Wolsung (South Korea)

Map of Wolsung

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PHWR 650 constructed by AECL , grid connection in 1982; 1 PHWR under construction

Facilities in Wolsung

plantreactor typconstruction startoperation startshut down
Wolsung-1CANDU 630 (PHWR)19771982
Wolsung-3CANDU 630 (PHWR)19941998
Wolsung-4CANDU 630 (PHWR)19941999

Westinghouse signed Korean contracts valued at more than $350-mil to provide components, instrumentation and control equipment, and technical and engineering support services to four power reactors to be built in South Korea at two sites, Shin-Kori and Shin-Wolsong, through 2010-11.
The plants are Korea Standard Nuclear Plant Plus design, based on Westinghouse System 80 technology. The projects have a cumulative value in excess of $6-bil, Westinghouse said today. The vendor said the contracts are with Doosan Heavy Industries & Construction Company Inc and the Korea Power Engineering Inc. The plants will be owned and operated by the Korea Hydro & Nuclear Power Co (KHNP), a Korea Electric Power Corp subsidiary. KHNP will be responsible for overall project management of licensing, procurement and construction, as well as plant startup and operations.


An inquiry has been launched in South Korea after 22 workers at a nuclear plant were exposed to radiation after a coolant leak.

The accident at the Wolsung plant, south-east of Seoul, happened at 7pm local time (1000GMT) on Monday during maintenance and safety checks, the Science and Technology Ministry said. The nuclear reactors were not in operation at the time.

Ministry officials said the exposure - the first-ever case of group contamination in South Korea - was "not that severe".
"All those exposed to radiation have now turned out to be safe," a ministry spokesman said. "None of them were hospitalised."

About 45 litres of so-called "heavy water" leaked, the ministry said. "It did not leak outside of the building. It did not affect the environment," the ministry said in the statement.
(source: http://news.bbc.co.uk/2/hi/asia-pacific/465858.stm)


Radioactive water leaked inside a South Korean nuclear power plant during repair work on Monday evening, exposing 22 workers to small amounts of radiation, the Government said today.
About 12 gallons of heavy water leaked during the accident at a nuclear plant in Wolsung, 190 miles southeast of the capital, Seoul, the Science and Technology Ministry said in a statement.

It said the radioactive water had been contained inside the plant and had not escaped into the environment.

Those exposed to radiation in Korea were employees of the state Korea Electric Power Corp., which operates three nuclear reactors in Wolsung. The Canadian-designed reactors use heavy water to generate electricity.
(New York Times Oct 6, 1999)


Korea Electric Power Corp. declared Wolsong-3 in commercial operation on July 1.
The project has taken 69 months, said vendor Atomic Energy of Canada Ltd. (AECL), with unit 2 put in service last year and unit 4 scheduled to follow this time next year. The 700-MW-class Candu-6 is Kepco´s 13th nuclear reactor.


Unit has operated at 75-80% capacity since it went into operation in 1982. Because of its good performance AECL-Kepco partnership is looking to Candu's expansion both in Korea and in the Pacific Rim.. AECL has proposeed a 900 MW Candu-9 for Wolsung, based on the 900 MW units at Bruce and Darlington.
Moreover AECL & Korea work on the possibilities to burn spent PWR fuel in the Candu reactors.


Canadian nuclear industry has completed 80% of its one major program, the 900 million $ Wolsung project in Korea.:
Unit-2 is scheduled to be in service by June 1997; The calandria is moved in the reactor building of unit-3 and into Wolsung-4 in May 1996. Units 3 & 4 are expected to come into service in 1998 and 1999.
AECL & its Canadian subcontractors are responsible for engineering of the NSSS in all units. Korean industry will supply 40% of the overall content of Wolsung-2 and 50% of unit-3 & 4. Korean industry is virtually self-sufficient in PWR technology but has not yeat absorbed all PHWR technology.


Heavy water leak due to a valve failure ( 6,5 t run to the sump). Operators allowed the plant to stay at operating pressure and caused the leakage to last 2 hours. Valve failure was the same which caused the leak in Pickering in December 1994.


1 of the 380 pressure tubes developed a crack -> leakage of 2 tons of heavy water from the RCS. About the half were lost. The unit seems to have suffered repeated problems, including malfunction of the moisture seperator and heavy water leakage due to valve malfunctioning.