ML19256C627
| ML19256C627 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/23/1979 |
| From: | Bryan S, Nolan F, Riesland J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-122, NUDOCS 7910100633 | |
| Download: ML19256C627 (1) | |
Text
PRELIMINARY NOTIFICATION May 23', 1979 gh PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-79-122
./)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 on this date.
CACILITY:
Tennessee Valley Authority Sequoyah, Unit Nos. 1 and 2 Docket Numbers 50-327 and 50-328 Chattanooga, Tennessee
SUBJECT:
STRESS ANALYS b CF FiPING SUPPORTS The licensee verbally reported on May 22, that a Tennessee Valley Authority review of safety related piping support design indicates that summation was not ;nade of the static, thermal and safe shutdown earthquake forces at their Sequoyah facili-ties.
Unit 1 is complete and awaiting issuance of an operating license; Unit 2 is under construction and is about 80% complete.
The largest force was apparently used in the design of piping supports instead of an appropriate summation of all forces.
Initial indications are that safety related systems are involved.
The effect of this problem on schedules is not known.
An IE inspector is being dispatched to review this problem.
There has been no media interest.
A news release is not planned at this time by the licensee or NRC.
The State of Tennessee has been notified.
Region II (Atlanta) received notification of this occurrence by telecon from the licensee at 3:30 p.m. on May 22.
This information is current as of 10:30 a.m.
on May 23.
Contact:
J. I. Riesland, IE x28019; F. Nolan, IE x28019; S.E. Bryan, IE x28019 Distribution:
Transmitted H St 5.. E Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky ACRS (For Distribution)
Transmitted:
MNBB3'1 P. Bldg ( H J. G. Davis,_IE _
L. V. Gossick, ED0 H. R. Denton, NRR Region $
0' M H. L. Ornstein, EDO R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA V. Stello, NRR (MAIL)
R. G. Ryan, OSP R. S. Boyd, NRR J. J. Cummings, 01A H. K. Shapar, ELD SS Bldg o ' SO R. Minogue, SD W. J. Di D sT NMSS S. Levine, RES PRELIMINARY NOTIFICATION l49I 7910100 h [