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At 2130 (CDT) on April 17, 2012, the Unit … At 2130 (CDT) on April 17, 2012, the Unit 1 Plant Process Computer (PPC) was removed from service for a planned replacement in the current Unit 1 Refueling Outage. The Unit 1 PPC feeds the Safety Parameter Display System (SPDS) used in the Main Control Room (MCR) and the Technical Support Center (TSC). The Unit 1 PPC also feeds the Emergency Response Data System (ERDS). The Unit 1 and Unit 2 PPCs also feed the Plant Parameter Display System (PPDS) used in the MCR, TSC and Emergency Operations Facility (EOF). Meteorological data will remain available in the MCR but not through ERDS for either Unit 1 or Unit 2. The dose assessment program will remain functional as the Unit 2 Plant Process computer will be capable of providing the necessary data through PPDS to run the program. The dose assessment program is not affected by the Unit 1 PPC being out of service. As compensatory measures, a proceduralized backup method to fax or communicate via a phone circuit applicable data to the NRC, TSC, and EOF exists. There is no impact to the Emergency Notification System (ENS) or Health Physics Network (HPN) communication systems.</br>The new Unit 1 PPC is scheduled to be functional on April 21, 2012. However, based on the mode Unit 1 will be in, this will limit the number of points that would provide usable data. The Unit 1 PPC will be tested as mode changes occur. The Unit 1 PPC is planned to be declared functional by Mode 2. A follow-up ENS call will be made once the Unit 1 PPC is declared functional. </br>The loss of SPDS and ERDS is a 'major loss of assessment capability' and is reportable under 10CFR50.72(b)(3)(xiii).</br>The NRC Senior Resident Inspector and the State of Illinois (through the Illinois Emergency Management Agency Resident Inspector) have been notified of this ENS call.</br>* * * UPDATE FROM JOE KLEVORN TO JOHN KNOKE AT 1035 EDT ON 05/15/12 * * *</br>As of 1035 EDT on May 15, 2012, the Unit 1 PPC is considered operational with respect to the Safety Parameter Display System (SPDS), Plant Parameter Display System (PPDS) and Emergency Response Data System (ERDS). Therefore, a Major Loss of Assessment Capability no longer exists on Unit 1. The EP Manager will contact the NRC Computer Center for Unit 1 to ensure the ERDS data is being satisfactorily sent to the NRC.</br>The NRC Resident Inspector and the State of Illinois (through the Illinois Emergency Management Agency Resident Inspector) have been notified of this ENS update.</br>The R3DO (Patty Pelke) has been notified.
The R3DO (Patty Pelke) has been notified.
02:30:00, 18 April 2012 +
47,845 +
23:12:00, 17 April 2012 +
02:30:00, 18 April 2012 +
At 2130 (CDT) on April 17, 2012, the Unit … At 2130 (CDT) on April 17, 2012, the Unit 1 Plant Process Computer (PPC) was removed from service for a planned replacement in the current Unit 1 Refueling Outage. The Unit 1 PPC feeds the Safety Parameter Display System (SPDS) used in the Main Control Room (MCR) and the Technical Support Center (TSC). The Unit 1 PPC also feeds the Emergency Response Data System (ERDS). The Unit 1 and Unit 2 PPCs also feed the Plant Parameter Display System (PPDS) used in the MCR, TSC and Emergency Operations Facility (EOF). Meteorological data will remain available in the MCR but not through ERDS for either Unit 1 or Unit 2. The dose assessment program will remain functional as the Unit 2 Plant Process computer will be capable of providing the necessary data through PPDS to run the program. The dose assessment program is not affected by the Unit 1 PPC being out of service. As compensatory measures, a proceduralized backup method to fax or communicate via a phone circuit applicable data to the NRC, TSC, and EOF exists. There is no impact to the Emergency Notification System (ENS) or Health Physics Network (HPN) communication systems.</br>The new Unit 1 PPC is scheduled to be functional on April 21, 2012. However, based on the mode Unit 1 will be in, this will limit the number of points that would provide usable data. The Unit 1 PPC will be tested as mode changes occur. The Unit 1 PPC is planned to be declared functional by Mode 2. A follow-up ENS call will be made once the Unit 1 PPC is declared functional. </br>The loss of SPDS and ERDS is a 'major loss of assessment capability' and is reportable under 10CFR50.72(b)(3)(xiii).</br>The NRC Senior Resident Inspector and the State of Illinois (through the Illinois Emergency Management Agency Resident Inspector) have been notified of this ENS call.</br>* * * UPDATE FROM JOE KLEVORN TO JOHN KNOKE AT 1035 EDT ON 05/15/12 * * *</br>As of 1035 EDT on May 15, 2012, the Unit 1 PPC is considered operational with respect to the Safety Parameter Display System (SPDS), Plant Parameter Display System (PPDS) and Emergency Response Data System (ERDS). Therefore, a Major Loss of Assessment Capability no longer exists on Unit 1. The EP Manager will contact the NRC Computer Center for Unit 1 to ensure the ERDS data is being satisfactorily sent to the NRC.</br>The NRC Resident Inspector and the State of Illinois (through the Illinois Emergency Management Agency Resident Inspector) have been notified of this ENS update.</br>The R3DO (Patty Pelke) has been notified.
The R3DO (Patty Pelke) has been notified.
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00:00:00, 15 May 2012 +
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