ENS 48250

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v t e ENS Event
12:27 Aug 29, 2012
Title	Loss of Emergency Assessment Capability Due to Limited Range on Indicator
Event Description	{{#Wiki_filter:This is a non-emergency report regarding a condition that does not apply in our current operating mode. No actual event has occurred. At 0827 hours EDT, on August 29, 2012, Harris Operations discovered that the instrumentation used for determination of Emergency Action Levels (EALs) during Modes 5 and 6 for loss of Reactor Coolant System (RCS) inventory would not provide the required information. Specifically, the criterion states that an Alert should be declared if standpipe level is less than -96.5 inches (72% on the Reactor Vessel Level Indication System [RVLIS]). During a loss of inventory from the reactor vessel below the RCS loop nozzles, the standpipe indication would not reflect a level below -95.5 inches. This condition was discovered during an assessment of EAL implementing procedures in response to industry operating experience. There is no adverse impact on nuclear safety. All Site Emergency Coordinators and Emergency Response Managers will be directed to use the alternate RVLIS indication to ensure emergency classifications continue to be accurately assessed, which will also be communicated in a shift order. The EAL guidance will be revised to fully resolve the issue in an expeditious manner. This report is submitted based upon a loss of emergency assessment capability in accordance with �50.72(b)(3)(xiii). The NRC Resident Inspector has been informed. }}[[Event description::Description::{{#Regex_clear:This is a non-emergency report regarding a condition that does not apply in our current operating mode. No actual event has occurred. At 0827 hours EDT, on August 29, 2012, Harris Operations discovered that the instrumentation used for determination of Emergency Action Levels (EALs) during Modes 5 and 6 for loss of Reactor Coolant System (RCS) inventory would not provide the required information. Specifically, the criterion states that an Alert should be declared if standpipe level is less than -96.5 inches (72% on the Reactor Vessel Level Indication System [RVLIS]). During a loss of inventory from the reactor vessel below the RCS loop nozzles, the standpipe indication would not reflect a level below -95.5 inches. This condition was discovered during an assessment of EAL implementing procedures in response to industry operating experience. There is no adverse impact on nuclear safety. All Site Emergency Coordinators and Emergency Response Managers will be directed to use the alternate RVLIS indication to ensure emergency classifications continue to be accurately assessed, which will also be communicated in a shift order. The EAL guidance will be revised to fully resolve the issue in an expeditious manner. This report is submitted based upon a loss of emergency assessment capability in accordance with �50.72(b)(3)(xiii). The NRC Resident Inspector has been informed. }}\| ]]

ENS 48250 +/-
Where
Harris North Carolina (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
Time - Person (Reporting Time:+3.13 h0.13 days <br />0.0186 weeks <br />0.00429 months <br />)
Opened:	Justin Kelly 15:35 Aug 29, 2012
NRC Officer:	Howie Crouch
Last Updated:	Aug 29, 2012
48250 - NRC Website
v • d • e

v t e Emergency Notification System
Harris with 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness
WEEKMONTHYEAR2021-04-25T16:00:00 [Table view]
[ENS list for Harris]

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