ML19224C568
| ML19224C568 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/29/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Dunn C DUQUESNE LIGHT CO. |
| References | |
| NUDOCS 7907030025 | |
| Download: ML19224C568 (1) | |
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UNITED STATES
[h.c.f'j NUCLEAR REGULATORY COMMISSION
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KING OF P AUSSI A, PENNSYLVANI A 19'06 Docket No. 50-334 Duquesne Light Company ATTN:
Mr. C. N. Dunn Vice President Operations Division 435 Sixth Avenue Pittsburgh, Pennsyl <ania 15219 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 racommend or request specific licensee actions.
If you have questions regarc'ing this matter, please contact the Director of the appropriate NRC Regional Office.
Sincerely,
&f}, Y g Boyce H. Grier Director
Enclosures:
1.
IE Information Notice No. 79-13 w/ enclosures 2.
List of Information Notices Issued in 1979 cc w/encls:
F. Bissert, Technical Assistant Nuclear R. 'dashabaugh, QA Manager J. 'derling, Station Superintendent G. Moore, General Superintendent, Power Stations Department J. J. Carey, Nuclear Technical Assistant 272 265 7907 0300RE
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF IiiSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Information Notice No. 79-13 Date:
May 29, 1979 Page 1 of 4 INDICATI0ri 0F 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 detcrmined that the minimum collapsed water lcvel (solid, without steam voids) over the top of the fuel was 1 to 1-1/2 feet.
Coolant sample analyses and effgas release rates indicate that no fuel damage occurred.
Generel Oyster Creek is a non-jet pump BUR with licensed power of 1930 MWt.
The plant was first made critical May 3,1969.
Status Beforc.~ransient 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 ppig reactor pressure 7.1x100 #/hr feed flow 4
14.8x10 gpm recirculation flow rate (4 pumps) 12 psid core ap Equipment Out of Service (00S)
," BD" recirc pump 005 due to seal coolDUPLICATE DOCUMENT startup transformer 00S for insp j
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