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김상헌,김경호,선종오,조영갑,정택형,김정현,이관희,Kim, Sanghaun,Kim, Gyeong-Ho,Sun, Jong-Oh,Cho, Yeong-Garp,Jung, Taeck-Hyung,Kim, Jung-Hyun,Lee, Kwan-Hee 한국압력기기공학회 2016 한국압력기기공학회 논문집 Vol.12 No.1
The Second Shutdown Drive Mechanism (SSDM) provides an alternate and independent means of reactor shutdown. The Second Shutdown Rods (SSRs) of SSDMs are poised at the top of the core by the hydraulic force driven from a hydraulic system during normal operation. The rods drop by gravity when a trip is commended by a Reactor Protection System, Alternate Protection System, Automatic Seismic Trip System or operator by means of power off solenoid valves of hydraulic system. This paper describes the test results of seismic qualification of a prototype SSDM hydraulic system to demonstrate that its structural integrity and operability (functionality) are maintained during and after seismic excitations, that is, an adequacy of the SSDM design. From the results, this paper shows that the SSDM hydraulic system satisfies all its design requirements without any malfunctions during and after seismic excitations.
김상헌(Sanghaun Kim),김경호(Gyeong-Ho Kim),선종오(Jongoh Sun),조영갑(Yeong-Garp Cho),김정현(Jung-Hyun Kim),정택형(Taeck-Hyung Jung),이관희(Kwan-Hee Lee) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
The reactivity control mechanisms of Jordan Research and Training Reactor (JRTR) with 5MW power (10MW upgradable) with plate type fuels, which has been designed and fabricated through KAERI and DAEWOO consortium project, consist of four Control Rod Drive Mechanisms (CRDMs) driven by an individual step motor and two Second Shutdown Drive Mechanisms (SSDMs) driven by an individual hydraulic system. The SSDM provides an alternate and independent means of reactor shutdown. The Second Shutdown Rods (SSRs) in SSDMs are poised at the top of the core by the hydraulic force during normal operation. The rods drop by gravity when a trip is commended by a Reactor Protection System. This paper describes the qualification test results of seismic structural integrity and drop performance of a prototype SSDM to verify that the structural integrity and operability (functionality) of SSDM are maintained during and after seismic excitations, that is, an adequacy of the SSDM design. From the results, this paper shows that the SSDM satisfies all design requirements without any malfunctions during and after seismic excitations.