ML19221A710
| ML19221A710 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/29/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7907030129 | |
| Download: ML19221A710 (1) | |
Text
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UNITED sT ATEs
[ '.^., qlik NUCLEAR REGULATORY COMMISSION
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REGION IV k
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611 HYAN PL AZ A DRIVE, SulTE 1000
't,,..... f A R LINGTON, T E X AS 76012 ffay 29, 1979 In Reply Refer To:
RIV Docket rio. 50-545/IE Information Notice 79-13 50-446/IE Information flotice 79-13 Texas Utilities Generating Company ATTil:
fir. R. J. Gary, Executive Vice President and General fianager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
This Infomation flotice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the infonna-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 reconTnend or request specific licensee actions.
If you have questions regarding this matter, please contact the Director of the appropr,iate NRC Regional Office.
Sincerely, f}
I gl' Y
Karl V. Seyfrit[
Director
Enclosures:
1.
IE Infomation Notice No. 79-13 2.
List IE Infomation flotices Issued in 1979 273 157 7907030I29
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 (tripi. 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 ana!.ysis 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 pressure 7.1x10g/hrfeedflow 14.8x10 gpm recirculation flow rate (4 pumps)
'~' " ' - - " " "
- 12 psid core delta p
---~~~~r DUPLICATE DOCUMENT 7 7 3 15 8 Equipment Out-of-Service (00S)
Entire document previously entered "D" recirc pump 00S due to sea into system under:
"B" startup transformer COS fo 7 hhhb
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