Speaker
Ming Sun
(Institute of Nuclear Energy Safety Technology)
Description
Fusion reactor is one of new type reactors being developed , and it is cleaner and more efficient than the fission reactor. Each SSCs (Structures, Systems, Components) has different safety importance to fusion reactors. So it is necessary to classify the SSCs of fusion reactors. And the safety classification of SSCs for fusion reactor is the important basis of reactor design and construction. Now the safety classification of SSCs for reactors is too conservative and it can not identify all the important SSCs for fission and fusion reactors. Probabilistic safety assessment (PSA, the frequently-used PSA codes i.e. RiskA) is one of the important tools to evaluate whether the reactor is safety or not. The importance and sensitivity of SSCs can be calculated by PSA. And the PSA method can be used to identify whether the SSCs is important or not according to the numerical value of importance and sensitivity. A new safety classification approach for fusion reactors is proposed in this paper, in which PSA method is incorporated.
The PSA should be performed and the importance and sensitivity of the SSCs can be obtained according to the results of PSA. The value of importance and sensitivity reflects the importance degree for SSCs from different angles, and a sequence of the SSCs can be performed according to the numerical value of importance and sensitivity. The numerical value will be different from fission reactors to distinguish the safety class SSCs and non-safety class SSCs. The SSCs can be classified according to the sequence of the SSCs，and it should be more rational to consider the classification from the engineering experience. Through the above process, the final safety classification is obtained from probabilistic point, and this method is called probabilistic safety classification. This safety classification reflects the importance of SSCs from the probabilistic points.
Co-authors
Fang Wang
(Institute of Nuclear Energy Safety Technology, CAS·FDS Team, No.350, Shushanhu Road, Hefei, Anhui, China)
Jiaqun Wang
(Institute of Nuclear Energy Safety Technology, CAS·FDS Team, No.350, Shushanhu Road, Hefei, Anhui, China)
Jin Wang
(Institute of Nuclear Energy Safety Technology, CAS·FDS Team, No.350, Shushanhu Road, Hefei, Anhui, China)
Ming Sun
(Institute of Nuclear Energy Safety Technology, CAS·FDS Team, No.350, Shushanhu Road, Hefei, Anhui, China)
Shanqi Chen
(Institute of Nuclear Energy Safety Technology, CAS·FDS Team, No.350, Shushanhu Road, Hefei, Anhui, China)
