Susyadi Susyadi, SS and Andi Sofrany Ekariansyah, ASE and Hendro Tjahjono, HT and D. T. Sony Tjahyani, DTST (2019) Analysis on Inadvertent Operation of Decay Heat Removal System in NuScale Reactor (Susyadia), Andi S. Ekariansyah b), Hendro Tjahjono c), D.T. Sony Tjahyanid). In: ICONets 2019 Universitas Andalas Padang Sumatera Barat, 18 September 2019, Universitas ANDALAS Fakultas Teknik Padang Sumatera Barat.
Full text not available from this repository.Abstract
Abstract. Analysis on inadvertent operation of decay heat removal system in NuScale reactor has been carried out
through numerical simulations using the RELAP5 code. The model used includes primary system, secondary system,
decay heat removal system (DHRS) and water pool. Simulation begins with an opening of single DHRS train isolation
valve when reactor runs at nominal power. The valve opening causes part of feed water bypasses the steam generator so
heat removal from primary system reduces. This causes reactor coolant temperature to increase to set point trip of 294 K
within 1236 seconds. Following the trip, another DHRS valve opens and the feed water and steam isolation valves close.
Besides, the coolant temperature and flow rate drop significantly and then gradually increase to reach a new balance in
natural circulation. Decay heat removal is performed by combination of steam generator and DHRS units afterward. At
the later stage, the simulation shows that after 764 seconds of reactor trip, the temperature and pressure in the primary
system tends to decrease which shows that the DHRS capable to remove decay heat from the primary system and
maintain safe shutdown. Hence, inadvertent DHRS operation does not threaten the safety of reactor.
Keywords: inadvertent, DHRS, NuScale, RELAP5, Simulation
Item Type: | Conference or Workshop Item (Paper) |
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Subjects: | Taksonomi BATAN > Keselamatan dan Keamanan Nuklir Taksonomi BATAN > Keselamatan dan Keamanan Nuklir |
Divisions: | BATAN > Pusat Teknologi dan Keselamatan Reaktor Nuklir IPTEK > BATAN > Pusat Teknologi dan Keselamatan Reaktor Nuklir |
Depositing User: | Iskandar Alisyahbana Adnan |
Date Deposited: | 07 Aug 2020 03:25 |
Last Modified: | 30 May 2022 08:40 |
URI: | https://karya.brin.go.id/id/eprint/9981 |