ML23166B069
| ML23166B069 | |
| Person / Time | |
|---|---|
| Site: | 07003103 |
| Issue date: | 06/15/2023 |
| From: | Louisiana Energy Services |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML23166B067 | List: |
| References | |
| LES-23-071-NRC, EN 56484 | |
| Download: ML23166B069 (1) | |
Text
LES-23-034-NRC Page 3 of 6 60 Day Report for EN 56484 Crane Swing Controls Not Established 10 CFR 70.50(c)(1)
(i) Caller's name, position title, and call-back telephone number; x
The individual who facilitated Event Notification 56484 was Jim Rickman, Senior Licensing Specialist. The call-back telephone number is 575-394-6558.
(ii) Date, time, and exact location of the event; x
The event occurred at 1345 MT on April 21, 2023. The location of this event was south of SBM 1003 at Urenco USA in Eunice, New Mexico (Lea County).
(iii) Description of the event; On April 21, 2023 a telescopic crane was brought on site and positioned South of SBM 1003/1005, near the Northwest corner of the USM. At approximately 1202, this crane was used to move counterweights without a physically established IROFS50f no swing zone or having IROFS50f and IROFS50g spotters in place.
(A) Radiological or chemical hazards involved, including isotopes, quantities, and chemical and physical form of any material released; x
There were no radiological or chemical hazards involved or released.
(B) Actual or potential health and safety consequences to the workers, the public, and the environment, including relevant chemical and radiation data for actual personnel exposures to radiation or radioactive materials or hazardous chemicals produced from licensed materials (e.g., level of radiation exposure, concentration of chemicals, and duration of exposure);
x There were no actual or potential health and safety consequences to workers, the public, or the environment. No unexpected exposure to radioactive materials or hazardous chemicals produced from licensed materials occurred.
x Plant instrumentation detected no release during the event.
x No contamination events occurred; therefore, no decontamination was necessary.
x No dose alarms or dose rate alarms occurred during the response.
(C) The sequence of occurrences leading to the event, including degradation or failure of structures, systems, equipment, components, and activities of personnel relied on to prevent potential accidents or mitigate their consequences; and
LES-23-034-NRC Page 4 of 6 x
On April 21 at 0724, work was authorized to bring a mobile crane into
the Controlled Access Area and set it up for use. The work was
preparatory to install chillers for a cascade cooling water system.
x At 1107, the crane entered the CAA and travelled to the intended
location south of SBM 1003 and SBM 1005. Spotters controlled the
movement as required by UUSA procedures.
x At approximately 1155, with the crane in position, the concrete
barriers were placed to prevent crane movement and the spotters
were released.
x At approximately 1202, the crane crew began using the crane to
install the counterweights. The IROFS50f/g swing zone controls were
not in place.
x At 1310, installation of the counterweights was completed and the
crane key was delivered to the control room.
x At 1345, the Shift Manager discussed the evolution with DSHHU and the lack of swing zone controls was identified.
(D) Whether the remaining structures, systems, equipment, components, and activities of personnel relied on to prevent potential accidents or mitigate their consequences are available and reliable to perform their function; x
UUSA stopped work involving IROFS50a/b/c/f/g/h and stopped work activities that use Projects contractor oversite. Some, but not all of these activities were restarted after the management team determined the administrative safety controls were available and reliable to perform their function.
(iv) External conditions affecting the event; x
There were no external conditions affecting this event.
(v) Additional actions taken by the licensee in response to the event; x
Work using the crane was stopped.
x Work involving IROFS50a/b/c/f/g/h was stopped.
x Work was stopped for activities that use Projects contractor oversite.
x The event was entered into the Corrective Action Program as EV160170.
(vi) Status of the event (e.g., whether the event is on-going or was terminated);
x The event has been terminated.
LES-23-034-NRC Page 5 of 6 (vii) Current and planned site status, including any declared emergency class; x
The site is functional for uranium enrichment. Some activities involving the use of large vehicles is prohibited due to self-imposed limitations.
x A root cause evaluation has been performed and approved by the Event Review Board.
(viii) Notifications, related to the event, that were made or are planned to any local, State, or other Federal agencies; x
The NRC was initially notified on April 21, 2023. Updated reports were provided on April 22, 2023 and April 25, 2023. No other notifications were made or are planned to other government agencies.
(ix) Status of any press releases, related to the event, that were made or are planned.
x No press releases were made and no press releases are planned.
LL The probable cause of the event, including all factors that contributed to the event
and the manufacturer and model number (if applicable) of any equipment that failed or
malfunctioned; x
The cause of this event is the implementing documents for IROFS50f/g
lack the level of detail necessary to meet the Integrated Safety Analysis
requirements to control crane movement near areas of concern.
LLL Corrective actions taken or planned to prevent occurrence of similar or identical
events in the future and the results of any evaluations or assessments; and x
Work that involves IROFS50a/b/c//h has been restarted.
x Corrective actions are planned to revise the implementing documents to
clearly identify the actions needed to implement the Integrated Safety
Analysis requirements. Additional corrective actions include training and
improving the work control process.
LY For licensees subject to Subpart H of this part, whether the event was identified and
evaluated in the Integrated Safety Analysis.
x The accident sequence for OC4-1, External Cranes is that a cranes load
impacts an area of concern. The impact LVDVVXPHGWRresult in damage and asubsequent UF6 releaseZKLFKLVDOVRDVVXPHGDQGWREHDKLJK
FRQVHTXHQFH. IROFS50f and IROFS50g prevents thisaccident sequence.