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°£·«ÇÑ System ±¸¼ºÀº ¾Æ·¡¿Í °°½À´Ï´Ù.(÷ºÎÆÄÀÏ ÂüÁ¶)
CWS : 4.8 barg @Unit B/L
CWR : 2.8 barg @Unit B/L
Pump ¿Í Unit°úÀÇ °Å¸® : ¾à 3km
Pump downstream¿¡ ÀÖ´Â EquipmentÀÇ Design Pressure : 11.5barg
Expansion Drum Design Pressure : 4.5barg
ÀϹÝÀûÀ¸·Î, PumpÀÇ Shut-off Prssuer´Â ¾Æ·¡¿Í °°Àº ¹æ¹ýÀ¸·Î ¿¹ÃøÇϴ°ÍÀ¸·Î ¾Ë°í ÀÖ½À´Ï´Ù.
Shut-off Pressure= Max. Suction Pressure + 1.36 x dP(Pump Normal Differential Pressure)
Max. Suction Pressure = Suction Vessel Design Pressure + Nor. Static Head
¿©±â¼ ÀúÀÇ Áú¹®Àº ´ÙÀ½°ú °°½À´Ï´Ù.
(1) ÀÌ System¿¡¼, Pump ÀÔÀå¿¡¼ Main Suction LineÀº D-1ÀÌ ¾Æ´Ñ, CWR headerÀε¥ Expansion Drum(D-1)À» PumpÀÇ Suction Vessel·Î °í·ÁÇØ¾ß Çϴ°¡¿ä? ÀÌ°ÍÀ» Suction Vessel·Î »ý°¢ÇÏ°í Shut-off¸¦ ±¸Çغ¸¸é, 11.5barg¸¦ ³Ñ°Ô µÇ¾î, Pump DownstreamÀÇ EquipmentµéÀÇ Design pressure¿¡ ¿µÇâÀ» ÁÖ°Ô µË´Ï´Ù. (Cooling Water PumpÀÇ dP°¡ Áõ°¡ÇÏ¿©, CWR 2.8 barg·Î Max. SuctionÀ» Àâ°í °è»êÇÏ¿©µµ 11.5barg°¡ ³Ñ´Â»óȲÀÔ´Ï´Ù.)
(2) ¸¸¾à, D-1À» À§¿Í°°ÀÌ °í·ÁÇÏÁö ¾Ê°Å³ª, D-1ÀÌ ¾ø´Â °æ¿ì¶ó¸é, Max. Suction Pressure´Â ¾î¶°ÇÑ Case¸¦ »ý°¢ÇØ¾ß Çϴ°¡¿ä?
¿¹¸¦µé¾î, °©ÀÚ±â V-2°¡ Àá±ä °æ¿ì¸¦ »ý°¢Çϸé, ±× ¼ø°£ PumpÀÇ Suction ¾Ð·ÂÀº Nor. Pressure¿Í °°Àº 1.7barg·Î »ý°¢ÇؾßÇÏ´ÂÁö, ¾Æ´Ï¸é Pump°¡ ´õÀÌ»ó °¡¾ÐÇÏÁö ¸øÇϹǷÎ(À¯Ã¼ È帧ÀÌ 0) SuctionÀÇ ¾Ð·ÂÀ» 0barg(or Static head¸¸ °í·Á)À¸·Î º¸¾Æ¾ß ÇÏ´ÂÁö, 4.8barg¿Í 1.7barg »çÀÌÀÇ ¾î¶² ¾Ð·ÂÀ¸·Î equalizing µÇ´Â °ÍÀ¸·Î º¸¾Æ¾ß ÇÏ´ÂÁö µµ¹«Áö °¨ÀÌ ÀâÈ÷Áö ¾Ê½À´Ï´Ù.
(3) v-4°¡ Àá±ä°æ¿ì¿¡´Â PumpÀÇ shut-off Pressure°¡ D-1¿¡µµ ¿µÇâÀ» ¹ÌÄ¥°ÍÀ¸·Î »ý°¢µÇ´Âµ¥, ÇöÀç D-1ÀÇ design Pressure¿¡´Â °í·ÁµÇ¾î ÀÖÁö ¾Ê½À´Ï´Ù.(4.5barg). Áï, °ú¿¬ Closed loop¿¡¼´Â PumpÀÇ Discharge¸¦ ¾îµð±îÁö·Î º¸¾Æ¾ß Çϴ°¡°¡ Áú¹®ÀÌ µÇ´Â°Í °°½À´Ï´Ù.
(4) ¸¶Áö¸·À¸·Î, ÀÌ°ÍÀ» °í¹ÎÇÏ´Ù°¡ µç Àǹ®Á¡Àε¥, ¹Ùº¸½º·¯¿î Áú¹®ÀÏÁöµµ ¸ð¸£°ÚÁö¸¸, ÃæºÐÇÑ Design Pressure¸¦ °¡Áö´Â Vessel¿¡ ÆßÇÁ·Î ¾×ü¸¦ °¡µæä¿î ÈÄ °¡¾ÐÇÏ´Ù°¡(ex. 7barg), °¡¾ÐÀ» ¸ØÃß°Ô µÇ¸é(VesselÀ» isolation ½ÃÅ°¸é) Vessel³»ÀÇ ¾×ü´Â 7barg¸¦ °è¼Ó À¯Áö ÇÏ°Ô µÇ´Â°¡¿ä? ±âüÀÇ °æ¿ì³ª ±âü°¡ ÇÔ²² Àִ°æ¿ì¶ó¸é ÀÌÇØ°¡ µÇ´Âµ¥, ¾×ü¸¸ °¡µæá´Ù°í »ý°¢ÇÏ´Ï Àß ÀÌÇØ°¡ µÇÁö ¾Ê½À´Ï´Ù.
µÎ¼¾ø´Â Áú¹®À̾ú´Âµ¥, Àß ÀÌÇØ°¡ µÇÁö ¾ÊÀ¸½Ã¸é ´ä±Û ´Þ¾ÆÁֽøé Á» ´õ ÀÚ¼¼È÷ ¼³¸íµå¸®°Ú½À´Ï´Ù.
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