著者

坂場 成昭 大橋 弘史 佐藤 博之 原 輝夫 加藤 竜馬 國富 一彦

出版者

Atomic Energy Society of Japan

雑誌

日本原子力学会和文論文誌 (ISSN:13472879)

巻号頁・発行日

vol.7, no.3, pp.242-256, 2008 (Released:2012-03-02)

参考文献数

30

被引用文献数

6 6

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Nuclear hydrogen production is necessary in an anticipated hydrogen society that demands a massive quantity of hydrogen without economic disadvantage. Japan Atomic Energy Agency (JAEA) has launched the conceptual design study of a hydrogen production system with a near-term plan to connect it to Japan's first high-temperature gas-cooled reactor HTTR. The candidate hydrogen production system is based on the thermochemical water-splitting iodine sulphur (IS) process. The heat of 10 MWth at approximately 900°C, which can be provided by the secondary helium from the intermediate heat exchanger of the HTTR, is the energy input to the hydrogen production system. In this paper, we describe the recent progresses made in the conceptual design of advanced process heat exchangers of the HTTR-IS hydrogen production system. A new concept of sulphuric acid decomposer is proposed. This involves the integration of three separate functions of sulphuric acid decomposer, sulphur trioxide decomposer, and process heat exchanger. A new mixer-settler type of Bunsen reactor is also designed. This integrates three separate functions of Bunsen reactor, phase separator, and pump. The new concepts are expected to result in improved economics through construction and operation cost reductions because the number of process equipment and complicated connections between the equipment has been substantially reduced.

著者

坂場 成昭 佐藤 博之 大橋 弘史 西原 哲夫 國富 一彦

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会 年会・大会予稿集

巻号頁・発行日

vol.2007, pp.262, 2007

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原子力機構では、HTTRに接続させる熱化学水素製造法ISプロセスの設計研究を進めている。商用段階における経済性向上のためには、HTTRに接続するISプロセスを一般化学プラントの規格基準を用いて非原子力級にて設計、製作、管理することが重要である。本報では、非原子力級化に必要となるR&D項目について述べる。

著者

濱本 真平 坂場 成昭 竹田 陽一

出版者

Atomic Energy Society of Japan

雑誌

日本原子力学会和文論文誌 = Transactions of the Atomic Energy Society of Japan (ISSN:13472879)

巻号頁・発行日

vol.9, no.2, pp.174-182, 2010-06-01

被引用文献数

1

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It is important to control the chemistry of the helium coolant used in high-temperature gas-cooled reactors (HTGRs). The effect of a decarburizing environment on the creep rupture properties tends to decrease the creep rupture life of the heat-resistant alloy used in heat exchangers. In this paper, we describe an active control method for the concentration of impurities using the existing helium purification system, which consists of a helium heater, a copper oxide trap (CuOT), a molecular sieve trap, a cold charcoal trap, and a bypass line. Analysis showed that the efficiency control of CuOT is effective in improving the decarburizing atmosphere. The efficiency control of CuOT increases the concentrations of carbon monoxide and hydrogen. It was found that both the enrichment of carbon monoxide suggested in previous studies and the enrichment of hydrogen are also effective in forming the carburizing atmosphere.<br>