ML19224C570
| ML19224C570 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Woolever E DUQUESNE LIGHT CO. |
| References | |
| NUDOCS 7907030027 | |
| Download: ML19224C570 (1) | |
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fiay 29,1979 Docket No. 50-412 Duquesne Light Company ATTN: Mr. E. J. Iloolever Vice President 435 Sixth Avenue Pittsburgh, Pennsylvania 15219 Gentlemen:
This Irformation Notice is provided as an early notification of a possibly significant matter.
It is exoected that recipients will review the information for possible applicabi.ity to their facilities.
No specific action or response is reauested at this time.
If further NRC evaluations so 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.
Sincerely, 7
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Boyce H. Grier
" Director Enclosurec-1.
IE Infors,eti r Notice No. 79-13 w/ enclosures 2.
List of Information Notices Issued in 1979 cc w/encls:
R. J. Washabaugh, Quality Assurance Manager 21q lb c
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UNITED STATES NUCLEAR REGULATORY C0t@lISSION OFFICE 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 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 (triplq 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 "t)iole low level" setpoint of 4-feet, 8-inchet 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 analyus 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 7.1x10gigreactorpressure 1020 p
- /hr feed flow 4
14.8x1C gpm recirculation flow rate (4 pumps) 12 psid core op Equipment Out of Service (005)
"D" recirc pump 005 due to seal coolc "B" startup transformer 005 for insp D'3PLICATE DOCUMENT 2 7 c q 2(38 Entire document previously entered into system under:
ANO 7d}d8dM/ 8 h No. of pages:
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