05000254/FIN-2013003-05
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Finding | |
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| Title | Steam Dryer/Steam Separator Lifting Device Fracture Toughness Properties |
| Description | The inspectors determined that an unresolved item (URI) existed concerning the fracture toughness properties of the steam dryer/steam separator lifting device. The safety evaluation report for the Control of Heavy Loads Phase 1 at Quad Cities Units 1 and 2, dated June 27, 1983, classified the steam dryer/steam separator lifting device as a special lifting device and provided documentation how compliance with ANSI N14.6-1978, Standard for Lifting Devices for Shipping Containers Weighing 10,000 Pounds (4500 kg) or more for Nuclear Materials, was met. The inspectors reviewed Calculation No. 487-002Ca, Steam Dryer/Steam Separator Lifting Device Calculation, Revision 1, that was used to demonstrate compliance with ANSI N14.6. ANSI N14.6-1978, Section 3.2.1.1 states in part, when materials that have yield strengths above 80 percent of their ultimate strength are used, each case requires special consideration, and the foregoing stress design factors do not apply. Design shall be on the basis of the materials fracture toughness, and the designer shall establish the criteria. The inspectors identified in Calculation No. 487-002Ca that the socket pin, hook pin, and lock pin of the steam dryer/steam separator lifting device had yield strengths greater than 80 percent of their ultimate strengths. During the time of the inspection, Calculation No.487-002Ca did not contain an evaluation of these structural elements based on their fracture toughness properties and did not contain a brittle fracture analysis. In response to this concern, the licensee initiated IR 1517114, Dryer/Separator Strongback Calculation Discrepancies, dated May 23, 2013, to address this concern. During the time of the inspection, the license was not able to locate information with respect to the fracture toughness properties of the hook pin, socket pin, and lock pin. The licensee is investigating the lifting device further with the vendor of the lifting device and plans to provide additional information on the fracture toughness properties and determine a factor of safety against brittle fracture of the lock pin, socket pin, and hook pin, which will require additional inspector review. Therefore, this issue is considered an unresolved item (URI 05000254/2013003-05; 05000265/2013003-05, Steam Dryer/Steam Separator Lifting Device Fracture Toughness Properties), pending additional inspector review. |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2013003 Section 1R20 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | B Cushman B Jose C Lipa C Phillips J Bozga R Murrayb Cushmanc Lipa C Mathews D Szwarc G O'Dwyer J Bozga J Mcghee L Jones R Langstaff S Bell |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2013003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2013Q2
Self-Identified List (Quad Cities)
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