05000458/FIN-2018012-03

Finding

Title

Failure to Establish Procedural Guidance for Determining Core Flow During Unanticipated Single Loop Operations

Description

The inspectors reviewed a self-revealed,non-cited violation of 10 CFR Part 50 Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the licensees failure to establish appropriate instructions in the abnormal operating procedure for thermal hydraulic instabilities. Specifically, the procedural step for determining core flow when in single loop operations at low power did not provide appropriate instructions to operators. As a result, station personnel could not conclusively determine core flow and inserted a manual reactor scram.

03
Site:	River Bend
Report	IR 05000458/2018012 Section 4OA3
Date counted	Jun 30, 2018 (2018Q2)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	J Sowa J Drake C Young M O'Banion B Parks J Kozalb Parksc Young J Drake J Kozal J Sowa M O'Banion
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion V
CCA	P.3, Resolution
INPO aspect	PI.3
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v • d • e

Finding - River Bend - IR 05000458/2018012

1(2)2(2)3(1)4(0)5(0)6(0)10(0)11(0)12(7)301(2)403(0)404(0)406(3)

IR 05000458/2018012: 1 2 3 4 5 6 7

Finding List (River Bend) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000458/FIN-2017003-01	2017Q3	H.6	Failure to Account for Delayed Closure of Isolation Valves in the Ultimate Heat Sink Inventory Analysis
05000458/FIN-2017003-02	2017Q3	H.5	Manual Reactor Scram Initiated in Response to Increase in Steam Pressure during Steam Leak Troubleshooting
05000458/FIN-2018001-01	2018Q1		Failure to Implement Procedure for Storage of Material in the Pools
05000458/FIN-2018001-02	2018Q1		Installation of an Incorrectly Specified Relay Causes Plant Transient and Reactor Scram
05000458/FIN-2018012-07	2018Q2		Failure to Perform 10 CFR 50.59 Evaluation for Main Feedwater System Sparger Nozzle Damage
05000458/FIN-2018012-02	2018Q2		Failure to Identify and Correct a Broken Feedwater Chemistry Probe
05000458/FIN-2018012-06	2018Q2		Failure to Provide Adequate Procedures for Post-Scram Recovery
05000458/FIN-2018012-05	2018Q2	H.9	Failure to Develop an Adequate Operational Decision-Making Issue for Compensatory Measures Related to a Degraded Condition of the Feedwater System Sparger Nozzles
05000458/FIN-2018012-03	2018Q2	P.3	Failure to Establish Procedural Guidance for Determining Core Flow During Unanticipated Single Loop Operations
05000458/FIN-2018012-01	2018Q2		Failure to Conduct Adequate Transient Snap Shot Assessment Following Recirculation Pump Trip
05000458/FIN-2018012-04	2018Q2		Failure to Submit a Licensee Event Report for a Manual Scram
05000458/FIN-2018002-01	2018Q2		Failure to Correct Inadequate Technical Specification Pressure Temperature Curves
05000458/FIN-2018002-02	2018Q2		Enforcement Action (EA)-18-053: Enforcement Discretion for Tornado-Generated Missile Protection Noncompliances
05000458/FIN-2018406-01	2018Q2		Security
05000458/FIN-2018406-02	2018Q2		Security

Self-Identified List (River Bend)

	Q	Title
05000458/FIN-2017404-01	2017Q3	Licensee-Identified Violation
05000458/FIN-2018406-03	2018Q2	Licensee-Identified Violation

[River Bend Findings full list]

05000458/FIN-2018012-03

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