05000482/FIN-2018001-01

Finding

Title

Inadequate Functionality Assessment Associated with the Emergency Excess Letdown Flowpath

Description

The inspectors identified a Green finding and associated non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, when the licensee failed to adequately implement the operability determination and functionality assessment procedure. Specifically, the licensee failed to document a functionality assessment of sufficient scope to address the capability of a safety-related excess letdown heat exchanger to pressurizer relief tank isolation valve and the excess letdown system to perform their specified safety functions, which resulted in the licensee failing to recognize that two independent Technical Requirements Manual required boration injection subsystems were not functional.

01
Site:	Wolf Creek
Report	IR 05000482/2018001 Section 1R15
Date counted	Mar 31, 2018 (2018Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	D Dodson F Thomas D Bradley N Taylor
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion V
INPO aspect	DM.2
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v • d • e

Finding - Wolf Creek - IR 05000482/2018001

1(1)2(3)3(2)4(0)5(0)6(0)7(2)8(0)10(5)11(0)201(4)403(0)404(0)440(0)

IR 05000482/2018001: 1

Finding List (Wolf Creek) @ 2018Q1

CCA Matrix: 2018Q1

	Q	CCA	Title
05000482/FIN-2017407-01	2017Q3	H.1	Security
05000482/FIN-2017003-01	2017Q3		Programmatic Failure to Scope Floor Drain Function within the Maintenance Rule Monitoring Program
05000482/FIN-2017003-02	2017Q3	P.2	Failure to Ensure the Design Basis was Adequately Represented in the Technical Specification Bases
05000482/FIN-2017003-03	2017Q3	H.1	Failure to Verify Equipment or Systems are Capable of Performing Their Intended Design Function Following Maintenance
05000482/FIN-2017003-04	2017Q3	H.1	Failure to Verify Equipment or Systems are Capable of Performing Their Intended Design Function Following Maintenance
05000482/FIN-2017008-01	2017Q4		InadequateEvaluation of Spurious Valve Operation
05000482/FIN-2017008-02	2017Q4	H.9	Failure to Provide Adequate Emergency Lighting
05000482/FIN-2018001-01	2018Q1		Inadequate Functionality Assessment Associated with the Emergency Excess Letdown Flowpath

Self-Identified List (Wolf Creek)

[Wolf Creek Findings full list]

05000482/FIN-2018001-01

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