER CREEK REACTOR Summary A loss of feedwater transient at the Oyster Creek facility on flay 2,1979, resulted in a significant reduction in water inventory within the reactor core shroud area as measured by one set of water level instruments (triple low level), while the remaining level instruments, sensing from the reactor annulus area indicated water levels above any protective feature setpoint (Figure 1).
The water level within the core shroud area was reduced below the " triple low level" setpoint of 4-feet, 8-inches above the top of the fuel.
Subsequent analysis by the licensee has determined that the minimum collapsed water level (solid, without steam voids) over the top of the fuel was 1 to 1-1/2 feet.
Coolant sample analyses and offgas release rates indicate that no fuel damage occurred.
General Oyster Creek is a non-jet pump BWR with licensed power of 1930 MWt.
The plant was first made critical flay 3,1959.
Status Before Transient Operating at near full power with the main parameters at levels as follows:
1895 MWt power level 79" Yarway (13'4" over top of fuel) reactor water level 1020pgigreactorpressure 7.1x10 #/hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) ygg g}
12 psid core 4 p Equipment Out of Service (005).
"D" recirc pump 005 due to "B" startup transformer 00S DUPLICATE DOCUMENT Entire document previously entered into system under:
((hhk b ANO N o.
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