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- Material Type
- 規格・テクニカルリポート類
- Author/Editor
- 川原 啓孝礒崎 和則石井 貴之市毛 聡野瀬 正一坂場 秀男仲井 悟
- Publication Date
- 2004-06
- Publication Date (W3CDTF)
- 2004
- Alternative Title
- MK-III Function Tests in JOYO; Dump Heat Exchanger (DHX)
- Periodical title
- JNC TN9410 2004-016
- Target Audience
- 一般
- Note (General)
- 出版タイプ： NA主冷却機に関係する総合機能試験は、2001年8月27日から2001年9月13日の間で実施した。主たる試験結果は、以下のとおりである。(1)主送風機の空気風量は、インレットベーン開度50\%で設計定格風量 7,700 m3/min以上、インレットベーン全開で設計定格風量の約130\%であった。これは、空気流路の圧力損失が設計値に対して小さかったためである。(2)出入ロダンパ全開、インレットベーン全開状態での主送風機の空気風量は、設計定格風量の約 5\%であった。(3)主送風機停止時の特性として、インレットベーン全閉までの時間は4基平均で 7.9sec、主送風機回転数が0になるまでの時間は4基平均で 8.7secであった。また、風量遅れ時間は、4基とも回転数の低下から約 1secであり、設計時における熱過渡解析で用いた 5secに対して保守側であった。 (4)主送風機運転中における騒音は、インレットベーン開度25\%が最も大きく、主送風機周りで約100dBであった。なお、周辺監視区域境界では、50dBであり、茨城県の条例基準(工業地域第4種区域)を満足していることを確認した。 (5)MK-IIIでは、インレットベーン及び入ロダンパドライブユニットは大型となったが、アキュームレータタンクは、圧縮空気喪失事象が発生した場合でも設計容量以上であることを確認した。A key part of the upgrade of the experimental fast reactor JOYO to the MK-III design was the replacement of the dump heat exchangers. MK-III function tests (SKS-1) of the new dump heat exchangers were carried out from August 27,2001 through September 13,2001. The major results of the function tests of the dump heat exchangers were as follows: (1) Air flow of the main blower with an inlet vane opening of 50\% was confirmed to exceed the design rated flow of 7,700m3/min. It was also demonstrated that an inlet vane opening of 100\% provides about 130\% of the design rated flow. This is because the new DHX flow route has more low pressure loss than the design value. (2) Tests of the air flow of the main blower demonstrated that with a fully opened inlet damper a full opened outlet damper and an inlet vane opening of O\% provides about 5\% of the design rated flow. (3) Free flow coast down characteristics of the main blower achieved an inlet vane O\% opening in an average of 7.9 seconds. Revolutions per minute of the main blower reached zero in an average of 8.7 seconds. The delay time from the opening of the vacuum contact breaker to the air flow decrease was approximately 1 second. This was a more conservative value than the 5 seconds assumed in design thermal transient analyses. (4) The loudest noise occurred with the main blower operating with a 25\% inlet vane opening. At that time, the noise around the main blower was approximately 100dB, and in the surrounding monitoring area boundary, the noise was 50dB. This was confirmed to be within the standard of the Ibaraki prefectural ordinance. (5) Although the MK-III inlet vane and inlet damper drive unit was bigger than the MK-II unit, the accumulator tank was confirmed to provide sufficient volume during a compression air loss event.
- Source
- /JNC-TN9410-2004-016.pdf （fulltext）