ML19221A706
| ML19221A706 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 05/29/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Eric Turner HOUSTON LIGHTING & POWER CO. |
| References | |
| NUDOCS 7907030123 | |
| Download: ML19221A706 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION
- pf (( i / 8 REGION IV 611 RYAN PLAZA r.IVE, SulT E 1000 o,, i><
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May 29, 1979
-In Reply Refer To:
RIV Cocket l!o. 50-498/IE Infonnation tiotice 79-13 50-499/IE Information flotice 79-13 Houston Lighting and Power Company ATTrl: Mr. E. A. Turner, Vice President Power Plant Construction and Technical Services Post Office Box 1700 Houston, Texas 77001 Gentlemen :
This Information riotice is provided as an early notification of a possibly significant matter.
It is expected that recipients will review the informa-tion for possible applicability to their facilities.
fio spe-ific action or response is requested at this time.
If further flRC ev.luations so indicate, an IE Circular or Bulletin will be issued to recomy d or request specific licensee actions.
If you have questions regarding this matter, please contact the Dir,ector of the appropriate flRC Regional Office.
Sincerely, L-e n.
Karl V. Sey fri Director Enclosures :
1.
IE Information flotice flo. 79-13 2.
List IE Information flotices Issued in 1979 273 M9 7907030123
UNITED STATES NUCLEAR REGULATORY COMMISSION-0FFICE 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.
Gene ral 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 7.1x10{/hrfeedflow 14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core delta pre -
Equipment Out-of-Service (005,,
2 ~i 3 1CO DUPLICATE DOCUMENT 7"
iJv Entire document previously entered "D" recirc pump 00S due to seal in system under.
"B" startup transformer 00S for 7 i O b O b D [(b Y ANO No. of pages:
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