NSSC approved the startup of Shin Kori unit 4

07 February 2019

South Korea's Nuclear Safety and Security Commission (NSSC) gave Korea Hydro and Nuclear Power (KHNP) permission to begin operation of unit 4 at the Shin Kori nuclear power plant.

Construction of the first pair of APR1400 reactors - Shin Kori 3 and 4 - was authorised in 2006, although the actual construction licence was not issued until April 2008.

KHNP completed cold hydrostatic testing and hot functional testing of Shin Kori 4 in November 2015 and April 2016, respectively. The company announced in August 2017 that it expected to load fuel into the unit last January, with commercial operation beginning in September.

The delay reflects slight improvements in the unit's design resulting from commissioning work carried out so far. Additional seismic assessment work has also been carried out in response to the Gyeongju earthquake in September 2016 and the Pohang earthquake in November 2017.

The NSSC approved the start up of Shin Kori 4 after considering the results of an inspection carried out by the Korea Institute of Nuclear Safety.

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