ML19221A688
| ML19221A688 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Tallman W PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| References | |
| NUDOCS 7907030069 | |
| Download: ML19221A688 (1) | |
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMIS5'.ON 7
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KING oF PRUSSI A, PENNSY LVANI A 19406 tiay 29, 1979 Docket flos. 50-443 50-444 Public Servica Company of New Hampshire ATTN:
Mr. W. C. Tallman President 1000 Elm Street tdanchester, New Hampsnire 03105 Gentlemen:
This Information Notice is provided 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-cular 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 approp,'iate NRC Regional Office.
Sincerely,
/ hd L
coyce H. Grier Director
Enclosures:
1.
IE Information Notice No. 79-13 w/ enclosures 2.
List of Information Notices Issued in 1979 cc w/encls:
John D. Haseitine, Project Manager 273 014 7907030067,
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 powcr of 1930 MWt.
The plant was first made cr.tical 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 p 7.1x10gigreactorpressure
- /hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core op Equipment Out of Service (005)
"D" recirc pump 00S due to seal coo " ~ " "
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"B" startup transformer 00S for ins DUPLICATE DOCUMEN'T Entire document previously entered into system under:
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