ENS 43873: Difference between revisions
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| event date = 12/28/2007 17:54 EST | | event date = 12/28/2007 17:54 EST | ||
| last update date = 12/28/2007 | | last update date = 12/28/2007 | ||
| title = Automatic Trip | | title = Automatic Trip on Failure of Station Power Transformer | ||
| event text = This 4 hour notification is being made in accordance with 10 CFR 50.72(b)(2)(iv)(B) to report that Salem Unit 1 has experienced an automatic reactor trip. The trip was initiated by failure of 12 Station Power Transformer (SPT). The cause of the trip was the loss of two Reactor Coolant Pumps (RCP) (13 and 14). These RCPs were powered from 'F' and 'G' group busses (non safeguards), which were powered by 12 SPT. | | event text = This 4 hour notification is being made in accordance with 10 CFR 50.72(b)(2)(iv)(B) to report that Salem Unit 1 has experienced an automatic reactor trip. The trip was initiated by failure of 12 Station Power Transformer (SPT). The cause of the trip was the loss of two Reactor Coolant Pumps (RCP) (13 and 14). These RCPs were powered from 'F' and 'G' group busses (non safeguards), which were powered by 12 SPT. | ||
Post trip the following occurred: 11, 12 & 13 Auxiliary Feed Water (AFW) Pumps [automatically] started after the trip due to valid steam generator low levels (14%) as expected. The automatic start of the Auxiliary Feedwater System due to a valid steam generator low level is an ESF actuation and is an 8 hour report in accordance with 10 CFR 50.72 (b)(3)(iv)(B). 13 AFW pump was tripped [in accordance with] the Emergency Operating Procedure and will be returned to an operable condition following recovery of steam generator levels. | Post trip the following occurred: 11, 12 & 13 Auxiliary Feed Water (AFW) Pumps [automatically] started after the trip due to valid steam generator low levels (14%) as expected. The automatic start of the Auxiliary Feedwater System due to a valid steam generator low level is an ESF actuation and is an 8 hour report in accordance with 10 CFR 50.72 (b)(3)(iv)(B). 13 AFW pump was tripped [in accordance with] the Emergency Operating Procedure and will be returned to an operable condition following recovery of steam generator levels. |
Latest revision as of 21:15, 1 March 2018
Where | |
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Salem New Jersey (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(2)(iv)(B), RPS Actuation 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
Time - Person (Reporting Time:+-2.93 h-0.122 days <br />-0.0174 weeks <br />-0.00401 months <br />) | |
Opened: | Eric Powell 19:58 Dec 28, 2007 |
NRC Officer: | Bill Huffman |
Last Updated: | Dec 28, 2007 |
43873 - NRC Website
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