GUILLOTINE BREAKS OF FW LINES AT LOVIISA 440

机译：LOVIISA 440的几条生产线的豆胶断裂

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The Loviisa Nuclear Power Plant owned by Fortum (by IVO until 1998) consists of two VVER 440 units dating back to the late 70s and the early '80s. A control programme was developed in 1982-1983 to manage erosion corrosion in the secondary system piping and components. The scope of the control programme was enlarged after the Surry accident in 1986 but still the control programme was based on the operation experience and two-phase flow conditions. Due to shortcomings of the control programme, the guillotine pipe break of the feed water system piping occurred in 1990 at Unit 1. Erosion corrosion adjacent to the flow control orifice in the feed water discharge line was incorrectly assumed to be lower than in other during the previous outages inspected fittings (tees, 90 degree elbows, throttles, etc.). However, in spite of the large efforts put on the improving the inspection programme the second guillotine pipe break of the feed water system occurred in 1993 at Unit 2. In order to diminish erosion corrosion of the feed water system piping secondary water chemistry was changed from neutral to alkaline water chemistry in 1994 at Unit 2 and in 1995 at Unit 1, respectively. Also change of larger extent of carbon steel piping to low alloy or stainless steel piping has been carried out.

机译：Fortum拥有的Loviisa核电站（由IVO收购，直到1998年）由两个VVER 440机组组成，其历史可追溯到70年代末和80年代初。 1982-1983年制定了一个控制程序，以管理二次系统管道和组件中的腐蚀腐蚀。 1986年萨里（Surry）事故发生后，控制程序的范围有所扩大，但该控制程序仍基于操作经验和两相流动条件。由于控制程序的缺陷，给水系统管道的断头台管道断裂发生在1990年的1号机组。错误地认为，给水排放管道中流量控制孔附近的腐蚀腐蚀低于其他情况。先前的停机检查过的配件（三通，90度弯头，节流阀等）。然而，尽管付出了巨大的努力来改进检查程序，但给水系统的第二个断头台管道破裂还是在1993年发生在2号机组上。为了减少给水系统管道的腐蚀腐蚀，将二次化学改为分别于1994年在第2单元和1995年在第1单元进行中性到碱性水化学反应。另外，已经进行了将更大范围的碳钢管道改变为低合金或不锈钢管道的改变。

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来源
《Material Degradation and Related Managerial Issues at Nuclear Power Plants》|2005年|P.39-47|共9页
会议地点 Vienna(AT)
作者
O. Hietanen;
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作者单位

Fortum Nuclear Services Ltd, FORTUM, Finland;

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原文格式 PDF
正文语种 eng
中图分类核电厂（核电站）;
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专利

1. Automatic loading pattern optimization tool for Loviisa VVER-440 reactors [J] . J. Kuopanportti Kerntechnik . 2013,第4期

机译：Loviisa VVER-440反应堆的自动加载模式优化工具
2. BNFL contracts for Loviisa reloads;TVEL still supplies most VVER-440s [J] . Ariane Sains, Ann MacLachlan, Pearl Marshall Platts Nuclear Fuel . 2003,第23期

机译：BNFL的Loviisa重装合同； TVEL仍提供大多数VVER-440
3. Validation of coupled neutron kinetic/thermal- hydraulic codes. Part : Analysis of a VVER-440 transient (Loviisa-1) [J] . A. Hamalainen, R. Kyrki-Rajamaki, S. Mittag Annals of nuclear energy . 2002,第3期

机译：验证中子动力学/热力-水力耦合代码。部分：VVER-440瞬态分析（Loviisa-1）
4. GUILLOTINE BREAKS OF FW LINES AT LOVIISA 440 [C] . O. Hietanen, International Atomic Energy Agency(IAEA) Technical Meeting on Material Degradation and Related Managerial Issues at Nuclear Power Plants . 2006

机译：Goviisa 440的断头台休息FW线路
5. Ice shedding from overhead electrical lines by mechanical breaking: A ductile model for viscoplastic behaviour of atmospheric ice. [D] . Eskandarian, Mojtaba. 2005

机译：机械断裂从架空电线上脱落的冰：大气冰的粘塑性行为的延性模型。
6. Serines 440 and 467 in the Werner syndrome protein are phosphorylated by DNA-PK and affects its dynamics in response to DNA double strand breaks [O] . Rika Kusumoto-Matsuo, Deblina Ghosh, Parimal Karmakar, 2014

机译：Werner综合征蛋白中的丝氨酸440和467被DNA-PK磷酸化并影响其动力学以响应DNA双链断裂
7. Table 2: Effect of different levels of Cu (µmol L−1) on Chlorophyll a (mg g−1 FW), chlorophyll b (mg g−1 FW), total Chlorophyll (mg g−1 FW) and carotenoids (mg g−1 FW) on H. cannabinus seedlings. [O] . -1

机译：表2：不同水平的Cu（μmolL-1）对叶绿素A（Mg G-1 FW），叶绿素B（Mg G-1 FW），总叶绿素（Mg G-1 FW）和类胡萝卜素（Mg G. -1 fw）在H. cannabinus幼苗。

GUILLOTINE BREAKS OF FW LINES AT LOVIISA 440

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