05000461/FIN-2015002-01
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Finding | |
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| Title | Fuel Handling Building (FHB) Railroad Bay Airlock Design and Licensing Basis Issues |
| Description | The inspectors identified an unresolved item (URI) concerning the licensing and design basis of the FHB railroad bay airlock structure. The inspectors reviewed EC 395976, ISFSI [independent spent fuel storage installation]-Extend Secondary Containment Boundary to FB Outer RR Bay Doors, Revision 0. This EC established the boundary of the secondary containment to include the FHB railroad bay airlock to support ISFSI cask transport operations. Section 6.2.3.1 of the USAR stated, in part, The secondary containment structure is of Seismic Category I design... and USAR Table 3.21, Classification of Systems, Components and Structures, Note c, states, The equipment is constructed in accordance with the seismic requirements of Seismic Category I structures and equipment as described in Section 3.7. All civil structures classified as Seismic Category I are designed for the effects of CPS natural phenomena such as tornado, wind loads, external missiles, floods, etc., except the containment gas control boundary building (CGCB). The CGCB is a Seismic Category I structure capable of withstanding all of CPS natural phenomena except the tornado and external missiles. The inspectors reviewed Calculation SDQ15-23DG09, Seismic Evaluation of RCIC Tank and Access Building, Revision 9c. This calculation was the analysis for the FHB railroad bay airlock structure to demonstrate compliance with USAR Section 6.2.3.1. The inspectors identified that the calculation did not address all required Seismic Category I loading conditions, specifically the tornado load and loads from tornado generated missiles applied to the FHB railroad airlock bay structure. In response to the concern the licensee initiated AR 02443227, Analysis of Fuel Building Railroad Shed for Tornado Winds, dated December 19, 2014. The licensee provided the inspectors additional information on the design and licensing basis of the FHB railroad bay airlock, which may require additional NRC review. Therefore, this issue is considered unresolved pending additional inspector review of the information provided by the licensee and consultation with The Office of Nuclear Reactor Regulation (NRR) to determine the design and licensing basis requirements of the FHB railroad bay airlock at Clinton (URI 05000461/201500201: Fuel Handling Building Railroad Bay Airlock Design and Licensing Basis Issues). |
| Site: | Clinton  |
|---|---|
| Report | IR 05000461/2015002 Section 1R18 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.18 |
| Inspectors (proximate) | S Bell S Mischke W Schaup A Dahbur C Phillips E Sanchez-Santiago J Bozga K Stoedtera Shaikhc Phillips E Sanchez-Santiago J Bozga M Jones P Louden S Mischke W Schaup |
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Finding - Clinton - IR 05000461/2015002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Clinton) @ 2015Q2
Self-Identified List (Clinton)
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