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ENS 45255
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Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Current power
0  +
Current reactor mode
Hot Standby +
Description
Indian Point Unit 3 automatically tripped … Indian Point Unit 3 automatically tripped from 100% power at 2032 (EDT) on 8/10/2009 due to (a) generator trip. Indian Point Unit 3 is currently in mode 3. All control rods inserted on the trip. No safety relief valves lifted due to the trip. The motor driven aux feedwater pumps automatically started on low steam generator level and are being used to maintain steam generator level. Condenser steam dumps are maintaining reactor temperature. </br>After the trip , (the) 6.9kv bus 2 did not transfer to offsite power and is de-energized resulting in a loss of (the) '34' RCP (Reactor Coolant Pump). (The) 480v bus 2A was energized by the diesel generator.</br>Plant operators are investigating the cause of the generator trip and loss of bus 2.</br>Unit 2 was unaffected and remains in mode 1 at 100% power.</br>The licensee has notified the NRC Resident Inspector.</br>The licensee informed the State of New York and plans on issuing a press release.York and plans on issuing a press release.  +
Discovered date
00:32:00, 11 August 2009  +
ENS id number
45,255  +
Emergency class
Non Emergency +
Entered date
23:55:00, 10 August 2009  +
Event date
00:32:00, 11 August 2009  +
Event description
Indian Point Unit 3 automatically tripped … Indian Point Unit 3 automatically tripped from 100% power at 2032 (EDT) on 8/10/2009 due to (a) generator trip. Indian Point Unit 3 is currently in mode 3. All control rods inserted on the trip. No safety relief valves lifted due to the trip. The motor driven aux feedwater pumps automatically started on low steam generator level and are being used to maintain steam generator level. Condenser steam dumps are maintaining reactor temperature. </br>After the trip , (the) 6.9kv bus 2 did not transfer to offsite power and is de-energized resulting in a loss of (the) '34' RCP (Reactor Coolant Pump). (The) 480v bus 2A was energized by the diesel generator.</br>Plant operators are investigating the cause of the generator trip and loss of bus 2.</br>Unit 2 was unaffected and remains in mode 1 at 100% power.</br>The licensee has notified the NRC Resident Inspector.</br>The licensee informed the State of New York and plans on issuing a press release.York and plans on issuing a press release.  +
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>.
ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +, ENS 45255 +  and ENS 45255 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 11 August 2009  +
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>.
22:31:57, 24 September 2017  +
NRC officer
Steve Sandin +
Notification date
23:55:00, 10 August 2009  +
Originated by
George Keller +
Reactor critical
true  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 1 +
Reporting criterion
10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation +  and 10 CFR 50.72(b)(3)(iv)(A), System Actuation +
Reporting time
-0.0258 d (-0.62 hours, -0.00369 weeks, -8.49276e-4 months)  +
Site
Indian Point +
Start date
00:32:00, 11 August 2009  +
State
New York +
System
Steam Generator +, Feedwater +, Safety Relief Valve +  and Control Rod +
Title
Indian Point Unit 3 Automatically Tripped During Thunderstorm  +
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.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2009/20090812en.html#en45255  +
Unit
3  +
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