ENS 44761
ENS Event | |
|---|---|
18:30 Jan 9, 2009 | |
| Title | During Testing, a Specialty Fuels Facility Furnance Failed to Shutdown When Required |
| Event Description | A furnace in the Specialty Fuels Facility (SFF) was being tested in order to return it to operation. As part of the test, the airflow for the ventilation was checked to ensure that if the airflow decreased to a level below what was required per the Integrated Safety Analysis (ISA), then the appropriate furnace systems would automatically shutdown. During the test with hydrogen gas flowing into the furnace and therefore the ventilation system, the shutdown sequence shutdown the hydrogen flow when the flow was at 100%, but it did not shutdown the hydrogen flow when the flow was at 8%. There was no immediate risk or threat to the safety of workers or the public as a result of this event.
An evaluation is currently being performed. BWXT is making this 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> report in accordance with 10 CFR 70.61, Appendix A (b)(1) - 'Any event or condition that results in the facility being in a state that was not analyzed, was improperly analyzed, or is different from that analyzed in the Integrated Safety Analysis, and which results in failure to meet the performance requirements of 70.61.' The furnace is shutdown pending further investigation. The licensee will notify the NRC Resident Inspector.
On January 9, 2009 BWXT made event notification#44761 regarding a furnace in the Specialty Fuels Facility (SFF) which failed to perform the shutdown sequence for a given hydrogen flow level required per the Integrated Safety Analysis (ISA). The furnace was shutdown pending further investigation. As a result of the ongoing investigation supplemental information to this notification is being provided. In reviewing the programming code for the furnace a note was detected related to the flow of Carbon Monoxide (CO). Specifically, the note allowed for the continuation of the flow of CO if the temperature in the furnace was above 1000 C. Simulation testing of the validity of this note was performed and the test proved that the gas would continue to flow until the temperature of the furnace reached a level below 1000 C. An evaluation is currently being performed. The furnace continues to be shutdown pending further investigation. The licensee informed the NRC Resident Inspector. Notified R2DO(Rudisail), NMSS EO(Davis), and Fuels Group via e-mail. |
| Where | |
|---|---|
| Bwx Technologies, Inc. Lynchburg, Virginia (NRC Region 2) | |
| License number: | SNM-42 |
| Reporting | |
| Part 70 App A (B)(1) | |
| Time - Person (Reporting Time:+-1.07 h-0.0446 days <br />-0.00637 weeks <br />-0.00147 months <br />) | |
| Opened: | Barry Cole 17:26 Jan 9, 2009 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Jan 14, 2009 |
| 44761 - NRC Website | |
Bwx Technologies, Inc. with Part 70 App A (B)(1) | |
WEEKMONTHYEARENS 536122018-09-17T04:00:00017 September 2018 04:00:00
[Table view]Part 70 App A (B)(1) Unanalyzed Condition ENS 447612009-01-09T18:30:0009 January 2009 18:30:00 Part 70 App A (B)(1) During Testing, a Specialty Fuels Facility Furnance Failed to Shutdown When Required ENS 439832008-02-13T14:30:00013 February 2008 14:30:00 Part 70 App A (B)(1) 24 Hour Report Concerning Improperly Analyzed Condition Related to Integrated Safety Analysis 2018-09-17T04:00:00 | |