Browse wiki
Jump to navigation
Jump to search
10 CFR 50.72 +, 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident + and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
100 +
At 1900 hrs on 8/17/06, all four Emergency … At 1900 hrs on 8/17/06, all four Emergency Diesel Generators (EDGs) were declared INOPERABLE. The inoperability is a result of undersized control transformers for each of the Emergency Diesel Generator Service Water (DGSW) Pumps. The concern is that the DGSW pump contactors will not receive adequate voltage at the starters to ensure the starters pickup under degraded voltage conditions. A 2 hour Limiting Condition for Operability (LCO) was entered per LCO 3.8.1 to restore both EDGs in one division to OPERABLE status. At 2100 hours on 8/17/06 the two hour time requirement expired and a 12 hour LCO to place the plant in Mode 3 (Hot Shutdown) was entered.</br>At 0042 hrs on 8/18/06, compensatory measures have been put in place to restore operability to both division 2 EDGs. The compensatory measures include placing the local control switch for both division 2 DGSW Pumps in run. Placing the local control switches in run ensures sufficient voltage will be available at the starters to ensure the starters pickup following a loss of offsite power, load shed, and restoration of power to the applicable busses. With operability restored to division 2 EDGs, the new expiration time for the LCO has been revised to 72 hours based on discovery of one or both EDGs in one division inoperable concurrent with CTG 11-1 (station blackout Combustion Turbine Generator 11-1) not available. After 72 hours, if operability is not restored to either CTG 11-1 or both division 1 EDGs, the plant will be required to enter Mode 3 within the following 12 hours.</br>This report is being made pursuant to 10CFR50.72.(b)(3)(v) as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to (A) Shut down the reactor and maintain it in a safe shutdown condition; (B) Remove Residual Heat; (C) Control the release of radioactive material; or (D) Mitigate the consequences of an accident. The NRC resident inspector has been notified.</br>The licensee stated that the current 72 hour LCO will expire at 1900 EDT 08/20/06.hour LCO will expire at 1900 EDT 08/20/06.
23:00:00, 17 August 2006 +
01:00:00, 18 August 2006 +
23:00:00, 17 August 2006 +
At 1900 hrs on 8/17/06, all four Emergency … At 1900 hrs on 8/17/06, all four Emergency Diesel Generators (EDGs) were declared INOPERABLE. The inoperability is a result of undersized control transformers for each of the Emergency Diesel Generator Service Water (DGSW) Pumps. The concern is that the DGSW pump contactors will not receive adequate voltage at the starters to ensure the starters pickup under degraded voltage conditions. A 2 hour Limiting Condition for Operability (LCO) was entered per LCO 3.8.1 to restore both EDGs in one division to OPERABLE status. At 2100 hours on 8/17/06 the two hour time requirement expired and a 12 hour LCO to place the plant in Mode 3 (Hot Shutdown) was entered.</br>At 0042 hrs on 8/18/06, compensatory measures have been put in place to restore operability to both division 2 EDGs. The compensatory measures include placing the local control switch for both division 2 DGSW Pumps in run. Placing the local control switches in run ensures sufficient voltage will be available at the starters to ensure the starters pickup following a loss of offsite power, load shed, and restoration of power to the applicable busses. With operability restored to division 2 EDGs, the new expiration time for the LCO has been revised to 72 hours based on discovery of one or both EDGs in one division inoperable concurrent with CTG 11-1 (station blackout Combustion Turbine Generator 11-1) not available. After 72 hours, if operability is not restored to either CTG 11-1 or both division 1 EDGs, the plant will be required to enter Mode 3 within the following 12 hours.</br>This report is being made pursuant to 10CFR50.72.(b)(3)(v) as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to (A) Shut down the reactor and maintain it in a safe shutdown condition; (B) Remove Residual Heat; (C) Control the release of radioactive material; or (D) Mitigate the consequences of an accident. The NRC resident inspector has been notified.</br>The licensee stated that the current 72 hour LCO will expire at 1900 EDT 08/20/06.hour LCO will expire at 1900 EDT 08/20/06.
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
100 +
00:00:00, 18 August 2006 +
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>.
02:18:13, 2 March 2018 +
01:00:00, 18 August 2006 +
true +
false +
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +, 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident + and 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material +
0.0833 d (2 hours, 0.0119 weeks, 0.00274 months) +
23:00:00, 17 August 2006 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.