もんじゅプラント動特性解析コードの整備(6) (蒸気発生器モデルの開発・整備(2))

The maintenance of MONJU plant dynamic characteristics analytic code (6); The development maintenance of the steam generator model (2)

宮川 明 ; 宮下 誠*

Miyakawa, Akira; not registered

もんじゅでは、蒸気発生器の内部ナトリウム温度、伝熱管や給水配管内部の減圧沸騰挙動等、試験では実測できない特性を詳細に評価するため、また蒸気発生器急速ブローダウン時の様な急激な過度変化を安定的に解くことを目的とし、蒸気発生器モデルの整備を進めてきた。本書では1995年12月1日にタービンでの故障を想定し、設計通りに安全にプラントが停止することを確認した(プラントトリップ)試験結果を基に、これまで開発・整備を進めてきた蒸気発生器モデルを使用し、改良前にサーベイした解析結果と実機試験との相違の検討を行い、改良が加えられた解析コードを利用し、再解析を行い実機試験データとの比較検討を実施した結果を報告するものである。尚、現在でもプラント動特性解析コードの整備は進められており、プラントトリップ試験再現解析結果については、その結果順次報告していくと共に、モデル構造、入出力環境に変更があった場合も順次報告していく。

The action of the pressure descent inside the pipe which transmits the inside sodium temperature of the steam occurrencevessel, heat in MONJU, and the water pipe and seething and others, in the examination, to evaluate the character which can't be measured in detail and it aimed at untying an again rapid change like the time of the rapid blow going down of the steam occurrencevessel in the stable target, and the maintenance of the steam occurrencevessel model had been advanced. In this calligraphy, as a (PLANT TRIP) examination result that it was confirmed that a trouble with the turbine was presumed on December 1, 1995 and a plant stopped safely as the design and the examination of the difference from the analytic result which did a survey before the improvement, and the actual opportunity examination is done by using the steam occurrence vessel model that development maintenance has been advanced to this and the analytic code which improvement is added to is used, and a re-analysis is done, and the result that a comparative examination with the actual opportunity examination data was carried out is reported. And, the maintenance of the plant movement characteristic analytic code is advanced even at present, as for PLANT TRIP examination reappearance analytic result, the result is reported one after another, then, it is reported one after another when there is a change in the model structure, the input and output environment.