ENS 45407: Difference between revisions
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| event date = 10/02/2009 13:30 PDT | | event date = 10/02/2009 13:30 PDT | ||
| last update date = 10/02/2009 | | last update date = 10/02/2009 | ||
| title = 24 Hour Report | | title = 24 Hour Report on Process Exhaust Hepa Filter Damage | ||
| event text = At approximately 1330 hours on 10/1/09 during a follow-up investigation of an event which occurred at mid-day on 9/27/09, conditions were discovered that may have met the criteria for reporting in accordance with 10 CFR 70.50.b.2. | | event text = At approximately 1330 hours on 10/1/09 during a follow-up investigation of an event which occurred at mid-day on 9/27/09, conditions were discovered that may have met the criteria for reporting in accordance with 10 CFR 70.50.b.2. | ||
The incinerator was shutdown on 9/25/09 in preparation for performing dioctyl sebacate (DOS) efficiency testing on 9/27/09 of the final HEPA filters in K50 Solid Waste Uranium Recovery (SWUR) exhaust gas treatment system. At approximately noon that Sunday, an event occurred that, in hindsight, was a probable fire in the packed column scrubber in the exhaust gas treatment system. This event was terminated in a timely fashion by reinitiating water flow to the packed column. Indications of high heat and possible fire in the packed column included high temperatures and observed 'smoke' from mechanical flanges on the downstream ducting of the packed column. Subsequent to the observed high heat event in the packed column, high temperatures of the downstream north HEPA housing (in-service) were observed. The high temperatures in the HEPA housing were believed to be from the high heat event in the packed column. The continuous airborne effluent sample for the K50 stack (downstream of HEPA filters) was counted to evaluated whether a release had occurred. The results of the sample were at the low end of the normal range for this stack, indicating no active release had occurred. | The incinerator was shutdown on 9/25/09 in preparation for performing dioctyl sebacate (DOS) efficiency testing on 9/27/09 of the final HEPA filters in K50 Solid Waste Uranium Recovery (SWUR) exhaust gas treatment system. At approximately noon that Sunday, an event occurred that, in hindsight, was a probable fire in the packed column scrubber in the exhaust gas treatment system. This event was terminated in a timely fashion by reinitiating water flow to the packed column. Indications of high heat and possible fire in the packed column included high temperatures and observed 'smoke' from mechanical flanges on the downstream ducting of the packed column. Subsequent to the observed high heat event in the packed column, high temperatures of the downstream north HEPA housing (in-service) were observed. The high temperatures in the HEPA housing were believed to be from the high heat event in the packed column. The continuous airborne effluent sample for the K50 stack (downstream of HEPA filters) was counted to evaluated whether a release had occurred. The results of the sample were at the low end of the normal range for this stack, indicating no active release had occurred. | ||
Revision as of 21:11, 1 March 2018
| Where | |
|---|---|
| Areva Np Inc Richland Richland, Washington (NRC Region 2) | |
| License number: | Snm-1227 |
| Reporting | |
| 10 CFR 70.50(b)(2) | |
| Time - Person (Reporting Time:+-3.27 h-0.136 days <br />-0.0195 weeks <br />-0.00448 months <br />) | |
| Opened: | Robert Link 17:14 Oct 2, 2009 |
| NRC Officer: | Charles Teal |
| Last Updated: | Oct 2, 2009 |
| 45407 - NRC Website | |