ML20249B380
| ML20249B380 | |
| Person / Time | |
|---|---|
| Issue date: | 03/31/1976 |
| From: | Dreher F, Roy G, Thompson D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| IEB-76-04, IEB-76-4, PNO-76-058, PNO-76-58, NUDOCS 9806220382 | |
| Download: ML20249B380 (1) | |
Text
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Y O d/MVf4f-f '?fh 0h PRELIMINARY. NOTIFICATION - NOT POR Punt.IC DISCLOSURE March 31, 1976 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUALc0CCURRENCE
--PNO-76-58 This preliminary notification constitutes EARLY notice of events 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 OIE staff as of 10:00 a.m. on date of this notification.
IT SHOULD BE SPECIFICALLY NOTED THAT THIS NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO
_BE INACCURATE OR INCONSISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT NOTIFICATION OF AN INCIDENT OR OCCURRENCE (BLUE SHEET) SUBSEQUENTLY WILL BE ISSUED IF WARRANTED.
Facility: All BWR Licensees With Operating Licenses
Subject:
CRACKS IN COLD WORK PIPING AT BWR'S (IEB 76-04)
All licensees of BWR power reactor facilities have been requested to develop information for systems N ated within or connected to the reactor coolant system boundary system to identify any piping or fittings which may have been.
cold worked without annealing. This request was contained in IE Bulletin 76-4.
No facility shutdowns are anticipated. This problem was highlighted by 3 through wall cracks at NMP (PN-50 and 53).
Nondestructive volumetric i
examination of similar piping revealed cracks in 11 pipe bends.
This bulletin (76-04) is unrelated to problems identified in 1975 when throughwall cracks were revealed in core spray piping at Dresden 2 (IE Bulletin No. 75-01 and IE Bulletin No.75-01A) and which required plant shut-down to perform representative sampling of welds in specific piping, also part of the reactor coolant pressure boundary.
Media interest is expected because of prior press coverage and sensitivity O
to nuclear power issues. The States will be informed. A press release is
/
9 planned.
/
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Contact:
O Distribution:
2 Chairman Anders Commissioner Mason S. J. Chilk, SECY Commissioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE Commissioner Kennedy C. C. Kammerer, CA 1
L. V. Gossick, J. G. Davis, OIE J. A. N rris, PA 4
B. C. Rusche, NRR J. La Fleur, ISP T. J. McTiernan, AIA K. R. Chapman, NMSS H. K. Shapar, ELD Transmitted:
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PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE
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.t 9906220382 760331 PDR ISE PNO-76-058 PDR
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