ML20216J686
| ML20216J686 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 08/23/1978 |
| From: | Klingler G, Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-78-148, NUDOCS 9804210454 | |
| Download: ML20216J686 (1) | |
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PRELIMINARY NOTIFICATION d,
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i August 23, 1978 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PN0-78-148 i
~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.
1 FACILITY:
Tennessee Valley Authority Browns Ferry, Unit No. 3
~
Docket No. 50-296 Athens, Alabama
SUBJECT:
PRIMARY SYSTEM BLOWDOWN s
At 9:23 a.m. on August 22, during reactor startup, a main steam relief valve opened prematerely at 916 psig and remained open until the pres-sure decreased to 200 psig. The unit was placed in cold shutdown to replace the faulty valve.
The Technical Specification limiting cooldown rate of 100 degrees F/hr. was exceeded.
A thermal transient analysis is in progress.
Plant restart h expected today. There was no release of radioactivity to the environment.
g" Media interest is not anticipated.
Neither TVA nor the NRC plan a news l
, (.
release. The State of Alabama has been notified.
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Region II (Atlanta) received notification of this occurrence by telephone from the Assistant Plant Superintendent at 3:35 p.m. on August 22. This information is current as of 8:30 a.m. on August 23.
Contact:
GKlingler, IE x28019 JSniezek, IE x28019 Distribution:
Transmitted H St /.' N Chairman Hendrie Comniissiorier Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Lammerer, CA Commissioner Gilinsky (ForDistribution)
Transmitted:
MNBB /!) b P Bldg /l)Y J. G. Davit IE L. V. Gossick, EDO H. R. Denton', NRR Region i /!3 4 S. H. Hanauer, ED0 J. J. Fouchard, PA SS Bldg /,*Jf (MAIL)
N. M.11 aller, MPA C. V. Smith, NMSS
- 0. G. Abston, DIA R. G. Ryan, OSP R. Minogue, SD H. K. Shapar, ELD PRELIMINARY NOTIFICATION 9004210454 780823 Ol PDR ILE PNO-78-140 PDR
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