ENS 53445

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v t e ENS Event
06:00 Jun 5, 2018
Title	En Revision Imported Date 7/12/2018
Event Description	EN Revision Text: UNANALYZED CONDITION RESULTING FROM INCORRECT IMPLEMENTATION OF ITEMS RELIED ON FOR SAFETY (IROFS) Appendix A to 10 CFR 70 (b)(1) An incorrect implementation of IROFS36c (Limit Cylinder Mover to Electric or Diesel with less than 280L [74 gallons] Fuel Load) has been identified as having occurred for feed deliveries into the Cylinder Receipt and Dispatch Building (CRDB). IROFS36c requires that UF6 transporters/movers inside CRDB truck bays utilize a tractor which has a limited fuel capacity of less than 74 gallons. This requires the Over the Road (OTR) tractor truck to disconnect the trailer in a designated staging area and a local tractor with a fuel tank capacity less than 74 gallons be utilized with the OTR trailers. Methods were used allowing an OTR truck trailer to access the CRDB with the OTR tractor and fuel tanks of the vehicle remaining outside. Activities involving OTR tractor trailers entering the CRDB truck bay in this manner have not been evaluated in the ISA. 10 CFR 70.50 (c)(iii) (A) There was not a material release, no radiological or chemical hazards were present. (B) No exposure occurred (C) A condition exists which resulted in the facility being in a state that was different from that analyzed in the Integrated Safety Analysis. The method for cylinder transport into the CRDB truck bay by an OTR tractor, in proximity to cylinders inside the CRDB, has not been specifically evaluated as the evaluated condition prohibited the use of vehicles with fuel capacities in excess of 74 gallons within the CRDB truck bay. The only piece of equipment which entered the CRDB was the OTR trailer; the tractor remained connected and outside the CRDB. (D) IROFS36c remains available and reliable to perform its safety function. The identified deficiency only affects OTR tractors that could potentially expose UF6 cylinders in the CRDB to fuel sources greater than 74 gallons. UUSA [Urenco USA] has issued a stop work to prevent the introduction of excessive fuel capable of causing a release of UF6 inventory in the area of concern should a fire occur. The capabilities of existing IROFS are sufficient to meet the performance requirements of 10 CFR 70.61. (iv) No external conditions affect this event. (v) A stop work was issued to prevent the access of OTR tractor trucks to the CRDB where proximity to UF6 cylinders could occur. (vi) An event did not occur at UUSA. UUSA remains in a safe and stable condition. (vii) Current and planned site status is normal. No emergencies have been or will be declared. (viii) No local, state, or federal agencies will be notified. (ix) No press releases will occur. Condition has been entered into the UUSA Corrective Action Program. Event Record 125051. The licensee will notify R2 (Lopez). * * RETRACTION ON 07/11/2018 AT 1534 EST FROM BLAKE BIXENMAN TO STEVEN VITTO * * * EN53445, made June 5th, 2018, reported a condition in accordance with Appendix A to 10 CFR 70 (b)(1) in which the facility was in a state different from that analyzed in the Integrated Safety Analysis, and which resulted in failure to meet the performance requirements of 10 CFR 70.61. This report was prompted by an incorrect implementation of IROFS36c (Limit Cylinder Mover to Electric or Diesel with <280L Fuel Load) during feed deliveries into the Cylinder Receipt and Dispatch Building (CRDB). An Over the Road (OTR) tractor containing greater than the maximum allowable fuel load was permitted access the CRDB Truck Bay with the OTR truck trailer. At the time of the report, this method for cylinder transport into the CRDB Truck Bay by an Over the Road (OTR) tractor in proximity to cylinders inside the CRDB had not been evaluated. URENCO USA conservatively assumed a failure in the performance requirements of 10 CFR 70.61 at the time of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> report. Since the time of the initial report, URENCO USA has completed an assessment of safety significance for the events reported in EN53445. With detailed results documented in the UUSA corrective action program, Event Record EV125051, the following conclusion has been made: The fuel delivery events using the OTR truck into the CRDB can be categorized as events with low safety significance since they would not result in breached/ruptures of UF6 cylinders and no uranic material would be released in the event of a fire involving UF6 cylinders in the CRDB Truck Bay. This correlates with a low consequence event. Based on calculations shown in the 'Assessment of Safety Significance for Events Documented in EV125051', the conditions reported in EN53445 did not result in failure to meet the performance requirements of 10 CFR 70.61. Therefore, the condition reported in EN53445 did not exceed the criteria which would necessitate an event be reported to the NRC. URENCO USA hereby retracts Event Notification 53445. Notified R2DO(Rose), Fuels Group, and NMSS Events Notification email.

ENS 53445 +/- *RETRACTED*
Where
Louisiana Energy Services Eunice, New Mexico (NRC Region 2)
License number:	SNM-2010
Reporting

Part 70 App A (B)(1)
Time - Person (Reporting Time:+33.8 h1.408 days <br />0.201 weeks <br />0.0463 months <br />)
Opened:	Blake Bixenman 15:48 Jun 6, 2018
NRC Officer:	Dong Hwa Park Property "NRC officer" (as page type) with input value "Dong Hwa Park " contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
Last Updated:	Jul 11, 2018
53445 - NRC Website
v • d • e

v t e Emergency Notification System
Louisiana Energy Services with Part 70 App A (B)(1)
WEEKMONTHYEAR2025-07-26T19:48:00 [Table view]
[ENS list for Louisiana Energy Services]

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