A Small-Sized HTGR System Design for Multiple Heat Applications for Developing Countries

Abstract

Japan Atomic Energy Agency has conducted a conceptual design of a 50 MWt small-sized high temperature gas cooled reactor (HTGR) for multiple heat applications, named HTR50S, with the reactor outlet coolant temperature of 750°C and 900°C. It is first-of-a-kind of the commercial plant or a demonstration plant of a small-sized HTGR system to be deployed in developing countries in the 2020s. The design concept of HTR50S is to satisfy the user requirements for multipurpose heat applications such as the district heating and process heat supply based on the steam turbine system and the demonstration of the power generation by helium gas turbine and the hydrogen production using the water splitting iodine-sulfur process, to upgrade its performance compared to that of HTTR without significant R&D utilizing the knowledge obtained by the HTTR design and operation, and to fulfill the high level of safety by utilizing the inherent features of HTGR and a passive decay heat removal system. The evaluation of technical feasibility shows that all design targets were satisfied by the design of each system and the preliminary safety analysis. This paper describes the conceptual design and the preliminary safety analysis of HTR50S.

Development plan of high burnup fuel for high temperature gas-cooled reactors in future

“…The maximum irradiation temperature of CFPs in the HTR50S would be rather higher than the irradiation temperature of 1323 ± 100 K. For example, the maximum irradiation temperature (estimated conservatively) of CFPs in the first core of the HTR50S was estimated to be 1740 K [11].…”

“…The core of the HTR50S will be upgraded to the core in phase II after phase I [11]. The outlet coolant temperature will be increased to 1173 K [11] in phase II.…”

“…The maximum fuel temperature was estimated to be 1740 K [11], which is only 28 K lower than the criteria of the maximum fuel temperature (1768 K [11]), in the first core of the HTR50S, nevertheless the outlet temperature is 150 K lower than that of the core of the HTR50S in phase II [11]. Therefore, the following subjects (1) and/or (2) are needed to complete the draft of the nuclear/thermal design of the core, at least.…”

“…The major specifications of the HTR50S were determined and targets of the technology demonstration using the HTR50S (e.g., increasing the burnup) were identified [9]. The specifications of the CFPs and the fuel compacts, used in the HTR50S core at the first step of phase I (the first core of the HTR50S), are the same as those used in the HTTR [11]. No R&D is needed for the CFPs and the fuel compacts of the first core of C 2014 Atomic Energy Society of Japan.…”

Estimasi Pengaruh Desalinasi Terhadap Temperatur Umpan Pembangkit Uap RDE

“…HTR-10 dengan kapasitas 10 MWt merupakan contoh reaktor tipe HTGR daya rendah yang berhasil dioperasikan di Cina [4]. Sementara itu, reaktor dengan daya kecil dapat mereduksi capital cost sehingga cocok untuk negara berkembang [5].…”