针对核电冷源取水安全的海流特征分析
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摘要
冷源取水安全是核电安全运行的重要环节,并受到多种外海堵塞物的巨大威胁。为有效指导冷源取水堵塞物的防治工作,本文对取水口周围小区域的实测海流数据进行分析。分析发现,受取水影响,取水口附近海域的海流分别为准定常流特征、非规则潮流特征和潮流特征。准定常流区基本分布在取水湾内,且在取水湾口的西南部100 m范围内有延伸分布。非规则潮流区分布在取水湾口外侧,半径约为50 m的区域。距离取水口300 m外的海域基本为潮流特征,受取水影响较小。同时,外海的余流流向为平行岸线的SW向,而取水湾内的余流受取水影响,指向取水口方向,且流速较大。取水湾口的余流较小,受潮流和取水的共同影响。距离取水口300 m范围内的海域,有指向取水口的余流净输运,是防治堵塞物的重点区域。
The water intake of cold resource is an important part of the safety for nuclear power station,and it could be threatened by different blockages from the open sea. In order to prevent the blockage,this paper makes an analysis on the ocean current data of a small area near the water intake. Bases on the analysis,there are different types of ocean current near the water intake,such as semi-stable current,irregular tidal current and tidal current. The semi-stable current mainly distributes in the inlet of water intake,and there is an extension of 100 m in the south-west of the inlet. With a radius of 50 m,the irregular tidal current area locates in the outside of the inlet. The tidal current area is about 300 m outside the water intake. The residual current in the open sea is parallel with the coastal line whose direction is southwest. The velocity of residual current in the inlet of water intake is bigger than in the open sea because of the water intake. The residual current which is influenced by the tide and water intake is small near the mouth of the inlet. With a distance of 300 m to the mouth of inlet,there is a net transport of residual current pointing to the water intake. The net transport of residual current area is vital to the blockage preventing.
The water intake of cold resource is an important part of the safety for nuclear power station,and it could be threatened by different blockages from the open sea. In order to prevent the blockage,this paper makes an analysis on the ocean current data of a small area near the water intake. Bases on the analysis,there are different types of ocean current near the water intake,such as semi-stable current,irregular tidal current and tidal current. The semi-stable current mainly distributes in the inlet of water intake,and there is an extension of 100 m in the south-west of the inlet. With a radius of 50 m,the irregular tidal current area locates in the outside of the inlet. The tidal current area is about 300 m outside the water intake. The residual current in the open sea is parallel with the coastal line whose direction is southwest. The velocity of residual current in the inlet of water intake is bigger than in the open sea because of the water intake. The residual current which is influenced by the tide and water intake is small near the mouth of the inlet. With a distance of 300 m to the mouth of inlet,there is a net transport of residual current pointing to the water intake. The net transport of residual current area is vital to the blockage preventing.
引文
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[15]Jiang W,Feng S.3D analytical solution to the tidally induced Lagrangian residual current equations in a narrow bay[J].Ocean Dynamics,2014,64(8):1073-1091.
[2]金亚飚.关于钢铁工业海水直接利用的技术探讨[J].环境科学与管理,2009,34(10):64-67,72.
[3]颜国呈,吕文婷.基于电厂取水外来物堵塞的预防管理[J].科技创新与应用,2016(14):119.
[4]SHI W Q,YUAN S,XU N,et al.Analysis of floe velocity characteristics in small-scaled zone in offshore waters in the eastern coast of Liaodong Bay[J].Cold Regions Science and Technology,2016,126:82-89.
[5]Susiati H,Mellawati J.PEMETAAN SEBARAN SUBSTRATSEDIMEN DASAR PERAIRAN PESISIR DI SEMENANJUNGMURIA KABUPATEN JEPARA[J].Jurnal Pengembangan Energi Nuklir,2013,15(1):55-62.
[6]陈锋.中国滨海核电厂取水明渠口门布置原则[J].核安全,2009(2):25-29,34.
[7]刘诗华,侯树强.寒区核电厂取水口防冰设施设计研究[J].人民黄河,2015,37(5):112-115.
[8]阮国萍.核电厂取水口堵塞原因分析与应对策略[J].核动力工程,2015,36(S1):151-154.
[9]MAES J,TURNPENNY A W H,LAMBERT D R,et al.Field evaluation of a sound system to reduce estuarine fish intake rates at a power plant cooling water inlet[J].Journal of Fish Biology,2004,64(4):938-946,doi:10.1111/j.1095-8649.2004.00360.x.
[10]蔡体菁,秦素娣,范家骅,等.潮汐河道与核电站取水口区域水流特性的数值模拟[J].计算物理,1988,5(2):129-138.
[11]王娟.潮汐水域火/核电厂取水口水流特性及泥沙淤积试验研究[D].太原:太原理工大学,2007.
[12]冯士筰,孙文心.物理海洋数值计算[M].郑州:河南科学技术出版社,1992:543-577.
[13]吴德安,张忍顺,沈永明.江苏辐射沙洲水道垂线平均余流的计算与分析[J].海洋与湖沼,2007,38(4):289-295.
[14]JIANG W S,FENG S Z.3D analytical solution to the tidally induced Lagrangian residual current equations in a narrow bay[J].Ocean Dynamics,2014,64(8):1073-1091.
[15]Jiang W,Feng S.3D analytical solution to the tidally induced Lagrangian residual current equations in a narrow bay[J].Ocean Dynamics,2014,64(8):1073-1091.