e-Repository BATAN

Advanced Search

Analysis on Inadvertent Operation of Decay Heat Removal System in NuScale Reactor (Susyadia), Andi S. Ekariansyah b), Hendro Tjahjono c), D.T. Sony Tjahyanid)

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)
Subjects: Keselamatan dan Keamanan Nuklir
Divisions: Pusat Teknologi dan Keselamatan Reaktor Nuklir
Depositing User: USER PTKRN BATAN
Date Deposited: 07 Aug 2020 03:25
Last Modified: 07 Aug 2020 03:25
URI: http://repo-nkm.batan.go.id/id/eprint/9981

Actions (login required)

View Item View Item