ML19224C590
| ML19224C590 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Daltroff S PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 7907030053 | |
| Download: ML19224C590 (1) | |
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< :a og a usr re:.us< /- -,:c May 29, 1979 Docket Nos. 50-277 50-278 Philadelphia Electric Company ATTM:
Mr. S. L. Dal troff Vice President Electric Production 2301 Market Street Philadelphia, Pennsylvania 19101 Gentlemen:
This Information ?!otice is provided as an early no*.ification of a possibly significant matter.
It is expected that recipients will review the information for possible applicability to their facilities.
No specific act@cn cr resconse is requested at this time.
If further NRC evaluations :o indicate, an IE Cir-cular or Bulletin will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
S'ncerely, e
,/
hhf de
,S.
Boyce H. Grier Director
Enclosures:
1.
IE Information Notice No. 79-13 w/ enclosures 2.
List of Information Notices Issued in 1979 cc w/encls:
W. T. Ullrich, Station Superintendent Troy B. Conner, Jr., Esquire Eugene J. Bradley, Esquire Raymond L. Hovis, Esquire Warren Rich, Esquire 272 32s 7907030053'
UNITED STATES NUCLEAR REGULATORY COMMISSION CFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Information Notice No. 79-13 Date:
May 29, 1979 Page 1 of 4 INDICATION OF LOW WATER LEVEL IN THE OYSTER CREEK REACTOR Sunmary A loss of feedwater transient at the Oyster Creek facility on May 2,1979, resulted in a significant reduction in water ir.ventory within the ieactor core shroud area as measured by one set of water level u struments (triple low level),
while the remaining level instruments, sensing fra,. the reactor annulus area indicated water levels above any protective feature setpoint (Fioure 1). The water level within the core shroud ared was reduced below the " triple low level" setpoint of 4-feet, 8-inche; above the top of the fuel.
Subsequent analysis by the licensee has determined o ;t the m'nimum collapsed water level (solid, without steam voids) over the top of the tuel 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 193) 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" ova top of fuel) reactor water level 1026 nsig reactor pressure 7.1x10}#/hrfeedflow 14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core Ap Equipment Out of Service (005)
"D" recirc pump 005 due to seal coole "B" startup transformer 00S for inspe DUPLICATE DOCUMENT Entire document previously entered into system under:
996(oOf0}(8 ANO No. of pages:
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