1

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

INES 1: Anomaly

Impact on Defence-in-Depth
  • Overexposure of a member of the public in excess of statutory ­annual limits.
  • Minor problems with safety components with significant defence-in-depth remaining.
  • Low activity lost or stolen radioactive source, device or transport package.
(Arrangements for reporting minor events to the public differ from country to country. Also, it is difficult to ensure precise consistency in rating events between INES Level-1 and Below scale/Level-0)
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INES-event
INES 1

Overexposure to Radiographer

As a result of a recent inspection by the State of Oklahoma, the licensee has learned that one of their radiographers received an annual whole body dose of 58.1 mSv (5.81 rem) for calendar year 2016. The overdose was accumulated over the course of the year. There were no unusual circumstances that caused the overdose. NRC EN52693

Category: Radiation Source United States of America »

INES-event
INES 1

Stolen gamma densitometer

During the night of 13 to 14 April 2017, a gamma densitometer (Troxler 3440), which was used on a levelling work site, has been stolen from its storage location (Southern France).
It contains 2 radiation sources as follows :
1 Cesium 137 of 296 MBq activity
1 Americium/Beryllium 241 of 1480 MBq activity
Investigations are being conducted to find and recover the device.

Category: Radiation Source France »

INES-event
INES 1

Fuel fail and emission from research reactor

Fuel rods were unloaded October 17 2016, and placed in an open container in the handling compartment. The reactor was then in shutdown. On October 20th increased levels of noble gasses were detected in the filters from the handling compartment. The fuel in the handling compartment was inspected and several faults on fuel rods were detected.
These were moved to a storage container on October 24, however the container was discovered to not be leak tight. The levels of I-131 and I-132 in the Reactor hall were still increasing.

Category: Research Reactor Norway »

INES-event
INES 1

Stolen Source at Ciudad Obregon, Sonora, Mexico

On August 5th, 2016 at 06:39 (EST) a report was received from the Emergency System and therefore to CNSNS (the regulatory body) informing the theft of a Stolen Source at Ciudad Obregon, Sonora, Mexico. The device was a moisture/density gauge with Am241/Be (1.65GBq) and Cs-137 (370 MBq)

Category: Radiation Source Mexico »

INES-event
INES 1

Loss of radioactive source (Cs-137, Bac Kan, 2015)

The lost radioactive source is Cs-137 (sealed source, code number: CS-137DT, made in China) with an activity of 4,5 mCi in July, 21st 2010. The source was installed in the level gauge, used to control the clinker automatic disposal system in the cement manufacturing factory of Bắc Kạn DATC joint stock company (DATC company), at Suối Viền, Xuất Hóa ward, Bắc Kạn city. At 8.30 am in 15/12/2015, legal representative of DATC company informed that the radioactive source had been stolen via telephone.

Category: Radiation Source Vietnam »

INES-event
INES 1

Loss of radioactive source (Co-60, Pomina, 2015)

The loss of radioactive source originated from liquid steel spill accident during steel billet manufacturing process of the factory at the beginning of September, 2014. In the accident, lead layers for radioactive source protection were damaged. The radioactive source was Co-60, its activity at this time was 2,33 mCi. After the damage had been detected, the technical team had removed the box for maintenance. The technical team proposed that the source should be isolated because its safety was not ensured.

Category: Radiation Source Vietnam »

INES-event
INES 1

Loss of radioactive source (Ir-192, APAVE, 2014)

At 12 am of September 12th, 2014, in Hồ Chí Minh City, staff from APAVE Asia Pacific limited company discovered that an equipment containing a sealed Ir-192 radioactive source with the activity of 20,5 Ci had been lost). After unsuccessful attempts to retrieve the source, the Company had reported to competence agencies on the emergency. By the evening of 18/09/2016, competence agencies has found the stolen radioactive source (remained intact in the projector) after receiving information from a man living in a house nearby.

Category: Radiation Source Vietnam »

INES-event
INES 1

Loss of radioactive source (Cs-137, Song Da, 2006)

On July 28th 2006, the factory temporary stopped production for equipment maintenance. On 30/07/2006, the radioactive source box is removed from the manufacturing line and put in a inox container with a layer of lead lining before putting on a cement pedestal for clinker disposal. The Cs-137 source's activity is 10 mCi. This was a sealed radioactive source, put in an protective lead box. The box's dimension was 100x100x120mm. In 8/8/2016, the company detected that radioactive source was loss. Despite best effort from relevant agencies, the source has not been found.

Category: Radiation Source Vietnam »

INES-event
INES 1

Loss and dispersion of radioactive source (Eu-152, 2006)

On May 29th, 2006, the Eu-152 radioactive source with an activity of 25 mCi at 10/1995 was lost when being kept at a temporary storage facility. At this moment, the factory was under repairment. At 10h30 of May 31st, 2006, the police office informed that the the radioactive might be kept at No 628, Bạch Đằng street, Hai Bà Trưng district, Hà Nội (an garbage collection area), The radioactive source container had been broken, causing contamination to the house.

Category: Radiation Source Vietnam »

INES-event
INES 1

Loss of a device containing radioactive sources

On the 25th of August 2016 the lack of two density gauges containing a category 5 radioactive source each (Am-241 activities 240 MBq and 185 MBq) was discovered at a former barite mining facility. The gauges were not in use and were to be disposed of. The gauges were supposedly stolen but the exact date of the theft is not known due to the licensee’s lack of proper documentation. There is no evidence of possible exposure of individuals.

Category: Radiation Source Poland »