Click here to load reader

JAEA-Technology 2012-032 ... JAEA-Technology 日本原子力研究開発機構 November 2012 Japan Atomic Energy Agency JAEA-Technology 2012-032 高温工学試験研究炉(HTTR)の

  • View
    1

  • Download
    0

Embed Size (px)

Text of JAEA-Technology 2012-032 ... JAEA-Technology 日本原子力研究開発機構 November 2012 Japan...

  • JA EA

    -Technology

    日本原子力研究開発機構

    November 2012

    Japan Atomic Energy Agency

    JAEA-Technology

    2012-032

    高温工学試験研究炉(HTTR)の 使用済広領域中性子検出器の動作不能調査

    -サンプル試験及び破壊試験-

    Investigation on Cause of Malfunction of Wide Range Monitor (WRM)

    in High Temperature engineering Test Reactor (HTTR)

    -Sample Tests and Destructive Tests-

    篠原 正憲 茂木 利弘 齋藤 賢司 芳賀 広行 佐々木 新治 勝山 幸三 高田 清志 東村 圭祐 藤井 淳一 鵜飼 隆由 森口 勇介

    Masanori SHINOHARA, Toshihiro MOTEGI, Kenji SAITO, Hiroyuki HAGA Shinji SASAKI, Kozo KATSUYAMA, Kiyoshi TAKADA, Keisuke HIGASHIMURA Junichi FUJII, Takayuki UKAI and Yusuke MORIGUCHI

    大洗研究開発センター 高温工学試験研究炉部

    Department of HTTR Oarai Research and Development Center

    JA EA

    -Technology 2012-032

    高 温 工 学 試 験 研 究 炉 ( H T T R ) の 使 用 済 広 領 域 中 性 子 検 出 器 の 動 作 不 能 調 査  ︱ サ ン プ ル 試 験 及 び 破 壊 試 験 ︱

    日 本 原 子 力 研 究 開 発 機 構

  • 本レポートは独立行政法人日本原子力研究開発機構が不定期に発行する成果報告書です。 本レポートの入手並びに著作権利用に関するお問い合わせは、下記あてにお問い合わせ下さい。 なお、本レポートの全文は日本原子力研究開発機構ホームページ(http://www.jaea.go.jp) より発信されています。

    独立行政法人日本原子力研究開発機構 研究技術情報部 研究技術情報課 〒319-1195 茨城県那珂郡東海村白方白根 2 番地 4 電話 029-282-6387, Fax 029-282-5920, E-mail:[email protected]

    This report is issued irregularly by Japan Atomic Energy Agency Inquiries about availability and/or copyright of this report should be addressed to Intellectual Resources Section, Intellectual Resources Department, Japan Atomic Energy Agency 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195 Japan Tel +81-29-282-6387, Fax +81-29-282-5920, E-mail:[email protected]

    © Japan Atomic Energy Agency, 2012

  • i

    JAEA-Technology 2012-032

    高温工学試験研究炉(HTTR)の使用済広領域中性子検出器の動作不能調査 -サンプル試験及び破壊試験-

    日本原子力研究開発機構大洗研究開発センター

    高温工学試験研究炉部

    篠原 正憲・茂木 利弘+1・齋藤 賢司

    芳賀 広行※・佐々木 新治+2・勝山 幸三+2

    高田 清志*1・東村 圭祐*1・藤井 淳一*1・鵜飼 隆由*1・森口 勇介*1

    (2012 年 8 月 29 日受理)

    2010 年 3 月の原子炉停止中に、広領域中性子検出器(WRM)が開発時の動作実績期間より短

    い使用時間で動作不能となる事象が発生した。本事象の原因調査を行い、WRM の寿命を向上さ

    せることは高温ガス炉の基盤技術開発において重要である。そこで、動作不能箇所の特定及び破

    損原因を調査するため、製作メーカにて WRM 模擬試験体を製作し、組立に起因する強度低下及

    び熱サイクルによる強度低下試験並びに照射燃料集合体試験施設(FMF)にて WRM の破壊試験

    を実施した。

    本報告書は、WRM の動作不能の原因調査及び破壊試験結果をまとめたものである。

    大洗研究開発センター:〒311-1393 茨城県東茨城郡大洗町成田町 4002

    +1安全統括部

    +2燃料材料試験部

    *1 三菱電機株式会社

    ※ 技術開発協力員(燃料材料試験部)

    i

  • ii

    JAEA-Technology 2012-032

    Investigation on Cause of Malfunction of Wide Range Monitor (WRM) in High Temperature engineering Test Reactor (HTTR)

    -Sample Tests and Destructive Tests-

    Masanori SHINOHARA, Toshihiro MOTEGI+1, Kenji SAITO, Hiroyuki HAGA※, Shinji SASAKI+2, Kozo KATSUYAMA+2,

    Kiyoshi TAKADA*1, Keisuke HIGASHIMURA*1, Junichi FUJII*1, Takayuki UKAI*1 and Yusuke MORIGUCHI*1

    Department of HTTR

    Oarai Research and Development Center Japan Atomic Energy Agency

    Oarai-machi, Higashiibaraki-gun, Ibaraki-ken

    (Received August 29, 2012)

    An event, in which one of WRMs were disabled to detect the neutron flux in the reactor core, occurred during the period of reactor shut down of HTTR in March, 2010. The actual life time of WRM was unexpectedly shorter than the past developed life time. Investigation of the cause of the outage of WRM toward the recovery of the life time up to the past developed life is one of the issues to develop the technology basis of High Temperature Gas cooled Reactor (HTGR).

    Then, two experimental investigations were carried out to reveal the cause of the malfunction by specifying the damaged part causing the event in the WRM. One is an experiment using a mock-up sample test which strength degradation at assembly process and heat cycle to specify the damaged part in the WRM. The other is a destructive test in Fuels Monitoring Facility (FMF) to specify the damaged part in the WRM.

    This report summarized the results of the destructive test and the experimental investigation using the mock-up to reveal the cause of malfunction of WRM. Keywords: HTTR, FMF, Wide Range Monitor, Post Irradiation Examination, Destructive Test +1 Safety Administration Department +2 Fuels and Materials Department *1 Mitsubishi Electric Corporation ※ Collaborating Engineer

    ii iii

    JAEA-Technology 2012-032

  • ii

    JAEA-Technology 2012-032

    Investigation on Cause of Malfunction of Wide Range Monitor (WRM) in High Temperature engineering Test Reactor (HTTR)

    -Sample Tests and Destructive Tests-

    Masanori SHINOHARA, Toshihiro MOTEGI+1, Kenji SAITO, Hiroyuki HAGA※, Shinji SASAKI+2, Kozo KATSUYAMA+2,

    Kiyoshi TAKADA*1, Keisuke HIGASHIMURA*1, Junichi FUJII*1, Takayuki UKAI*1 and Yusuke MORIGUCHI*1

    Department of HTTR

    Oarai Research and Development Center Japan Atomic Energy Agency

    Oarai-machi, Higashiibaraki-gun, Ibaraki-ken

    (Received August 29, 2012)

    An event, in which one of WRMs were disabled to detect the neutron flux in the reactor core, occurred during the period of reactor shut down of HTTR in March, 2010. The actual life time of WRM was unexpectedly shorter than the past developed life time. Investigation of the cause of the outage of WRM toward the recovery of the life time up to the past developed life is one of the issues to develop the technology basis of High Temperature Gas cooled Reactor (HTGR).

    Then, two experimental investigations were carried out to reveal the cause of the malfunction by specifying the damaged part causing the event in the WRM. One is an experiment using a mock-up sample test which strength degradation at assembly process and heat cycle to specify the damaged part in the WRM. The other is a destructive test in Fuels Monitoring Facility (FMF) to specify the damaged part in the WRM.

    This report summarized the results of the destructive test and the experimental investigation using the mock-up to reveal the cause of malfunction of WRM. Keywords: HTTR, FMF, Wide Range Monitor, Post Irradiation Examination, Destructive Test +1 Safety Administration Department +2 Fuels and Materials Department *1 Mitsubishi Electric Corporation ※ Collaborating Engineer

    JAEA-Technology 2012-032

    iii

    目次

    1. 緒言 ········································································································ 1

    2. 高温工学試験研究炉(HTTR)の中性子計装 ·················································· 3

    2.1 概要 ···································································································· 3

    2.2 WRM の耐熱構造 ·················································································· 3

    3. 広領域中性子検出器(WRM)のサンプル試験 ················································ 5

    3.1 目的 ····································································································· 5

    3.2 試験方法 ······························································································· 5

    3.3 検証項目 ········································