ENS 51291
ENS Event | |
|---|---|
07:00 Aug 4, 2015 | |
| Title | Part 21 - Potential Radioactive Material Transport Packaging Shielding Failing to Comply with 10Cfr71.47 And/Or 10Cfr71.51 |
| Event Description | The following information is a summary that was excerpted from a facsimile received from Alpha-Omega Services, Inc.:
Pursuant to 10CFR 21.21 (d)(3)(ii) Alpha-Omega Services, Inc. [AOS] is providing the USNRC with written notification of the identification of a potential failure to comply. The following information is required per 10CFR 21.21 (d)(4): Name and Address of the individual or individuals informing the Commission. Troy Hedger, President, Alpha-Omega Services, Inc., 9156 Rose Street, Bellflower, CA 90706 Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which fails to comply or contains a defect. AOS Document Number FM9054, Rev. H, Radioactive Material Transport Packaging System Safety Analysis Report for Model AOS-025, AOS-050, and AOS-100 Transport Packages (Revision H, December 30, 2012; Docket No. 71-9136) Model AOS-100A Package, USA/9316/B(U)-96 (Certificate of Compliance #9316) Nature of the defect of failure to comply and the safety hazard which is created or could be created by such defect of failure to comply. There is a potential issue that shielding fails to comply with 10CFR 71.47 and/or 10CFR 71.51 (a)(2). This is not a 'defect' of the package, but rather an un-analyzed condition that could lead, if credible, to a safety hazard. DAHER-TLI Engineering Services notified AOS via telephone conversation on July 28, 2015 that there is a possible discrepancy in the original SAR shielding calculations originally performed. The potential discrepancy was discovered in conjunction with the independent preparation of a DAHER-TLI symposium paper that they are working on for presentation for future use of the AOS Cask family products. Specifically, DAHER-TLI observed that the AOS SAR does not analyze the radiation levels on the exterior of the package when a point source is located in a corner of the cask cavity. In the case of a basic component which contains a defect or fails to comply, the number and location of these components in use at, supplied for, or may be supplied for, manufactured, or being manufactured for one or more facilities or activities subject to the regulations in this part. Currently, four (4) AOS-100A packages have been fabricated and three (3) were certified for use prior to August 4, 2015; one (1) is currently not in service. There are two (2) AOS-050 packages which are on hold for completion of fabrication activities. The following are the locations of the active units: AOS - Bellflower, CA, Serial no. AOS-100A-0001 (not currently in service); Elekta - Nordion Ottawa, Canada, Serial no: AOS-100A-0002; AOS - GE Vallecitos Sunol, CA, Serial no: AOS-100A-0003; Elekta - Nordion Ottawa, Canada, Serial no: AOS-100A-0004
The following update information is a summary that was excerpted from a facsimile received from Alpha-Omega Services, Inc.: As of August 6, 2015, responsible personnel for the owner/users of the AOS Packages have been notified in writing, as follows: Elekta AB GE-Hitachi International Isotopes, Inc. Nordion Source Production and Equipment Co., Inc. Based on our initial evaluation, AOS has initiated CAPA No. FM9016.1-082015-001 for providing corrective action relating to the above-identified subject. A 10 CFR Part 21 Applicability Form (re. FM9015.2-082015-001) has also been prepared and is currently under evaluation. The CAPA identifies the issue and begins the internal investigation process to determine the cause and to identify corrective action(s); this investigation is currently in progress. 1. AOS has initiated a Part 21 evaluation to determine applicability. 2. In parallel, AOS has contacted the NRC to inform the project manager of the concern; and to seek guidance/advice as to the direction that this evaluation needs to proceed. 3. Assuming that all of the activity is condensed in a point source in the corner of the cavity is a very conservative assumption. 4. In reality there may not be a problem due to self-shielding and distributed activity; i.e., it is very unlikely to have all of our activity in a single source and if we did, we would constrain it to the center of the cavity. In parallel to this notification, AOS is notifying the owners and users of the AOS-100 package of this potential failure to comply. For additional information, contact the following; Troy Hedger, President Alpha-Omega Services, Inc. 9156 Rose Street Bellflower, CA 90706 Notified R4DO (Azua) and Part 21 Materials Group via email.
The analysis and corrective actions stated in previous updates have been completed therefore the vendor considers this Part 21 notification completed. Notified R4DO (Warnick) and Part 21 Materials group via email. |
| Where | |
|---|---|
| Alpha-Omega Services, Inc Bellflower, California (NRC Region 4) | |
| Organization: | Alpha-Omega Services, Inc |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+36.03 h1.501 days <br />0.214 weeks <br />0.0494 months <br />) | |
| Opened: | Troy Hedger 19:02 Aug 5, 2015 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Mar 16, 2016 |
| 51291 - NRC Website | |
Alpha-Omega Services, Inc with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
WEEKMONTHYEARENS 512912015-08-04T07:00:0004 August 2015 07:00:00
[Table view]10 CFR 21.21(d)(3)(i), Failure to Comply or Defect Part 21 - Potential Radioactive Material Transport Packaging Shielding Failing to Comply with 10Cfr71.47 And/Or 10Cfr71.51 2015-08-04T07:00:00 | |