ML19263E525
| ML19263E525 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 05/29/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 7906200039 | |
| Download: ML19263E525 (1) | |
Text
CENTRAL FILES UNITED STATES NUCLEAR REGULATORY COMMISSION PDR:HQ g
o REGION IV
' ^ g A, I
- c.,E 611 RYAN PLAZA DRIVE, SUITE 1000 S
4 U3IC
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ARLINGTON. TEXAS 76012 i
MCIA 9*****
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May 29, 1979 s
Mcket Nos. 50-313 50-368 Arkansas Power and Light Company ATTN: Mr. William Cavanaugh III Vice President of Generation and Construction P. O. Box 551 Little Rock, Arkansas 72203 Gentlemen:
This Information Notice is provided as an early notification of a possibly It is expected that recipients will review the informa-significant matter.
tion 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 recoc: mend or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely, a
't
- g Karl V. Seyfr' Director
Enclosures:
1.
IE Information Notice No. 79-13 2.
List IE Information Notices Issued in 1979 cc: James P. O'Hanlon, Plant Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 2288 230 L. Alexander, QC Supervisor 7906200039
UNITED STATES NUCLEAR 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 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 1020 pgig reactor pressuregg }}} 7.1x10g/hrfeedflow 14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core delta pr Equipment Out-of-Service (00S) DUPLICATE DOCUMENT "D" recire pump 00S due to seal "B" startup transformer 00S for Entire document previously entered into system under: ANO f) N o. of pages: f il}}