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Unit 2 Isolation Condenser did not meet ac … Unit 2 Isolation Condenser did not meet acceptance criteria per DOS 1300-01 Isolation Condenser 5 year heat removal capability test. This is a single train system and cannot fulfill its safety function. The Isolation Condenser is a single train system. The function of the IC System is to respond to main steam SAFETY ANALYSES line isolation events by providing core cooling to the reactor. The IC System is an Engineered Safety Feature System, and credit is taken in the loss of feedwater transient analysis for IC System operation.</br>Unit 2 entered a 14-day TS LCO A/S 3.5.3 at 0249 CDT on 09/07/08 after declaring the IC System Inoperable. The Action Statement (A/S) requires restoration of the IC System to Operable status within 14 days or place the unit in hot shutdown within 12 hrs followed by entry into cold shutdown in the following 24 hrs. The licensee is performing maintenance to adjust the cooling flow valve stroke time in order to re-test and exit the LCO A/S.</br>The licensee informed the NRC Resident Inspector.</br>* * * UPDATE AT 1318 EDT ON 10/31/08 FROM SCOTT BRILEY TO S. SANDIN * * *</br>The licensee is retracting this report based on the following:</br>The purpose of this notification is to retract ENS notification 44470 made on September 7, 2008 for Dresden Nuclear Power Station. After further evaluation, Dresden has determined that the Isolation Condenser did successfully pass its 5-year heat removal test on September 7, 2008. The evaluation corrected the steam flow rate based on a more accurate instrument and calculated the heat removal rate by multiplying the mass flow rate through the Isolation Condenser times the difference in enthalpy between the steam going to the condenser and the condensate leaving the condenser. Therefore, the Isolation Condenser was capable of performing its safety function and the ENS report is being retracted.</br>The licensee informed the NRC Resident Inspector. Notified R3DO (Kozak).esident Inspector. Notified R3DO (Kozak). +
13:05:00, 7 September 2008 +
14:45:00, 7 September 2008 +
13:05:00, 7 September 2008 +
Unit 2 Isolation Condenser did not meet ac … Unit 2 Isolation Condenser did not meet acceptance criteria per DOS 1300-01 Isolation Condenser 5 year heat removal capability test. This is a single train system and cannot fulfill its safety function. The Isolation Condenser is a single train system. The function of the IC System is to respond to main steam SAFETY ANALYSES line isolation events by providing core cooling to the reactor. The IC System is an Engineered Safety Feature System, and credit is taken in the loss of feedwater transient analysis for IC System operation.</br>Unit 2 entered a 14-day TS LCO A/S 3.5.3 at 0249 CDT on 09/07/08 after declaring the IC System Inoperable. The Action Statement (A/S) requires restoration of the IC System to Operable status within 14 days or place the unit in hot shutdown within 12 hrs followed by entry into cold shutdown in the following 24 hrs. The licensee is performing maintenance to adjust the cooling flow valve stroke time in order to re-test and exit the LCO A/S.</br>The licensee informed the NRC Resident Inspector.</br>* * * UPDATE AT 1318 EDT ON 10/31/08 FROM SCOTT BRILEY TO S. SANDIN * * *</br>The licensee is retracting this report based on the following:</br>The purpose of this notification is to retract ENS notification 44470 made on September 7, 2008 for Dresden Nuclear Power Station. After further evaluation, Dresden has determined that the Isolation Condenser did successfully pass its 5-year heat removal test on September 7, 2008. The evaluation corrected the steam flow rate based on a more accurate instrument and calculated the heat removal rate by multiplying the mass flow rate through the Isolation Condenser times the difference in enthalpy between the steam going to the condenser and the condensate leaving the condenser. Therefore, the Isolation Condenser was capable of performing its safety function and the ENS report is being retracted.</br>The licensee informed the NRC Resident Inspector. Notified R3DO (Kozak).esident Inspector. Notified R3DO (Kozak). +
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67 +
00:00:00, 31 October 2008 +
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>.
22:33:36, 24 September 2017 +
14:45:00, 7 September 2008 +
true +
false +
0.0696 d (1.67 hours, 0.00994 weeks, 0.00229 months) +
13:05:00, 7 September 2008 +
Feedwater + and Main Steam +
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