ML19221A705
| ML19221A705 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 05/29/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Weigand D GULF STATES UTILITIES CO. |
| References | |
| NUDOCS 7907030122 | |
| Download: ML19221A705 (1) | |
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UNITE D STATES NUCLEAR REGULATORY COMMISSION
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AR LINGTON. TE X AS 7G012 May 29,1979-In Reply Refer To:
'RIV Ibcket ?!o. 50-458/IE Information tiotice 79-13 50-459/IE Infonnation flotice 79-13 i
Gulf States Utilities ATTil: Dr. D. G. Weigand, General Manager fluclear Projects Post Office Box 29S; Beaumont, Texas 77704 Gentl emen:
This Infonnation tiotice is provided as an early notification of a possialy significant matter.
It is expected that recipients will review the informa-tion for possible applicability to their facilities. tio specific action or response is requested at this time.
If further flRC 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, please contact the Director of the appropriate tiRC Regional Office.
Sincerely, f
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Karl V. Seyfri-Director
Enclosures:
1.
IE Information flotice flo. 79-13 2.
1.ist IE Information i;otices Issued in 1979 273 147
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22
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
. vel 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 levd 79" Yarway (13'4" ovet top of fuel) reactor water level 1020 pgig reactor pressure 7.1x10g/hrfeedflow 14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core delta pres Equipment Out-of-Service (00S)
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