ENS 50214
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ENS Event | |
|---|---|
05:01 Jun 20, 2014 | |
| Title | Technical Specification Required Shutdown |
| Event Description | The National Weather Service predicts that the Missouri River level at Fort Calhoun Station will exceed 1004 feet above mean sea level on 6/20/14 at approximately 2300 CDT. Fort Calhoun Station will begin a ramp down in power to satisfy technical specification 2.16 which states, 'When the Missouri River level reaches elevation 1004 feet mean sea level, the reactor shall be in a HOT SHUTDOWN condition [Mode 3] and in Cold Shutdown [Mode 4] within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> following entry into Hot Shutdown.' The river level is currently 998 feet 3 inches and rising approximately 0.5 inches per hour. At time 0001 CDT 6/20/14 Fort Calhoun station will initiate a plant shutdown to Hot Standby and will proceed to a Cold Shutdown condition within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> following entry into Hot Shutdown, as required.
The licensee notified the NRC Resident Inspector.
EN 50214 is being retracted. At 2300 [CDT] on 6/21/14, actual Missouri River level at Fort Calhoun Station peaked at 1001' 2" mean sea level (msl) and did not reach TS 2.16 (1) shutdown criteria of 1004' msl. Based on current Army Corps of Engineers and National Weather Service published Missouri River levels, the river upstream of Fort Calhoun Station has peaked and is trending down following the recent storms. River level is predicted to continue trending downward to normal summer navigation season levels. Plans to shutdown have been terminated. Fort Calhoun Station will continue to monitor weather and river levels. Current reactor power is 66% and Fort Calhoun Station is raising power to 100%. The lowest reactor power achieved was 30 percent at 1200 CDT on 06/20/2014. The licensee notified the NRC Resident Inspector. Notified R4DO (Hay) |
| Where | |
|---|---|
Fort Calhoun  Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-4.53 h-0.189 days <br />-0.027 weeks <br />-0.00621 months <br />) | |
| Opened: | Amy Burkhart 00:29 Jun 20, 2014 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Jun 22, 2014 |
| 50214 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 502142014-06-20T05:01:00020 June 2014 05:01:00
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