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The following information was received fro … The following information was received from the licensee via facsimile:</br>At 1519 (CDT) on 2-15-04, the plant was at 20 power, increasing load. During the transfer from the bypass feedwater regulating valves to the main feedwater regulating valves, the main turbine tripped due to a P-14 S/G Hi-Hi level signal. The P-14 signal also caused a Feedwater Isolation Signal (FWIS), which resulted in a Motor Driven Aux Feedwater Actuation (MDAFAS), and Steam Generator Blowdown Isolation Signal.</br>Steam Generator levels subsequently shrunk to low levels causing a Steam Generator low level reactor trip at 1524 (hrs). Sometime after the turbine trip, the turbine driven aux feed pump ((TDAFP)) was manually started to help restore S/G levels. The pump was later manually secured, but then received a subsequent auto-start signal and tripped on overspeed. The TDAFP was declared inoperable at 1535 (hrs). With the exception of the TDAFP, all safety systems operated properly.</br>The plant is currently stable in Mode 3, with the primary plant at 557 deg F and 2235 psig, and pressurizer level at 25%.</br>The licensee has notified the NRC Resident Inspector.</br>* * * UPDATE AT 0031 EST ON 2/16/04 HOPE BRADLEY TO GOTT * * * </br>The following information was received from the licensee via facsimile as a "rewrite of above paragraph 2.</br>Sometime after the turbine trip, the Turbine Driven Aux Feedwater Pump (TDAFP) was manually started to help restore S/G levels. Due to decreasing reactor coolant system (RCS) temperature, it was decided to stop the TDAFP since it is a steam load. The steam supply valves were remote manually closed from the control room. At the same time the steam supply valves were closing, the steam generator levels shrunk to low levels causing a Steam Generator low level reactor trip and Turbine Driven Aux Feedwater Actuation (TDAFAS) at 1524. The steam supply valves immediately reopened due to the TDAFAS. It is postulated that this transient in the steam supply caused the pump to overspeed trip. The TDAFP was declared inoperable at 1535. With the exception of the TDAFP, all safety systems operated properly.</br>The licensee notified the NRC Resident Inspector.</br>Notified R4DO (Cain). Resident Inspector.
Notified R4DO (Cain).
21:19:00, 15 February 2004 +
20:18:00, 15 February 2004 +
21:19:00, 15 February 2004 +
The following information was received fro … The following information was received from the licensee via facsimile:</br>At 1519 (CDT) on 2-15-04, the plant was at 20 power, increasing load. During the transfer from the bypass feedwater regulating valves to the main feedwater regulating valves, the main turbine tripped due to a P-14 S/G Hi-Hi level signal. The P-14 signal also caused a Feedwater Isolation Signal (FWIS), which resulted in a Motor Driven Aux Feedwater Actuation (MDAFAS), and Steam Generator Blowdown Isolation Signal.</br>Steam Generator levels subsequently shrunk to low levels causing a Steam Generator low level reactor trip at 1524 (hrs). Sometime after the turbine trip, the turbine driven aux feed pump ((TDAFP)) was manually started to help restore S/G levels. The pump was later manually secured, but then received a subsequent auto-start signal and tripped on overspeed. The TDAFP was declared inoperable at 1535 (hrs). With the exception of the TDAFP, all safety systems operated properly.</br>The plant is currently stable in Mode 3, with the primary plant at 557 deg F and 2235 psig, and pressurizer level at 25%.</br>The licensee has notified the NRC Resident Inspector.</br>* * * UPDATE AT 0031 EST ON 2/16/04 HOPE BRADLEY TO GOTT * * * </br>The following information was received from the licensee via facsimile as a "rewrite of above paragraph 2.</br>Sometime after the turbine trip, the Turbine Driven Aux Feedwater Pump (TDAFP) was manually started to help restore S/G levels. Due to decreasing reactor coolant system (RCS) temperature, it was decided to stop the TDAFP since it is a steam load. The steam supply valves were remote manually closed from the control room. At the same time the steam supply valves were closing, the steam generator levels shrunk to low levels causing a Steam Generator low level reactor trip and Turbine Driven Aux Feedwater Actuation (TDAFAS) at 1524. The steam supply valves immediately reopened due to the TDAFAS. It is postulated that this transient in the steam supply caused the pump to overspeed trip. The TDAFP was declared inoperable at 1535. With the exception of the TDAFP, all safety systems operated properly.</br>The licensee notified the NRC Resident Inspector.</br>Notified R4DO (Cain). Resident Inspector.
Notified R4DO (Cain).
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20 +
00:00:00, 16 February 2004 +
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>.
02:24:10, 2 March 2018 +
20:18:00, 15 February 2004 +
true +
-0.0425 d (-1.02 hours, -0.00607 weeks, -0.0014 months) +
21:19:00, 15 February 2004 +
Overspeed trip + and Overspeed +
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.