1. The Defendants jointly committed against the Plaintiff KRW 354,233,706 and KRW 164,978,790 among them, from July 29, 2015, and July 71.

1. Basic facts

A. Status 1 of the parties concerned) The Plaintiff is the Industrial Accident Compensation Insurance Act (hereinafter “Industrial Accident Insurance Act”).

(2) The Defendant Korea Atomic Energy Co., Ltd. entered into a contract with the insurer and the insured under the Industrial Accident Insurance Act (hereinafter “instant contract”) on March 7, 2007 with a corporation established for the purpose of development and related business, etc., as a special corporation established by the Minister of Employment and Labor to carry out the industrial accident compensation insurance business in order to promptly and fairly compensate workers for occupational accidents by implementing the industrial accident compensation insurance business (hereinafter “the industrial accident compensation insurance business”). The Defendant Korea Atomic Energy Co., Ltd. entered into a contract with C Co., Ltd., D Co., Ltd., and E Co., Ltd. to contract the construction period of G and H’s main facilities with the construction period from April 1, 2007 to May 31, 2016 (hereinafter “instant contract”).

C Co., Ltd and D Co., Ltd. entered into a contract with J and D Co., Ltd. on September 21, 2014 for the safety surveillance team service on the following date: (a) from September 15, 2010 to March 31, 2015; (b) the construction period of the pipe gate gate gate gate gate gate gate gate from March 15, 2010 to March 31, 2015; and (c) the construction amount was KRW 23,278,396,90.

3) Defendant A is a person in charge of preventive inspection of devices, such as operation, valves, etc. in relation to nuclear reactors by the director of the L Team of Defendant C C C C C C C. Defendant B is a person in charge of the maintenance and repair of mechanical devices, such as valves, etc. as a team agent. Defendant B is a person in charge of the maintenance and repair of valves, etc.

(hereinafter referred to as “the network” in combination with the network N, networkO, and network P. B.

The water was leaked through valves at the R valve room located 9.7 meters under the ground of the instant building (hereinafter “the instant valve room”). As a result, the network N during the safety patrol around December 26, 2014, around 09:53.