2

INES Levels
INES N/A
INES 0
INES 1
INES 2
INES 3
INES 4
INES 5
INES 6
INES 7

INES 2: Incident

Impact on People and Environment:
  • Exposure of a member of the public in excess of 10 mSv.
  • Exposure of a worker in excess of the statutory annual limits.
Impact on Radiological Barriers and Control:
  • Radiation levels in an operating area of more than 50 mSv/h.
  • Significant contamination within the facility into an area not expected by design.
Impact on Defence-in-Depth:
  • Significant failures in safety ­provisions but with no actual ­consequences.
  • Found highly radioactive sealed orphan source, device or transport package with safety provisions intact.
  • Inadequate packaging of a highly radioactive sealed source.
Javascript is required to view this map.
INES-event
INES 2

Overexposure to Radiographer

Two radiography trainees were performing industrial radiography inside a tank. The first trainee handled the guide tube of a radiography camera while the Ir-192 source was in the guide tube. The Ir-192 source contained 2553 GBq (69 curies).The first trainee was not wearing his personnel monitoring devices because he had left them in the truck. He also was not using a survey meter.

Category: Radiation Source United States of America »

INES-event
INES 2

Irradiation of a worker during an intervention using gamma ray projector

During a weld inspection operation carried out by two employees of the Welding Institute on a worksite in Pau using gamma radiography equipment , the radioactive source of the gamma ray projector jammed inside its guide tube.

Using a metal rod found on site, one of the operators managed to free the jammed source and return it to the safe position in the body of the device. During this operation, the operator was directly exposed to the radiation emitted by the radioactive source.

Category: Irradiation/Accelerators Facility France »

INES-event
INES 2

Exposure of a worker during radiographic inspections

On 18th April 2014, ASN was informed by the DCNS of an incident which occurred during the night of 17th to 18th April 2014 during radiographic inspections on the Nantes – Indret à La Montagne site. A team, consisting of an operator from the OTECMI company’s Plabennec office and an operator from the SGS Qualitest Industrie company’s Harfleur office, was carrying out radiographic inspections using a gamma ray projector containing a sealed radioactive source of iridium 192 with an activity of 1.95 TBq (terabecquerels) in one of the workshops on the DCNS site.

Category: Radiation Source France »

INES-event
INES 2

Deficiency in the determination of the uranium content of liquid waste tanks

On 26 October 2013 NRG reports that the of concentration Uranium-235 in one of the liquid waste tanks in the Molybdenum Production Facility (MPF) appears to be higher than allowed according to the license. Therefore, a criticality incident could not be excluded. The MPF has twelve storage tanks for liquid uranium-containing waste: six for highly radioactive waste and six for waste with a lower activity. The waste is temporarily stored in the tanks awaiting transport to the Dutch processor of radioactive waste, COVRA.

Category: Radioisotope Processing/Handling Facility Netherlands NRG »

INES-event
INES 2

Common cause mechanical deficiency in control rods

During an outage, on 26 September 2013, NRG reports the discovery of a deficiency in one of the six control rods of the High Flux Reactor (HFR) during an outage. Based on this discovery NRG decided to delay the restart of the reactor until the root cause and necessary measures were established and carried out. During the investigation two more control rods were found to show comparable deficiencies. The deficiencies could be traced back to an unreliable joining method of two main parts of the control rods.

Category: Research Reactor Netherlands NRG »

INES-event
INES 2

Deficiency in the determination of the uranium content of liquid waste tanks

On 17 October 2013 NRG reports that the of concentration Uranium-235 in one of the liquid waste tanks in the Molybdenum Production Facility (MPF) appears to be higher than allowed according to the license. Therefore, a criticality incident could not be excluded. The MPF has twelve storage tanks for liquid uranium-containing waste: six for highly radioactive waste and six for waste with a lower activity. The waste is temporarily stored in the tanks awaiting transport to the Dutch processor of radioactive waste, COVRA.

Category: Radioisotope Processing/Handling Facility Netherlands »

INES-event
INES 2

Overexposure to Radiographer

A lead radiographer approached the end of the guide tube having assumed that the source had already been retracted into the shielded camera. After approximately 90 seconds the assistant radiographer entered the area. The assistant radiographer’s alarming rate meter and survey meter indicated the presence of radiation and the two individuals left the area. The lead radiographer was wearing a whole body dosimetry badge which was sent for emergency processing. The dosimeter was measured by the vendor at 8.36 mSv (836 mrem).

Category: Radiation Source United States of America »

INES-event
INES 2

Overexposure of radiographers

During radiographic operations performed by two radiographers the guide tube was squashed so the Ir-192 source could not be retracted to the gamma projector. Operations were being performed at 6 m height. The operator tried to correct this situation using a plier to strainghten out the guide tube but unsuccesfully . Then the guide tube was cut and the Ir-192 source was recovered using tongs and shieldings. The workers took personnel dosimeters, alarm dosimeters and detectors but radiation protection officer was absent.

Category: Radiation Source Peru »

INES-event
INES 2

Interventional Radiology - Exceeding of the maximum regulatory annual effective dose

On 30th May 2013, ASN was informed that the passive dosimeter results for a radiation therapy technician in Saint-Eloi hospital of the Montpellier CHRU had integrated over the last quarter of 2012 an effective dose of 32 mSv. This result is higher than the regulation annual limit set at 20 millisieverts.

The hospital initially assumed malfunctioning or incorrect use of the dosimeter. Upon receipt of the incident notification, ASN then asked the hospital to investigate further and to report on the occupational physician’s conclusions.

Category: Other France »

INES-event
INES 2

Internal contamination of radiation workers during radioactive waste management

On 2nd December 2013 three radiation workers opened 4 metal drums filled with compacted radioactive wastes containing 241-Am. The purpose of opening the drums was the waste sorting and compaction of waste at higher pressure. During operation contamination occurred. The control measurements found the worker’s hands, clothing, and the waste compactor room contaminated.

Category: Radwaste Facility Hungary Waste »