ML13191A571

10CFR21 Interim Report - Linear Indications/Cracks in Flange Forging, Model N-E13DM Pressure Transmitter

ML13191A571
Person / Time
Site:	Fort Calhoun
Issue date:	06/28/2013
From:	Gaither A Ultra Electronics
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML13191A571 (2)

Text

Nuclear Sensors & Process Instrumentation Round Rock, Texas, USA / www.ultra-nspi.com Ultra Electronics, Nuclear Sensors & Process Instrumentation is a business name of Weed Instrument Co., Inc.

June 28, 2013 10CFR21 ATTN: Document Control Clerk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-001

Subject:

10CFR21 Interim Report- Linear Indications/Cracks in Flange Forging, Model N-E13DM Pressure Transmitter Ultra Electronics, NSPI, in conjunction with Omaha Public Power District (OPPD), Fort Calhoun Station FC-1-5 Plant, recently identified the existence of linear indications/cracks in the body flange forging on a model N-E13DM pressure transmitter.

Ultra Electronits, NSPI is currently pursuing a 10CFR21 investigation to document the root cause for'the indications and provide an engineering evaluation of the reported conditionw.ý"

On May 1, 2013, personnel from OPPD concluded that the indications/cracks observed in the transmitter flange could constitute a possible reportable condition pursuant to 10CFR21, "Reporting of Defects and Noncompliance", and, as such, required additional evaluation. However, this evaluation is not expected to be complete until August 31, 2013. Pursuant to the reporting requirements of 10CFR21.21(a)(2), if the evaluation of the deviation orfailure to comply potentially associated with a substantial safety hazard cannot be completed within 60 days (i.e., June 28, 2013), an interim report must be submitted to the NRC. The enclosure to this letter provides information required by 10CFR24.21 (a)(2) for the interim report of this condition.

Re s,-' "' . ".' " " !." f; Adam :Gaither Vice President, Engineering ". .. . ,1. ' i . .'.. .

Ultra Electronics, NSPI .,."

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Ultra Electronics, Nuclear Sensors & Process Instrumentation 707 Jeffrey Way P.O. Box 300 Round Rock, TX 78680-0300 U.S.A.

Telephone (512) 434-2800 Fax (512) 434-2951

Nuclear Sensors & Process Instrumentation Round Rock, Texas, USA/ www.ultra-nspi.com Ultra Electronics, Nuclear Sensors & Process Instrumentation is a business name of Weed Instrument Co., Inc.

ENCLOSURE 10CFR21 Interim Report - Linear Indications/Cracks in Model N-E13DM Flange Forging 6/28/2013 Name and Address of the Individual Making the Interim Report:

Adam Gaither Vice President, Engineering Ultra Electronics, NSPI 707 Jeffrey Way Round Rock, TX 78680-0300 Description of the Deviation or Failure to Comply that is being evaluated:

Linear indications/cracks were discovered in the flange forging on four N-El 3DM pressure transmitters recently supplied by Ultra Electronics, NSPI to Omaha Public Power District (OPPD), Fort Calhoun Station FC-1-5 Plant. These transmitters with the identified indications had been received by Fort Calhoun but were not installed. Three of the four transmitters have been returned to Ultra Electronics, NSPI for evaluation and analysis. At this time, the fourth transmitter is in process of being returned for additional evaluation.

Evaluation Status:

Ultra Electronics, NSPI has performed an initial assessment and determined that the indication/crack penetrates the forging beyond the specified minimum wall thickness. At this time Ultra Electronics, NSPI is in the process of contracting a third party metallurgical research laboratory to assist with evaluation and root cause analysis.

Ultra Electronics, NSPI will supply forging samples to the metallurgical research laboratory for analysis including material/composition characteristics as well as the structure and physical characteristics of the indications. Ultra Electronics, NSPI will continue to work with the forging vendor to determine root cause and the extent of the affected material.

Completion of the Evaluation:

The evaluation is expected to be completed on or before August 31, 2013 Ultra Electronics, Nuclear Sensors & Process Instrumentation 707 Jeffrey Way P.O. Box 300 Round Rock, TX 78680-0300 U.S.A.

Telephone (512) 434-2800 Fax (512) 434-2951