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On May 16, 2001 during performance of a ca … On May 16, 2001 during performance of a causal analysis, a condition was discovered at Calvert Cliffs that could have prevented the Instrument Air System from fulfilling its Appendix R safety function. T Specifically, the analysis identified that the effects of an extra wire in the Instrument Air System's 22 Saltwater Air Compressor's T (SWAC's) T control circuit could, in the event of a fire, shunt out the protective fuses. T This could result in loss of local operation of the 22 SWAC as required in the event of an Appendix R (Control Room) fire. T The 22 SWAC could have been incapable of performing its Appendix R function from the time when a plant modification was completed (February 25, T 1999) until the additional wire was ultimately removed (February 14, T 2001), a period of about two years. T The additional wire was removed and 22 SWAC was tested with satisfactory results on February 14, T 2001. T An inspection was performed for the other SWACs T (11, T 12, and 21) and the additional wire had been removed as required at the time of the modification. required at the time of the modification. +
On May 16, 2001 during performance of a ca … On May 16, 2001 during performance of a causal analysis, a condition was discovered at Calvert Cliffs that could have prevented the Instrument Air System from fulfilling its Appendix R safety function. T Specifically, the analysis identified that the effects of an extra wire in the Instrument Air System's 22 Saltwater Air Compressor's T (SWAC's) T control circuit could, in the event of a fire, shunt out the protective fuses. T This could result in loss of local operation of the 22 SWAC as required in the event of an Appendix R (Control Room) fire. T The 22 SWAC could have been incapable of performing its Appendix R function from the time when a plant modification was completed (February 25, T 1999) until the additional wire was ultimately removed (February 14, T 2001), a period of about two years. T The additional wire was removed and 22 SWAC was tested with satisfactory results on February 14, T 2001. T An inspection was performed for the other SWACs T (11, T 12, and 21) and the additional wire had been removed as required at the time of the modification. required at the time of the modification. +
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