05000254/FIN-2018001-03

Finding

Title

Half Scram Due to Low Voltage on 24/48 Vdc System

Description

A finding of very low safety significance (Green) and a Non-Cited Violation of Technical Specification 5.4.1, Procedures, was self-revealed on January 11, 2018, for the licensees failure to perform an equalizing charge on the Unit 1B 24/48 Vdc battery prior to returning the 24/48 Vdc battery to a normal configuration following a test discharge, which was required by station procedures. The failure to follow procedures led to a low voltage condition and caused a Unit 1B channel half scram in the reactor protection system.

03
Site:	Quad Cities
Report	IR 05000254/2018001 Section 4OA2
Date counted	Mar 31, 2018 (2018Q1)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	NRC identified
Inspection Procedure:	IP 71152
Inspectors (proximate)	R Murray K Carrington S Bell B Bergeon M Domke M Holmberg J Neurauter C Mathews L Torres K Stoedter
Violation of:	Technical Specification
INPO aspect	WP.1
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v • d • e

Finding - Quad Cities - IR 05000254/2018001

1(4)2(1)3(2)4(0)5(0)6(0)10(2)11(0)301(0)410(0)411(0)412(0)503(0)

IR 05000254/2018001: 1 3 4 2

Finding List (Quad Cities) @ 2018Q1

CCA Matrix: 2018Q1

	Q	Title
05000254/FIN-2017004-01	2017Q4	Repeat Use of Written Exams during Licensed Operator Requalification Examinations
05000254/FIN-2018001-01	2018Q1	Repeat Use of Written Exams During Licensed Operator Requalification Examinations
05000265/FIN-2018001-02	2018Q1	Failure to Establish Design Standard for Unit 2 Residual Heat Removal Service Water Pumps
05000254/FIN-2018001-03	2018Q1	Half Scram Due to Low Voltage on 24/48 Vdc System
05000254/FIN-2018001-04	2018Q1	Enforcement Action: EA18021: EDG Non-conformance for Tornado Missiles (EGM 15002)

Self-Identified List (Quad Cities)

[Quad Cities Findings full list]

05000254/FIN-2018001-03

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