ML100920093
| ML100920093 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Browns Ferry, Oconee, Mcguire, Kewaunee, Catawba, Watts Bar, Sequoyah, Bellefonte, Fort Calhoun, McGuire  |
| Issue date: | 03/25/2010 |
| From: | Nava R Crane Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2011-0115 | |
| Download: ML100920093 (2) | |
Text
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CRAN E NUCLEAR TELEPHONE (630) 226-4900 FAX (630) 226-4646 CRANE NUCLEAR, INC.
860 REMINGTON BLVD.
BOLINGBROOK, IL 60440 March 25, 2010 US Nuclear Regulatory Commission Washington, DC 20555-0001 Attention:
Document Control Desk
Subject:
10CFR21 Notification of a Potential Weld Defect
Reference:
Undocumented Inspection of Welds
Dear Sir or Madam:
Crane Nuclear, Inc. has become aware of a deficient fillet weld that was identified by a customer and the subsequent review by Crane of all weld records revealed that the inspection of some leak off pipes / vent was not documented.
Crane Nuclear, Inc. has reviewed design and manufacturing records for all orders which had this type of weld. From this review we have determined that only a small number of orders did not have proper documentation of the weld inspection to support design compliance. Crane has sent I 0CFR21 notification letters on this issue to the following customers:
CRANE NUCLEAR INC.
SALES ORDER DRAWING Customer/PO NUMBER Dominion Energy 45668430 Dominion Energy 45655828 Duke Energy ON 41905 Duke Energy 00091378 Omaha Public Power District 00065142 Omaha Public Power District 00074717 TVA Nuclear 00031943 35197 34824 11911 31377 22929 24934 31982 CD04938 CC04864 CA02633 CC04426 CD03130 CD03130 CD04407 DESCRIPTION OF PART AFFECTED 2 - Bonnet Assemblies 2 - Covers 6 - Valves I - Valve 3 - Valves 2 - Valves I -Valve FILLET WELD SIZE 3/16" 1/4" 3/16" 1/8" 1/8" 1/8" 3/16" Crane has also identified that a foreign utility was affected by this same issue and they have also been notified of this potential defect / failure to document inspection of welds.
US Nuclear Regulatory Commission I OCFR2I Notification of a Potential Weld Defect March 25, 2010 - Page 2 Crane has recommended that the owners perform an inspection of the weld to determine its compliance to the design requirement for the fillet weld sizes identified above. Crane is interested in correcting our records and we have asked that the utility to provide information relative to inspections performed.
Crane has submitted via overnight mail a letter to each of the affected customers including the utility that notified Crane initially of the potentially deficient weld.
The immediate corrective measures taken to preclude recurrence of this deficiency was to verbally discuss this issue with all quality assurance, quality inspection and engineering personnel and a more formal process is underway through our corrective action program to prevent recurrence.
If you have any questions please contact me at one of the following, phone 630-226-4940, email mavakcranevs.com, or by fax 630-226-4646.
Sincerely, CRANE Nuclear, Inc.
Rosalie Nava Director Safety and Quality
Enclosures:
IOCFR21 Notification Letters dated 03/25/09 to Dominion, Duke Energy, OPPD and TVA Nuclear