ML19221A687
| ML19221A687 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek, Limerick |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 7907030055 | |
| Download: ML19221A687 (1) | |
Text
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NUCLEAR REGULATORY COMMISSION y
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May 29, 1979 Docket Nos. 50-352 50-353 Philadelphia Electric Company ATTN: Mr. V. S. Boyer Vice President Engineering and Research 2301 Market Street Philadelphia, PA 19101 Gentlemen:
This Information Notice is pravided 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-calar 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, Yc.X4) o o<
Boyce H. Grier Director
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Enclosures:
1.
IE Information Notice No. 79-13 w/ enclosures 2.
List of Information Notices Issued in 1979
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UNITED STATES NUCLEAR REGULATORY C0!@lISSION 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 reduccion in water inventorj within the reactor core shroud area as measured by one set of water level instreents (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 tne 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 licenced power of 1930 MWt.
The plant was r!rst 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 7.1x100 #/hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core op Equipment Out of Service (005)
"=-=-=-~9 "D" recirc pump 00S due to seal cool
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"B" startup transformer 005 for insp DUPLICATE DOCUMENT Entire document pr i u ntered into system under:
ANO */78ddd O/h No. of pages: