05000461/FIN-2018001-02

Finding

Title

Failure to Identify a Single Point Vulnerability Results in Manual Reactor Scram

Description

A self-revealed Green finding was identified for the licensees failure to identify a single point vulnerability in accordance with procedure ERAA2004, Revision 1. Specifically, during a site single point vulnerability review of the feedwater system, the licensee failed to identify a single point vulnerability that subsequently resulted in a loss of a feedwater heating string. The loss of the heater string caused a drop in temperature in the reactor of 100 degrees which prompted a manual scrambe initiated by the operators

02
Site:	Clinton
Report	IR 05000461/2018001 Section 4OA3
Date counted	Mar 31, 2018 (2018Q1)
Type:	Finding: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	W Schaup E Sanchez L Rodriguez C Phillips S Mischke K Stoedter
INPO aspect
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v • d • e

Finding - Clinton - IR 05000461/2018001

1(2)2(5)3(2)4(0)5(0)6(0)10(0)11(0)41(0)50(3)51(0)90(0)91(0)92(0)301(0)410(0)412(1)

IR 05000461/2018001: 1 2

Finding List (Clinton) @ 2018Q1

CCA Matrix: 2018Q1

	Q	CCA	Title
05000461/FIN-2017201-01	2017Q3	H.5	Security
05000461/FIN-2017007-01	2017Q3	H.1	Failure to Evaluate Defeating Reactor Core Isolation Cooling System Interlocks and Trips before Adding Them to an Emergency Operating Support Procedure
05000461/FIN-2017003-01	2017Q3	H.6	MSIV TS Leakage Limits Exceeded Due to Condition Based Maintenance Approach
05000461/FIN-2017003-02	2017Q3	H.1	Failure to Adequately Control Access in Locked High Radiation Area
05000461/FIN-2017003-03	2017Q3	H.13	Failure to Perform Engineering Evaluation to Determine the Cause of Failure of Snubbers
05000461/FIN-2017003-04	2017Q3	H.14	Flow Control Valves Not Locked Out Results in Reactor Recirculation Pump Runback
05000461/FIN-2017003-05	2017Q3	H.9	Failure to Establish Secondary Containment Prior to Entering MODE 2
05000461/FIN-2017009-01	2017Q3	H.11	Failure to Evaluate Replacement Relay Dropout Voltage
05000461/FIN-2017012-02	2017Q4	H.13	Failure to Properly Classify Non-Safety Related Auxiliary Transformers as Operationally Critical Components
05000461/FIN-2017004-04	2017Q4		Failure to Perform an Evaluation in Accordance with 10 CFR 72.48 for Changes Made to the Time-to-Boil Calculation
05000461/FIN-2017004-03	2017Q4	H.8	Failure to Identify the Extent of Condition for an Inadequate 10 CFR 50.59 Evaluation
05000461/FIN-2017004-02	2017Q4	H.5	Failure to Assess and Manage Risk Associated with the Performance of Control Rod Time Testing
05000461/FIN-2017004-01	2017Q4	H.5	Reactor Down Power due to Reactor Recirculation Pump Motor Lower Bearing Oil Leak
05000461/FIN-2017011-01	2017Q4	P.2	Failure to Correct an Identified Degraded Condition on the Division 3 Shutdown Service Water Pump
05000461/FIN-2017012-03	2017Q4		Evaluation of RCE 04082490, Reactor Scram from Trip of 1AP07EJ)
05000461/FIN-2017012-01	2017Q4	H.5	Failure to Perform a Corrective Action to Prevent Recurrence
05000461/FIN-2018001-01	2018Q1		Failure to Follow Procedure Results in Unplanned Reactor Core Isolation Cooling Unavailability
05000461/FIN-2018001-02	2018Q1		Failure to Identify a Single Point Vulnerability Results in Manual Reactor Scram

Self-Identified List (Clinton)

[Clinton Findings full list]

05000461/FIN-2018001-02

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