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Themigrationfromanalogtodigitalsystemsintheinstrumentationandcontrol(I&C)withinanuclearpowerplanthasincreasedthecomplexityoftheinstrumentation.TheI&Csystemsbeingdevelopedarecomputerbasedconsistingofembeddeddigitalhardwareandsoftwarecomponents.Theseembeddedsystemsperformmanyvaryingandhighlycomplexfunctionsthatareintegraltothesafety-criticalrequirementsofanuclearpowerplant.Theneedtounderstandtheeffectsofvariousfailuremodes,includingcommoncausefailuresandcommonmodefailures,inthesesystemsisbecomingincreasinglyimportantbecausethefailureofanI&Csystemcouldleadtorisksignificantevents.
核电站仪表和控制系统从模拟式到数字式系统的演进增加了仪表的复杂程度。 |
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