ML19263E532
| ML19263E532 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 05/29/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| NUDOCS 7906200049 | |
| Download: ML19263E532 (1) | |
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WALfJU T CflEE K, Cf.LIFO!;ill A Ot. LOG iday 29, 1979 Docket !!os. 50-528 50-529 50-530 Arizona Public Service Company P. O. Box 21666 Phoenix, Arizona 85036 Attention:
fir. E. E. Van Brunt, Jr.
Vice President, Construction Projects Gentlemen:
This Information Notice is provided as an early notification of a possibly significant uatter.
It is expected that recipients will review the information for possible applicability to their facilities.
flo specific action er response is requested at this time.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recomend or request specific licensee actions.
If you have questions regarding the raatter, please contact the Director of the appropriate flRC Regional Office.
Sincerely, 7
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irector
Enclosure:
IE Inforiaation liotice No. 79-13 cc w/ enclosures:
F. W. Hartley, APS 288 236 79062000%
s V1ITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION Arid ENFORCEMENT WASHINGTON, D.C.
20555 May 29, 1979 IE Information Notice No. 79-13 INDICATION OF LOW UATER LEVEL IN THE OYSTER CREEK REACTOR Summary A loss of feedwater transient at the Oyster Creek facility on May 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 May 3, 1969.
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 5!/nr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps)gg ]J 12 psid core 4 p Equipment Out of Service (DOS)_ "D" recirc pump 00S due to se "B" startup transformer 005 f DUPLICATE DOCUMENT Entire document previously entered into system under: ,k.-6 f)d b ANO - r[ [ f No. of pages: ..}}