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Shenzhen nuclear plant declares war on shrimp

Hong Kong-based watchdog reports six minor incidents at Guangdong power suppliers last year, including accumulation of 3mm shrimps around water pipe at Ling Ao station

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The Daya Bay nuclear power plant in Guangdong. Photo: Corbis

Operators of a nuclear power plant in Shenzhen have surrounded water intake pipes with gill nets to prevent the accumulation of shrimp that caused a minor safety incident last year.

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The Nuclear Safety Consultative Committee, a Hong Kong-based watchdog that monitors the plants in Daya Bay and Ling Ao, reported six “below scale”(Level 0) incidents at the power stations last year, three of which occurred in a single month.

But committee chairman Dr Raymond Ho Chung-tai said the stations appeared to be “upholding excellent safety performance standards” with “key operational indices reaching internally advanced levels in recent years”.

On October 4, station staff at Ling Ao’s Unit 2 found a deviation in the reading of a water pool level monitoring sensor during a planned outage during maintenance. It was later found that staffers had incorrectly closed a valve for the water level monitoring sensor during preparation.

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Ling Ao nuclear power station in Shenzhen. Photo: Handout
Ling Ao nuclear power station in Shenzhen. Photo: Handout
On October 22, two valves in the initial cooling system were accidentally closed during periodic tests, causing a minor fluctuation in water temperature of the spent fuel pool.

On the same day, at Daya Bay Unit 1, a closed alarm used to measure nuclear reaction was not restored after fuel unloading preparations.

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