ML19221A689
| ML19221A689 | |
| Person / Time | |
|---|---|
| Site: | Sterling |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Arthur J ROCHESTER GAS & ELECTRIC CORP. |
| References | |
| NUDOCS 7907030072 | |
| Download: ML19221A689 (1) | |
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UNITED STATES
[ -[j, y']' j NUCLE AR REGULATORY COMMISSION 3 r,.hi SE, j REGION i
$ h.4Jdy A e g 631 PARK AVENUE h,,
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KING OF PRUSSI A. PENNSY LV ANI A 19405 May 29, 1979 Docket No. 50-485 Rochester Gas & Electric Corporation ATTN:
Mr. J. E. Arthur Chief Engineer 89 East Avenue Rochester, NY 14649 Gentlemen:
This Information PLtice 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 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, e
/h L
Boyce H. Grier
' Director
Enclosures:
1.
IE Information Notice No. 79-13 w/ enclosures 2.
List of Info.mation Notices Issued in 1979 cc w/encls:
C. R. Anderson, l tanager, OA Lex K. Larson, Esquire N. A. Petrick, Executive Director, Si!UPPS Gerald Charnoff, Esquire 273 016 7 907 030 07J,
UNITED STATES tiUCLEAR REGULATORY COMMISSION 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 easured by one set of water level instruments (triple low level),
while the remai.;ng level instruments, sensing frcm the reactor annulus area indicated water levels above any protective feature setpoint (Fi ure 1). The water level within the core shroud area was reduced below the "wiple 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 t'Wt.
The plant was first made critical May 3, 1969.
Status Before Transient Operating at near full power with the nain parameters at levels as follows:
1895 MWt power level 79" Yarway (13'4" over top of fuel) reactor water level 1020 psig reactor pressure 7.1x106 #/hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core op Equipment Out of Service (005)
"D" recirc pump OOS due to seal coolE DUPLICATE DOCUMENT "B" startup transformer 00S for insp 273 017 Entirc document previously entered into system under:
1QOf f f f /&h ANO No. of pages:
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