ML19256C989
| ML19256C989 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 06/12/1979 |
| From: | Bryan S, Klingler G, Nolan F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-149, NUDOCS 7910150824 | |
| Download: ML19256C989 (1) | |
Text
PRELIMINARY NOTIFICATION June 12,1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-79-149 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:
Carolina Pawer and Light Company H. B. Robinson, Unit No. 2 Docket No. 50-264 Hartsville, South Carolina
SUBJECT:
CANOPY SEAL WELD LEAKS EXTEND OUTAGE On June 8, during plant heatup3 pinhole leaks were identified on two control rod drive mechanism housing canopy seal welds.
The canopy seal welds had been repaired during the current refueling outage and the leakage was identified during an inspec-tion to verify weld integrity. The canopy seal welds are provided as a leakage barrier between the control rod drive mechanisms and the reactor vessel head; they do not provide structual integrity of the control rod drive mechanism housing.
The cause of these leaks is believed to be related to insufficient moisture removal prior to welding.
The repair of the canopy seals will extend the current refueling outage to June 16.
During the outage extention, the licensee also intends to per-form a nondestructive examination of feedwater nozzles.
Media interest is not anticipated.
The licensee is planning to issue a news release. A news release
.y the NRC is not planned. The State of South Carolina has been informed.
Region II (Atlanta) received notification of this occurrence by telephone from the licensee at 8:45 a.m. on June 11.
This information is current as of 3:30 p.m. on June 11.
Contact:
GKlinglec, IE 28019 FNolan, IE x28019 SEBryan, IE x28019 Distribution:
Transmitted H St 9.'2C Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky ACRS (For Distribution)
Transmitted: MNBB O'30 P. Bldg T.32 V. Stello, IE L. V, Gossick, EDO H. R. Denton, NRR Region;;[__ A'.dC H. L. Ornstein, EDO R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA R. S. Boyd, NRR (MAIL)
R. G. Ryan, OSP SS Bldg 9 ',3 T
J. J. Cummings, OIA H. K. Shapar, ELD W. J. Dircks, NMSS R. Minogue, SD S. Levine, RES PRELIMINARY NOTIFICATION 1450 190 7910150 2y j
.