PNO-II-80-144, on 800826,reactor Trip & Safety Injection Occurred Due to Spurious Steam Header to Steam Line Differential Pressure Caused by Entrapped Air in Bypass Around Newly Installed Polishing Demineralizers
| ML18139A591 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 08/27/1980 |
| From: | Andrea Johnson, Kellogg P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| References | |
| PNO-II-80-144, NUDOCS 8010160588 | |
| Download: ML18139A591 (1) | |
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PRELIMINARY NOTIFICATION '
August 27, 1980
- PRELIMINARY.,NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PNO-II-80-144 This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance.
The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff as of this date FACILITY:
Virginia Electric and Power Company Surry Unit No. 2 Docket No. 50-281 Surry, Virginia
SUBJECT:
REACTOR TRI? AND SAFETY INJECTION ACTUATION At 10:07 p.m. on August 26, while increasing power to 80%, a reactor trip and safety injection occurred due to spurious steam header to steam line differential pressure caused by entrapped air in a bypass line around the n-ewly installed polishing demin-eralizers in the condensate system.
The plant conditions stabilized to normal post-trip conditions and the safety injection was terminated in accordance with plant procedures.
Stone and Webster will perform a hydraulic analysis of the feedwater system to determine the cause of the entrapped air and the necessary corrective actions.
The plant is returning to SO% power to conduct testing for this analysis.
Media interest in not expected. Neither licensee nor NRC plans to issue a news release.
The Commonwealth of Virginia has been notified.
The NRC Emergency Response Center received notification of this occurrence by telephone from the licensee at 10:28 p.m. on August 26.
This information is current as of 1:00 p.m. on August 27.
Contact:
A. Johnson, RII, 242-$570; P. J. Kellogg, RII 242-5649 Distribution:
Transmitted H. St.
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Chairman Ahearne Commissioner Gilinsky Transmitted:
MNBB~.'SO W. J. Dircks, EDO C~ Michelson, AEOD J. J. Fouchard, PA N. M. Haller, MPA R. G. Ryan, SP H. K~-Shapar, ELD Applicable Resident Site ;5: o7 Commissioner Hendrie Commissioner Bradford ACRS P. Bldg. ~(3~
H. R. Denton, NRR R.H. Vollmer, NRR R. J. Mattson, NRR D. F. Ross, NRR D. Eisenhut, NRR S. H. Hanauer, NRR S. J. Chilk, SECY C. C. Kammerer, CA (For Distribution)
IE:X00~;~.5. (IE:HQ Dist.)
Landow ;;i,*<';$ (6 min/page)
J. J. Cummings, OIA MAIL R. Minogue, SD IE:XOOS Br. (For PDR/LPDR)
Willste,2,1 2 t,.
Document Hgt.
J. G. Davis, 'NMSS ~
Regional Offices P.'c(O R. J. Budnitz, RF.S*:
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PRELI!IIIIARY IIOTIFICATIOR
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80101~0588
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