05000461/FIN-2018001-01

Finding

Title

Failure to Follow Procedure Results in Unplanned Reactor Core Isolation Cooling Unavailability

Description

A self-revealed Green finding and associated Non-Cited Violation of Title 10 of the Code of Federal Regulations (CFR) Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, was identified when the licensee failed to follow station procedure Clinton Power Station (CPS) 9030.01C034, RCIC [Reactor Core Isolation Cooling] Steam Line Flow E31N683A(B), E31N684A(B), Checklist. Specifically, the licensee failed to reset the isolation logic for the RCIC steam line outboard isolation valve prior to turning on the breaker for this valve. This resulted in the isolation of the steam supply to RCIC causing RCIC to become unavailable,and elevating the plant risk to Yellow.

01
Site:	Clinton
Report	IR 05000461/2018001 Section 1R22
Date counted	Mar 31, 2018 (2018Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.22
Inspectors (proximate)	W Schaup E Sanchez L Rodriguez C Phillips S Mischke K Stoedter
Violation of:	10 CFR 50 Appendix B Criterion V
INPO aspect	LA.5
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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-2018001-01

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