ENS 43976: Difference between revisions

v t e ENS Event
04:07 Feb 11, 2008
Title	Manual Reactor Scram Due to Increasing Reactor Vessel Level
Event Description	On February 10, 2008, at approximately 2207 hours0.0255 days <br />0.613 hours <br />0.00365 weeks <br />8.397635e-4 months <br /> CST, the 'B' Reactor Recirculation pump tripped from fast speed to off. The resultant reactor pressure vessel level swell resulted in reactor pressure vessel level being greater than 48 inches and rising. Per Clinton Power Station operating procedures, the 'A' Reactor Operator placed the mode switch to the 'shutdown' position initiating a manual reactor scram. All control rods inserted [fully]. CPS is currently stable in Mode 3. Decay heat is being removed to the main condenser via the turbine bypass valves. Reactor level is being maintained using the motor driven reactor feedpump. No SRVs lifted during the transient. Licensee is in progress of restoring the electrical plant to a normal shutdown lineup. The licensee notified the NRC Resident Inspector. * * UPDATE AT 2226 ON 2/13/08 FROM M. EVANS TO P. SNYDER * * * After further analysis of the scram, it was determined that an automatic level 8, high reactor water level, scram occurred approximately one second prior to the reactor operator placing the mode switch to the 'shutdown' position. The licensee notified the NRC Resident Inspector.

ENS 43976 +/-
Where
Clinton Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(2)(iv)(B), RPS Actuation
Time - Person (Reporting Time:+-2.32 h-0.0967 days <br />-0.0138 weeks <br />-0.00318 months <br />)
Opened:	Mike Reandeau 01:48 Feb 11, 2008
NRC Officer:	Jeff Rotton
Last Updated:	Feb 13, 2008
43976 - NRC Website Loading map... {"minzoom":false,"maxzoom":false,"mappingservice":"leaflet","width":"350px","height":"250px","centre":false,"title":"","label":"","icon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"zoom":6,"defzoom":14,"layers":["OpenStreetMap"],"image layers":[],"overlays":[],"resizable":false,"fullscreen":false,"scrollwheelzoom":true,"cluster":false,"clustermaxzoom":20,"clusterzoomonclick":true,"clustermaxradius":80,"clusterspiderfy":true,"geojson":"","clicktarget":"","imageLayers":[],"locations":[{"text":"\u003Cb\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003E\u003Ca class=\"mw-selflink selflink\"\u003EENS 43976\u003C/a\u003E - \u003Ca href=\"/Clinton\" title=\"Clinton\"\u003EClinton\u003C/a\u003E\n\u003C/p\u003E\u003C/div\u003E\u003C/b\u003E\u003Cdiv class=\"mw-parser-output\"\u003E\u003Cp\u003EManual Reactor Scram Due to Increasing Reactor Vessel Level\n\u003C/p\u003E\u003C/div\u003E","title":"ENS 43976 - Clinton\n","link":"","lat":40.17286111111111,"lon":-88.8332,"icon":"/w/images/b/be/Constellation_icon.png"}],"imageoverlays":null}
v • d • e

v t e Emergency Notification System
Clinton with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation
WEEKMONTHYEAR2023-02-01T05:43:00 [Table view]
[ENS list for Clinton]

@@ Line 16: / Line 16: @@
 | event date = 02/10/2008 22:07 CST
 | last update date = 02/13/2008
-| title = Manual Reactor Scram Due To Increasing Reactor Vessel Level
+| title = Manual Reactor Scram Due to Increasing Reactor Vessel Level
 | event text = On February 10, 2008, at approximately 2207 hours CST, the 'B' Reactor Recirculation pump tripped from fast speed to off.  The resultant reactor pressure vessel level swell resulted in reactor pressure vessel level being greater than 48 inches and rising.  Per Clinton Power Station operating procedures, the 'A' Reactor Operator placed the mode switch to the 'shutdown' position initiating a manual reactor scram.  All control rods inserted [fully].  CPS is currently stable in Mode 3.
 Decay heat is being removed to the main condenser via the turbine bypass valves.  Reactor level is being maintained using the motor driven reactor feedpump.  No SRVs lifted during the transient.  Licensee is in progress of restoring the electrical plant to a normal shutdown lineup.

Latest revision as of 21:15, 1 March 2018