ENS 44965: Difference between revisions
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| event date = 04/03/2009 00:28 CDT | | event date = 04/03/2009 00:28 CDT | ||
| last update date = 04/03/2009 | | last update date = 04/03/2009 | ||
| title = Manual Reactor Scram Due | | title = Manual Reactor Scram Due to Increasing Reactor Water Level During Calibration | ||
| event text = This report is being made under [10 CFR] 50.72(b)(2)(iv)(B) for inserting a manual reactor scram due to indicated reactor water level of 205 inches and rising. The exact cause of the reactor water level increase is not known at this time. However, STP [Surveillance Test Procedure] 3.3.3.2-09, 'Reactor Water Level and Pressure Instruments Calibration' was in progress at the time and is likely the cause of the level transient. | | event text = This report is being made under [10 CFR] 50.72(b)(2)(iv)(B) for inserting a manual reactor scram due to indicated reactor water level of 205 inches and rising. The exact cause of the reactor water level increase is not known at this time. However, STP [Surveillance Test Procedure] 3.3.3.2-09, 'Reactor Water Level and Pressure Instruments Calibration' was in progress at the time and is likely the cause of the level transient. | ||
In addition, this report is being made under [10 CFR] 50.72(b)(3)(iv)(A) due to PCIS [Primary Containment Isolation System] groups 2, 3 and 4 being received when reactor water level dropped below 170 inches following the reactor scram. All isolations went to completion. This level response is considered normal following a reactor scram from power and reactor water level is currently being controlled in the normal band. All PCIS group isolations were reset. | In addition, this report is being made under [10 CFR] 50.72(b)(3)(iv)(A) due to PCIS [Primary Containment Isolation System] groups 2, 3 and 4 being received when reactor water level dropped below 170 inches following the reactor scram. All isolations went to completion. This level response is considered normal following a reactor scram from power and reactor water level is currently being controlled in the normal band. All PCIS group isolations were reset. | ||
Latest revision as of 22:12, 1 March 2018
| Where | |
|---|---|
Duane Arnold  Iowa (NRC Region 3) | |
| 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:+-2.02 h-0.0842 days <br />-0.012 weeks <br />-0.00277 months <br />) | |
| Opened: | Ellis Vann 03:27 Apr 3, 2009 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Apr 3, 2009 |
| 44965 - NRC Website
| |
Duane Arnold with 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |