ENS 46284: Difference between revisions

v t e ENS Event
17:41 Sep 27, 2010
Title	Unusual Buildup of Material in Aluminum Centrifuge Area
Event Description	During the unloading of centrifuges in the Building 333 U-Aluminum centrifuge area, a crusty buildup of material (~1/8" thick) was observed on the inside of the centrifuge 'jacket' that contains the centrifuge bowl. The buildup was also observed on the underside of the centrifuge lid ('cake pan'). This level of material buildup was unusual and had not been previously observed. It should be noted that some dusting or spattering had been previously observed. The system is designed with drains on the bottom that are designed to prevent the accumulation of liquid within the centrifuge 'jacket'. There is also a requirement to inspect the 'jacket' when solution is observed draining from the overflows. This was considered an unanalyzed or improperly analyzed condition because the mechanism for buildup of this extent was not considered in the safety analysis (i.e. there was no indication of buildup provided by the overflows). The following corrective actions were taken: 1) operations in the affected area were suspended; 2) the area was posted to maintain the integrity of the as-found conditions; 3) the area was inspected by safety personnel; 4) the issue was entered into the internal Problem Identification, Resolution, and Correction System (PIRCS); 5) an Unusual Incident Evaluation was performed; 6) calculations were performed with bounding conditions; 7) photographs were taken of the equipment; 8) the system was scanned to determine U-235 mass (~46 grams U-235); 9) material samples were taken and delivered to the laboratory for analysis; and 10) an investigation has been initiated. There were no control or control system failures. There were no actual or potential safety consequences to workers, the public, or the environment. No degradations or failures have been identified. The system is currently in a safe and stable condition. An investigation has been initiated. The licensee has notified the NRC Resident Inspector.

ENS 46284 +/-
Where
Nuclear Fuel Services Inc. Erwin, Tennessee (NRC Region 2)
License number:	SNM-124
Reporting

Part 70 App A (B)(1)
Time - Person (Reporting Time:+19.15 h0.798 days <br />0.114 weeks <br />0.0262 months <br />)
Opened:	Randy Shackelford 12:50 Sep 28, 2010
NRC Officer:	John Knoke
Last Updated:	Sep 28, 2010
46284 - NRC Website
v • d • e

v t e Emergency Notification System
Nuclear Fuel Services Inc. with Part 70 App A (B)(1)
WEEKMONTHYEAR2014-10-29T07:00:00 [Table view]
[ENS list for Nuclear Fuel Services Inc.]

@@ Line 3: / Line 3: @@
 | facility = Nuclear Fuel Services Inc.
 | Organization =
-| license number = Snm-124
+| license number = SNM-124
 | region = 2
 | state = Tennessee

ENS 46284: Difference between revisions

Latest revision as of 18:22, 24 November 2018

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ENS 46284: Difference between revisions

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