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INES-event
INES 2

Radiation Overexposure of an Industrial Radiographer

An industrial radiographer received radiation doses to his whole body and extremity that were in excess of regulatory limits. On September 9, 2003, an industrial radiographer and a radiographer's assistant conducted radiography operations and they were unknowingly exposed to radiation when a 0.762 TBq (20.6 Ci) iridium-192 source did not properly return to its shielded position. The equipment involved was Technical Operations (currently Sentinel), Model 660B radiography device containing 20.6 curies of iridium-192.

Category: Other United States of America »

INES-event
INES 2

FAILURE OF FIXED GAUGING DEVICE RESULTING IN RADIATION EXPOSURE TO MEMBERS OF THE PUBLIC

Members of the public (facility workers) received radiation exposures due to a loss of control of a 37 GBq (1Ci) Cs-137 source that came out of a damaged Berthold level gauge (model LB 7442). The gauge was damaged on June 29, 2003, causing the source to come out of its shield and fall to the floor. An employee picked up the gauge's handle mechanism, including the attached source, carried it to an individual's office and placed it on the individual's desk. The source remained on the individual's desk until discovery on July 10, 2003.

Category: Other United States of America »

INES-event
INES 1

Loss of an industrial radiography device containing 138 GBq of iridium 192

An industrial gamma radiography exposure device containing an iridium-192 radiography source of activity 138 GBq was reportedly stolen from an authorised source storage facility. The incident reportedly occurred in the early hours of April 12, 2003. The absence of the device was noticed early in the morning of April 12, 2003 when the radiography personnel reported for work. The drive cable and guide tube of the device had already been removed by the authorized user preparatory to sending the device to Mumbai for recharging it with a fresh source.

Category: Other India »

INES-event
INES 2

Internal contamination of workers in a Medical Center

On November 28, 2002 a technician of the Nuclear Medicine Department of the Medical Center “Centro Médico Siglo XXI” reported to the National Commission on Nuclear Safety and Safeguards - CNSNS (Mexico’s nuclear regulatory body) that he and eight of his co-workers were contaminated with I-131. The technician became aware of the problem because radiation alarms activated while his co-workers were around. The nine workers were checked with a whole body counter at the regulatory body’s laboratory, and the results verified the internal contamination of the workers.

Category: Other Mexico »

INES-event
INES 3

High radiation levels measured on a package containing Iridium-192

The Swedish Radiation Protection Authority (SSI) was the 3 of January 2002 notifyed by the US Depatment of Transportation that a package containing 366 TBq of iridium-192 had been discovered with high radiation levels. The level of radiation on one side of the package is 4 mSv/h on 25 meters distance and on the other side 0,01 mSv/h on 5 meters distance. The iridium was produced at Studsvik research reactor and was transported in a certified Type-B container. The container was transported by airplane to Paris and from there to New Orleans USA.

Category: Other Sweden »

INES-event
INES 2

Over exposure of a worker while performing radiography

On 24th July 2002, a worker received radiation exposure of 151 mSv while performing radiography works in the turbine auxiliary systems, outside the reactor building of Madras Atomic Power Station. The worker is a certified radiographer and also a qualified radiation worker. He got exposure when he was removing the exposed film and installing the new film. The exposure took place because he did not retract the source into the shielded remote operable camera, prior to this job. The camera used in the incident contained Ir-192 source, of estimated strength of 5 Curies.

Category: Other India »

INES-event
INES 1

Release of iodine-131 from 131 production plant of nuclear chemistry division Pakistan Institute of Nuclear Science and Technology

On August 5, 20 and 21, unusual high activity up to 2203 Bq/m3 was reported by the Health Physics surveyor in the I-131 plant room during routine air sampling. Investigations revealed that the ventilation of the building was shut down during off-working hours. Due to the closure of exhaust/ventilation system, the negative pressure in I-131 cell was lost and the pressure in the cell became in equilibrium with room pressure, thereby by un-utilized Iodine-131 vapors in the fume hoods diffused and escaped the cell causing spread of radioactivity in the plant room.

Category: Other Pakistan »

INES-event
INES 1

Water leak into a hot cell at the Studsvik research establishment

Water leaked into a hot cell from a pipe carrying water. The amount of water on the floor exceeded the permitted value. Inside the cell were pieces of fuel pins waiting for examination. The water was removed with a vacuum cleaner. No radiation exposure of personnel occurred.
Justification:
Degradation of defence in depth with an initiator
Safety function availability: full
Initiator frequency/probability: medium/possible

Category: Other Sweden »

INES-event
INES 2

Over-exposure of one worker during the industrial radiography activities

On 24 July 1996 an Ir-142 radioactive source used for industrial radiography and weld test was lost in the site of Gilan Combined Cycle Power Plant. Two hours later it was found by the safety authorities of the site and placed in its shield immediately. During the said time period a worker who had not observed safety measures, was exposed to a dose, exceeding annual dose limit (INES Level 2). He is now under full health care. The site safety authorities and the inspectors of AEOI took all necessary safety measures.

Category: Other Iran »

INES-event
INES 3

Two occupational workers were injured by exposure of electron accelerator

Two occupational workers, Mr. Qiao and Wang were injured by exposure of high frequency-high voltage electron accelerator during its commission in Tianjin electrical wire factory. The energy of the accelerator is 2.5 MeV. Its cooling water tank under Ti window was needed to change cooling water pipe. On 21 November 1995, while the accelerator has high voltage, but no electron beam was provided, five workers entered the irradiation hall to change cooling water pipe for 7-8 minutes. They did not wear personal dosimeter. Two of them were exposed by electron beam which caused skin burns.

Category: Other China »