ML20216K093

From kanterella
Jump to navigation Jump to search
PNO-78-175:on 780927 Ultrasonic Exam of One Jet Pump Riser safe-end Disclosed Indication of Possible Anomaly.Subsequent Radiographic Exam Did Not Correlate Indications Found by Ultrasonic Exam.Review by NRC & Licensee Continuing
ML20216K093
Person / Time
Site: Brunswick Duke Energy icon.png
Issue date: 09/29/1978
From: Collins W, Jordan E, Woodruff R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-78-175, NUDOCS 9804220091
Download: ML20216K093 (1)


Text

PT>P QU% G 3

Su N f.

i PRELIMINARY NOTIFICATION d.- '

~,

September 29, 1978 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-78-175

.This preliminary notification constitutes EARLY notice of an event of

_POSSIBLE safety or public interest significance. The information presented ir as initially received without verification or evaluation and is basically all that is known by IE staff on this date.

I F_ACILITY: Carolina Power and Light Company Brunswick, Unit No. 1 ,

(

Docket No. 50-325 i

Southport, North Carolina l

SUBJECT:

ULTRASONIC INDICATION OF POSSIBLE AN0MALY ON ONE JET PUMP RISER SAFE-END WELD Ultrasonic (UT) examination of one jet pump riser safe-end September 27 -

disclosed an indication of a possible anomaly. Subsequent radiographic ~ ,

examination did not correlate indications found by ultrasonic examination.

This weld is at the point where the jet pump riser penetrates the reactor m vessel. The examination was conducted as a result of cracks found in similar safe-ends at the Duane Arnold facility.' The licen:;ee has concluded  !

a .as a result of analysis done to date that this indication.is not significant; I however review by both the licensee and NRC is continuing. Unit No. 1 startup on September 29, is planned. Earlier UT examinations of nozzle l safe-ends on Unit 2 revealed no significant indications and Unit 2 has ,

I returned to operation.

Media interest is not expected. A press release is not planned by the ,

I licensee nor NRC. The State of North Carolina has been notified. l l \

Region II (Atlanta) received notification of this occurrence by telephone from the Plant Manager at 4:00 p.m. on September 27. This information is current as of 4:00 p.m. on September 29.

Contac t: RWoodruff, IE x28180 WCollins; IE x28180 EJordan, IE x28180

.D_istributico:

Transmitted H St -

Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Conniss40ner Gilinsky (ForDistribution)

Transmitted: f1NBB $N P Bldg b J.'

L. V. Gossick, ED0 H.R.DentanTHRR G. Davis,JE Regionft.- Jo 1 0 ,;

S. H. Hanauer, EDO e J. J. Fouchard, PA SSBldgo'-[/C (MAIL) p,1 N. M. Haller, MPA C. V. S6EfiTNMSS 0. G. Abston, OIA  ;

R. C. Ryan, OSP R. flinogue, SD oj  !

H. K. Shapar, LLD 9804220091 780929

, , . G r*, PRU. MINARY No rli1 CATION Db '

PDR I&E PNO-78-175 PDR