ML19263E569
| ML19263E569 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point, Palisades File:Consumers Energy icon.png |
| Issue date: | 05/29/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Dewitt R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 7906200103 | |
| Download: ML19263E569 (1) | |
Text
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./g coca ettva. itusois soin MAY 2 91979 Docket No. 50-155 Docket No. 50-255 Consumers Power Company ATTN:
Mr. R. B. DeWitt Manager of Nuclear Plant Operations 212 West Michigan Avenue Jackson, MI 49201 Gentlemen:
This Information Notice 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.
No specific action or response is requested at this time.
If further NRC evaluations so indicate, an IE Circular or Bulletin will be issued to recommend or request specific licensee actions.
If you have questions regarding this matter, % ease contact the Director of this office.
Sincu ely, b
k James G. Keppler Director
Enclosure:
IE Information Notice No. 79-13 cc w/ encl:
Mr. C. J. Hartman, Local PDR Plant Superintendent NSIC Mr. J. G. Lewis, Plant TIC Superintendent Ronald Callen, Michigan Public Central Files Service Commission Director, NRR/DPM Anthony Roisman, Esq.,
Director, NRR/ DOR Attorney PDR Myron M. Cherry, Chicago 2288 269 79062001o3
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U.S. ' NUCLEAR REGL'LATORY COMMISSION
-Y-0FFICE OF INSPECTION AND ENFORCEMENT REGION III May 29, 1979 IE Information Notice No. 79-13 INDICATION OF LOW WATER LEVEL IN THE OYSTER CREEK REACTOR Su==ary 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 r.inimum collapsed water level (solid, without steam voids) over the top of the fuel was I to 1-1/2 feet.
Coolant sa=ple analyses and offgas release rates do not indicate any fuel da= age occurred.
General Oyster Creek is a non-jet pu=p BWR with licensed pcwer 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" Yarvey (13'4" over top of fuel) reactor water level 1020 psig reactor pressure 7.1x106 i/hr feedflow 70 14.8x104 gpm recirculation flow rate (4 pumps) 12 psid core op IYica "D" recire pump 00S due to DUPLICATE DOCUMENT "B" startup transformer OOS f Entire document previously entered into system under-xNo 7. %.. % 0. h,5 / A Y No. of pages: _ ff
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