Technical Brief

Current Severe Accident R&D Topics for Wolsong PHWR Safety in Korea

[+] Author and Article Information
YongMann Song

Severe Accident & PHWR Safety Research Division, KAERI

DongHa Kim

Severe Accident & PHWR Safety Research Division, KAERI

SooYong Park

Severe Accident & PHWR Safety Research Division, KAERI

JinHo Song

Severe Accident & PHWR Safety Research Division, KAERI

1Corresponding author.

ASME doi:10.1115/1.4035690 History: Received July 04, 2016; Revised December 23, 2016


In Korea, PHWRs account for 17% of operating units and have taken an important role in providing national energy supply. The recent biggest issue in domestic PHWR community was the continued operation of the Wolsong-1 CANDU plant, which has recently been approved to operate for 10 more years after a 30 year design life. In relation to this issue, various actions from both post-Fukushima lessons and Wolsong-1 stress test results are being taken. In KAERI R&D, the following topics are studied to support the basis for these actions. First, PHWR severe accident issues such as (1) PHTS overpressure protection capability; (2) containment overpressure protection capability and (3) bypass source term are evaluated. Second, a computer tool (called ISAAC) has been modified and updated to support analyzing Wolsong severe accident issues. Third, a decision supporting tool, called SAMEX-CANDU, has been developed to aid emergency response experts under severe accident conditions.

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