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.
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INES-event
INES 2

Loss of shutdown cooling due to station blackout during refueling outage

On February 9, 2012, during a refueling outage, loss of off-site power (LOOP) occurred and emergency diesel generator (EDG) 'B' failed to start while EDG 'A' was out of service for scheduled maintenance, resulting in a station blackout (SBO). Off-site power was restored 12 minutes after the SBO condition began.
The LOOP was caused by a human error during a protective relay test of the main generator. The EDG 'B' failing to start was caused by the failure of the EDG air start system.

Category: Power Reactor South Korea »

INES-event
INES 2

Failure of the reactor component cooling water system and others by tsunami

Unit 2 of the Onagawa Nuclear Power Station started operation since 14:00 on March 11, and the Tohoku District – Off the Pacific Ocean Earthquake occurred at 14:46 on the same day. The reactor was automatically stopped and emergency diesel generator A (EDG (A)), emergency diesel generator B (EDG (B)), and high-pressure core-spray diesel generator (EDG (H)) automatically started.

Category: Power Reactor Japan »

INES-event
INES 2

Overexposure of a worker in a lead foundry

In a lead foundry, a foundryman extracted lead by heating from a shielding heads of a radiotherapeutic unit. Before the lead extraction he dismantled the heads not knowing that inside one of them was a radioactive source left. Than he carried out a tube with the source. The tube with the source was left in the room. The following day (10th January) morning, the foundryman continued the work preparing for the lead extraction (for about 2 hours).

Category: Other Czech Republic »

INES-event
INES 2

Level 2 incident on INES scale concerning a pipe nonconformity in two Cattenom NPP fuel storage pools

On 18 January 2012, Cattenom's operator (EDF) notified ASN that the absence of a \siphon breaker\ orifice on the fuel storage pools of reactors 2 and 3 had been detected during an inspection performed by EDF teams.

Category: Power Reactor France »

INES-event
INES 2

Extremity Overexposure to Radiation Worker

One of the licensee's cyclotron operators received an extremity acute overexposure of 530 mSv (53.01 rem) to the right finger during the month of September as a result of cyclotron operations. The acute exposure brought the individual's total extremity exposure to 690 mSv (69 rem) for the year. The Regulatory Authority for this cyclotron, the State of Kansas, is continuing their investigation of the incident.

Category: Irradiation/Accelerators Facility United States of America »

INES-event
INES 2

Over Exposure to Radiographer

The licensee radiography crew believed they had retracted the source back into the body of the radiography camera. They then approached the pipe. One radiographer noticed that an indicator on the camera suggested the source was actually not fully retracted into the body of the camera. The radiographers' survey meters registered a zero reading; however, one radiographer's digital rate meter was alarming. One of the radiographers turned one crank on the camera, and that is when the source became fully retracted.

Category: Other United States of America »

INES-event
INES 2

Overexposure to Radiographer

The licensee-radiographer, climbed a ladder to remove the guide tube from an SA Model 880 radiography camera, which contained a 1.8 TBq (49.3 curie) Ir-192 source. The radiography camera was suspended by a rope. As he did this, another employee walked by and noticed that the survey meter, which was on the ground, had pegged off scale. He communicated this to the radiographer on the ladder who then realized the source was not retracted into the camera, but was still in the guide tube. He then climbed down the ladder and retracted the source.

Category: Radiation Source United States of America »

INES-event
INES 2

Overexposure to Radiation Workers

During loading of a 44.8 TBq (1210 curie) Co-60 source into an industrial irradiator at the licensee's New Jersey facility, approximately 10 cm of the 20 cm source somehow became dislodged for approximately 25 to 30 seconds, exposing two service personnel (radiation workers) and a radiation safety officer (RSO) the licensee had employed under reciprocity using a Pennsylvania license. The service personnel were working under the supervision and direction of the Pennsylvania licensee. The insertion tool prevented the workers from re-inserting the dislodged source quickly.

Category: Irradiation/Accelerators Facility United States of America »

INES-event
INES 2

Contamination of workers during inspection

During the annual inspection of the fissile material inventory by members from EURATOM and IAEA, a recipient containing a small amount of plutonium fell on the floor, causing a contamination of the room and part of the adjacent rooms. Three people - the 2 inspectors from EURATOM and IAEA and 1 worker from Belgoprocess- have been contaminated by the incident.

Category: Belgium »

INES-event
INES 2

Stolen Radiography Camera

The dark room on a licensee's truck parked at a hotel in Austin, TX, was broken into during the night, and the container with a QSA Global model 880 D radiography camera containing 33.7 Ci of Ir-192 (IAEA Category 2 source), along with the guide tube and crank cables and a portable electric generator, was stolen. The local law enforcement agency (LLEA) was contacted and responded to the scene. Search for the source is continuing. The State of Texas issued a Press Release and the licensee issued a reward see http://www.dshs.state.tx.us/news/releases/20110719a.shtm.

Category: Radiation Source United States of America »