液滴エロージョンによる配管減肉事象とその対策
英字タイトル:
Pipe Wall wastage by Liquid Droplet Erosion and It's Countermeasure
著者:
奈良林 直 Tadashi NARABAYASHI 東 侑麻 Yuma HIGASHI 大森 修一 Syuichi OHMORI 手塚 健一 Kenichi TEZUKA 森 治嗣 Michitsugu MORI
発刊日:
公開日:
Annular mist flowFlow patternLiquid Drop Impingement ErosionMist flowNuclear Power Plant OperationOutage lossPlant TripTRAC codeTwo-phase flow
Pipe Wall wastage by Liquid Droplet Erosion and It's Countermeasure
著者:
奈良林 直 Tadashi NARABAYASHI 東 侑麻 Yuma HIGASHI 大森 修一 Syuichi OHMORI 手塚 健一 Kenichi TEZUKA 森 治嗣 Michitsugu MORI
発刊日:
公開日:
カテゴリ: 第6回
キーワードタグ:Annular mist flowFlow patternLiquid Drop Impingement ErosionMist flowNuclear Power Plant OperationOutage lossPlant TripTRAC codeTwo-phase flow
概要
The high level maintenance technology has become necessary to increase a capacity factor of nuclear power plants. In a nuclear power plant, There are various kinds of troubles concer ning with pipes. One of them is a small leak from a small hole by liquid drop impingement erosion (LDIE). Even such a small leak, it was sometimes a cause of the plant trip and an eco nomical losses about 200M$ during several month outage, by operating a 1000MWe fossil power plant. We conducted a LDIE test by using a test specimen fixed on a circumference of a rot ating disc, and obtained erosion rate of various liquid impingement speed. By using the TRAC code, a downstream orifice is effective to suppress LDIE by decreasing velocity in a pipe.
