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The Plant Process Computer System (Emergen … The Plant Process Computer System (Emergency Response and Data Acquisition System, 'ERDADS') will be taken out of service for an approximate 4 week period (on Unit 3) to implement a planned modification. The current ERDADS is being replaced on Unit 3 and a computer outage is required for the installation of the new ERDADS. During this time period ERDS and SPDS functions will not be available for Unit 3. Unit 4 will function normally after a modification (expected duration 6 hours) to the existing computer operating system software is implemented. Also, Unit 3 Regulatory Guide 1.97 category 2D containment temperature and power system indicators for motor control centers, batteries, and inverters will not be available in the Control Room, although other instrumentation is available to monitor these parameters.</br>This is an 8-hour reportable event per 10 CFR 50.72(b)(3)(xiii) Major Loss of Assessment Capability. The operation of plant systems will not be affected due to this planned action. ERDS and SPDS parameters will be monitored by control board indications. Compensatory actions have been developed.</br>Follow up notification to NRC will be given once Unit 4 ERDS and SPDS are returned to service.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE PROVIDED BY JIM SPEICHER TO JEFF ROTTON AT 1031 EDT ON 09/10/07 * * *</br>The Plant Process Computer System (Emergency Response and Data Acquisition System, 'ERDADS') was taken out of service on both Unit 3 and Unit 4 in order to implement a planned modification on Unit 3. The current ERDADS system is being replaced on Unit 3 during the current Unit 3 refueling outage. In order to perform this replacement, ERDS and SPDS functions had to be temporarily removed from Unit 4.</br>ERDADS and SPDS functions have been returned to service on Unit 4 and have been verified to operate correctly. The ERDS link for Unit 4 was satisfactorily tested on 9/7/07. </br>The ERDADS replacement on Unit 3 will continue with an estimated completion on September 24, 2007.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (S. Shaeffer)</br>* * * UPDATE FROM NIELSEN TO HUFFMAN AT 1642 EDT ON 10/10/07 * * *</br>The Plant Process Computer System (Emergency Response and Data Acquisition System. 'ERDADS') was taken out of service in order to implement a planned modification on Unit 3. Replacement of the ERDADS system on Unit 3 is complete. The ERDS link for Unit 3 was satisfactorily tested on 10/10/07.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Desai).esident Inspector. Notified R2DO (Desai).
15:17:00, 5 September 2007 +
43,614 +
12:46:00, 5 September 2007 +
15:17:00, 5 September 2007 +
The Plant Process Computer System (Emergen … The Plant Process Computer System (Emergency Response and Data Acquisition System, 'ERDADS') will be taken out of service for an approximate 4 week period (on Unit 3) to implement a planned modification. The current ERDADS is being replaced on Unit 3 and a computer outage is required for the installation of the new ERDADS. During this time period ERDS and SPDS functions will not be available for Unit 3. Unit 4 will function normally after a modification (expected duration 6 hours) to the existing computer operating system software is implemented. Also, Unit 3 Regulatory Guide 1.97 category 2D containment temperature and power system indicators for motor control centers, batteries, and inverters will not be available in the Control Room, although other instrumentation is available to monitor these parameters.</br>This is an 8-hour reportable event per 10 CFR 50.72(b)(3)(xiii) Major Loss of Assessment Capability. The operation of plant systems will not be affected due to this planned action. ERDS and SPDS parameters will be monitored by control board indications. Compensatory actions have been developed.</br>Follow up notification to NRC will be given once Unit 4 ERDS and SPDS are returned to service.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE PROVIDED BY JIM SPEICHER TO JEFF ROTTON AT 1031 EDT ON 09/10/07 * * *</br>The Plant Process Computer System (Emergency Response and Data Acquisition System, 'ERDADS') was taken out of service on both Unit 3 and Unit 4 in order to implement a planned modification on Unit 3. The current ERDADS system is being replaced on Unit 3 during the current Unit 3 refueling outage. In order to perform this replacement, ERDS and SPDS functions had to be temporarily removed from Unit 4.</br>ERDADS and SPDS functions have been returned to service on Unit 4 and have been verified to operate correctly. The ERDS link for Unit 4 was satisfactorily tested on 9/7/07. </br>The ERDADS replacement on Unit 3 will continue with an estimated completion on September 24, 2007.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (S. Shaeffer)</br>* * * UPDATE FROM NIELSEN TO HUFFMAN AT 1642 EDT ON 10/10/07 * * *</br>The Plant Process Computer System (Emergency Response and Data Acquisition System. 'ERDADS') was taken out of service in order to implement a planned modification on Unit 3. Replacement of the ERDADS system on Unit 3 is complete. The ERDS link for Unit 3 was satisfactorily tested on 10/10/07.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Desai).esident Inspector. Notified R2DO (Desai).
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00:00:00, 10 October 2007 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
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