05000244/FIN-2018002-01

Finding

Title

Incorrect Scaling Factors in Reactor Vessel Level Monitoring System Instrumentation Uncertainty Calculation

Description

The inspectors identified a Green non-cited violation (NCV) of Title 10 of the Code of Federal Regulations (10 CFR) Part 50, Appendix B, Criterion III, Design Control, when Exelon failed to ensure that adequate design control measures existed to verify the adequacy of the Reactor Vessel Level Monitoring System (RVLMS) uncertainty calculation. Specifically, Exelon failed to identify errors in the RVLMS uncertainty calculation which resulted in a reasonable doubt of operability for the system after a temporary modification was implemented.

01
Site:	Ginna
Report	IR 05000244/2018002 Section 4OA2
Date counted	Jun 30, 2018 (2018Q2)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71152
Inspectors (proximate)	N Perry J Schussler H Anagnostopoulos J Furia K Kolaczyk J Lilliendahl L Dumont C Cahill
Violation of:	10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion III, Design Control
INPO aspect
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v • d • e

Finding - Ginna - IR 05000244/2018002

1(0)2(1)3(0)4(0)5(0)6(0)11(2)301(0)403(1)410(0)

IR 05000244/2018002: 1

Finding List (Ginna) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000244/FIN-2017004-01	2017Q4	H.12	Inadequate Component Monitoring Relating to Online Risk Management and Assessment
05000244/FIN-2018011-01	2018Q1		Potential Preconditioning of Turbine Driven Auxiliary Feedwater Surveillance Testing
05000244/FIN-2018011-02	2018Q1		Failure to Procedurally Verify Fuel Transfer Cart Results in Fuel Interference Event
05000244/FIN-2018002-01	2018Q2		Incorrect Scaling Factors in Reactor Vessel Level Monitoring System Instrumentation Uncertainty Calculation
05000244/FIN-2018403-01	2018Q2	H.14	Security

Self-Identified List (Ginna)

[Ginna Findings full list]

05000244/FIN-2018002-01

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