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On June 30, 2009, at 1513 PDT, Unit 2 comm … On June 30, 2009, at 1513 PDT, Unit 2 commenced a ramp(-down) in accordance with the annunciator response guidance to enter Operating Procedure (OP) Abnormal Procedure AP-25 due to loss of forced cooling to main transformer bank (MTB) C-Phase transformer. At 1538, Unit 2 was separated from the grid in accordance with plant OP AP-25 initiation of a main generator unit trip. At 1554 PDT, the Reactor Trip Breakers (RTBs) were manually opened per OP AP-25 Step 24.j. (Reactor) power was being held in Mode 2 at about 3% reactor power per the procedure when the RTBs were opened.</br>The investigation into the cause is continuing.</br>This event is being reported in accordance with 10 CFR 50.72(b)(2)(xi), Offsite Notification, as Pacific Gas and Electric plans to make a news release regarding the event that may raise media interest.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
22:13:00, 30 June 2009 +
45,178 +
21:49:00, 30 June 2009 +
22:13:00, 30 June 2009 +
On June 30, 2009, at 1513 PDT, Unit 2 comm … On June 30, 2009, at 1513 PDT, Unit 2 commenced a ramp(-down) in accordance with the annunciator response guidance to enter Operating Procedure (OP) Abnormal Procedure AP-25 due to loss of forced cooling to main transformer bank (MTB) C-Phase transformer. At 1538, Unit 2 was separated from the grid in accordance with plant OP AP-25 initiation of a main generator unit trip. At 1554 PDT, the Reactor Trip Breakers (RTBs) were manually opened per OP AP-25 Step 24.j. (Reactor) power was being held in Mode 2 at about 3% reactor power per the procedure when the RTBs were opened.</br>The investigation into the cause is continuing.</br>This event is being reported in accordance with 10 CFR 50.72(b)(2)(xi), Offsite Notification, as Pacific Gas and Electric plans to make a news release regarding the event that may raise media interest.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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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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