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CASE STUDY - 4 CASTING LIGHT ON THE SITUATION


SITUATION: INSTALLING LIGHT INCIDENT: NET CHAFE RESPONSE: RISK ASSESSMENT AND TRAINING


The situation


Very often an incident in fi sh farming – as in all walks of life – is caused by a number of issues coming together. It is common practice at many sites to install lighting in the pen at certain times of the year. Although suspending a light in a pen sounds relatively innocu- ous, the unfortunate affects of several related issues led to a breach of con- tainment on this occasion.


The incident


The light itself was found to have caused a hole in the net from chafe on a protruding bolt.


The light contained two anodes. These smooth metallic protrusions are bolted on to the light and are designed to wear away with use. Unfortunately, one of the anodes had worn down to a greater extent than had been realised, thereby exposing the securing bolt, which snagged the net. This incident brings together inspec- tion, maintenance and deployment. The


light had been suspended at too deep a depth, meaning that it could come in to contact with the net. And, the need for maintenance had not been identifi ed in time.


THE RESPONSE


This has been addressed by the company through training and procedures as well as through the risk assessment process. The company noted that more pieces of equip- ment are placed within the pens, as fish farming has become more sophisticated over recent years, and therefore protection against the potential for chafe remains a high priority.


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