ML20236L505
| ML20236L505 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 02/08/1977 |
| From: | Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-77-025-01, PNO-77-25-1, NUDOCS 9807130035 | |
| Download: ML20236L505 (1) | |
Text
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PRELIMINARY NOTIFICATION
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Fsbru p p 8, 1977 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-77-25
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This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance. The information
. presented is as initially received with6ut verifica. tion or evaluation and is basically all that is known by IE staff on this date.
Facility: Peach Bottom Unit No. 3 (DN 50-278)
Subject:
CORE SPRAY LINE CRACK INDICATIONS During this refueling outage inservice inspections have identified the
~ following pipe cracks in the primary coolant boundary. These cracks have caused a delay in the scheduled date for plant startup from February
- 23 to March 5,1977:
" - ~
1.
One crack on the "A" core spray line to 5/8 inches long and
.070 inches deep - 10% of wall thickness.
(PNO-77-13) 2.
.One crack on the "B" core spray line 7/8 inches long and.025 inches deep - 5% of wall thickness.
3.
One crack on the "B" Recirculatory Loop four-inch bypass line h to 3/4 inches long and.015 inches deep - 10% of wall thickness.
s._
The four-inch bypass line has been, repaired by replacement of
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a 12-inch section of line.
Media interest is not expected. The Commonwealth of Pennsylvania has been informed. A press release is not planned.
NRC, Region I, (Philadelphia) received notification of the latest status on these occurrences by telephone from the Philadelphia Electric Inservice 4'
! nspection Coordinator at 10:00 a.m., February 8, 1977. NRC inspectors
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I have also been on site following investigations and repairs.
Contact:
FADreher, IE x27261 GWRoy, IE x27261 DThompson, IE x27541 d
Distribution:
Chairman Rowden Commissioner Kennedy S. J. Chilk, SE'CY Commissioner Gilinsky C. C. Kammerer, CA G. F. Murphy, JCAE O
L. V. Gossick, EDO K. R. Chapman, NMSS R. G. Ryan, OSP k
S. H. Hanauer, EDO E. Volgenau, OIE J. A. Harris, PA B. C. Rdiche, NRR H. K. Shapar, ELD T. J. McTiernan, OIA
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PRELIMI Z Y NOTIFICATICM f
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w 9807130035 770200 J
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PNO-77-025 PDR E_.___________________.___
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