05000259/FIN-2011002-05
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Finding | |
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| Title | Repeated Failure to Control Transient Combustibles in Proximity of the Independent Spent Fuel Storage Facility |
| Description | A Severity Level IV, cited violation (VIO) of 10 CFR 72.212, Conditions of general license issued under 72.210, was identified by the inspectors for the licensees repetitive failure to adequately control transient combustible materials stored in the proximity of loaded dry casks on the ISFSI pad in accordance with site procedures. On February 3, 2011, while performing a routine walkdown of the ISFSI enclosed area, the inspectors observed seven storage cradles, multiple storage pallets and storage devices or cribbing located on or near the dry cask storage pad. The cradles, pallets and cribbing, were all constructed of wood products. The nearest items, were wood cradles located approximately 10 to 15 feet from the closest HI-STORM cask loaded with spent fuel. The other wood storage devices were approximately 20 feet from the closest loaded cask and were located both on and off the ISFSI pad. No apparent work was in progress at the time of discovery. The inspectors contacted responsible licensee personnel who promptly removed all the transient combustible material from the ISFSI exclusion area and initiated PER 318694. The licensee also performed an evaluation of the transient combustible loading for this material. This was the third occurrence identified by the inspectors of transient combustibles located in close proximity to HI-Storm casks loaded with spent fuel. The first two occurrences were on May 25, 2010 (see NCV 07200052/2010002-001, Transient Combustibles Stored Near Independent Spent Fuel Storage Facility in Excess of Amount Allowed), and on August 17, 2010 (see NOV 07200052/2010003-001, Transient Combustibles Stored Near Independent Spent Fuel Storage Facility in Excess of Amount Allowed), in both instances diesel fuel contained in vehicles left parked in close proximity to loaded HI-Storm casks was greater than the maximum allowed. According to NPG-SPP-18.4.7, Control of Transient Combustibles, the requirements and controls for handling and use of transient combustibles in proximity of the BFN ISFSI/Dry Cask Storage Pad were contained within drawings 0-47E201-1 and 0-47E201-2. In particular, drawing 0-47E201-2, ISFSI Fire Hazards Analysis Compensatory Actions, Item 11 stated that wooden structures facing the ISFSI were limited to a front face maximum height of 15 feet and a maximum width of 24 feet for a surface area total of 360 square feet, at a distance of 30 feet from the edge of the closest HI-STORM. Furthermore, General Operating Instruction (GOI) 0-GOI-300-1/ATT-12, Outside Operator Round Log, required operators to perform an inspection daily to ensure the ISFSI Pad and exclusion area were clear of the following: Flammable material such as wood, rags and plastic sheeting. If the ISFSI pad and exclusion area were not clear of these materials, then report the results to the Unit 3 Supervisor for evaluation of acceptability in accordance with drawing 0-47E201-2. Per 0-GOI-300-1/ATT-12 the ISFSI Pad exclusion area is defined as within 150 feet of the edges of the ISFSI Pad in all directions. Based upon discussion with the licensee and a review of work performed in the area, the inspectors determined that the licensee had allowed the wood cradles and cribbing to be left near a loaded HI-STORM cask for approximately one week from on or about January 26 to February 3, 2011. The licensee was performing work in the area to upright and inspect Multi Purpose Containers for the upcoming campaign. However, plant operators had not notified the Unit 3 US of the stored wooden material, and no evaluation had been performed on the acceptability of the transient combustible material as required by 0-GOI-300-1/ATT-12. Subsequent calculations by the licensee determined that the radiative heat load of the wood items was only about five percent of the allowed transient combustible loading limit. |
| Site: | Browns Ferry  |
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| Report | IR 05000259/2011002 Section 4OA5 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | TEV: Severity level IV |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Stancil E Guthrie L Pressley P Niebaum T Rossa Nielsenc Dykes C Fletcher C Stancil E Guthrie L Pressley M Coursey P Higgins P Niebaum R Hamilton R Patterson S Walker T Ross |
| INPO aspect | |
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Finding - Browns Ferry - IR 05000259/2011002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2011Q1
Self-Identified List (Browns Ferry)
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