05000249/FIN-2018003-01

Finding

Title

Failure to Follow Maintenance Procedures for Assembling Unit 3 HPCI Room Cooler Fan

Description

A self-revealing, Green non-cited violation (NCV) of Technical Specification (TS) 5.4, Procedures, was identified for the licensees failure to follow maintenance procedures DMP 570004, LPCI and HPCI Room Cooler Maintenance, and DEP 570004, HPCI Room Cooler Fan Preventive Maintenance, when assembling the Unit 3 HPCI room fan. Specifically, on one occasion when maintenance was performed on the fan, technicians installed the cam locking collar in the opposite direction of the fan shaft rotation, and on the other occasion, technicians tensioned the fan belt to the wrong value and misadjusted the alignment of the shaft sheave. Over time, this improper maintenance caused the inboard and outboard fan bearings to wear on the shaft, causing increased vibrations, and eventually leading to HPCI being declared inoperable to emergently work on the fan

01
Site:	Dresden
Report	IR 05000249/2018003 Section 1R15
Date counted	Sep 30, 2018 (2018Q3)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	A Nguyen R Elliott J Mancuso G Edwards J Cameron
Violation of:	Technical Specification Technical Specification - Procedures
CCA	H.7, Documentation
INPO aspect	WP.3
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v • d • e

Finding - Dresden - IR 05000249/2018003

13(0)1(1)2(0)3(2)4(0)5(0)6(0)10(0)11(0)12(1)14(0)410(0)411(0)

IR 05000249/2018003: 2 1

Finding List (Dresden) @ 2018Q3

CCA Matrix: 2018Q3

	Q	CCA	Title
05000237/FIN-2017004-01	2017Q4	H.9	Failure to Follow Procedure,Results in Non-Functional Fire Door
05000249/FIN-2018012-01	2018Q1		Failure to Ensure that Thermal Overload Relays are Sized Properly for Throttling Motor Operated Valves
05000237/FIN-2018001-01	2018Q1		Enforcement Action: EA18016: Unanalyzed Condition for Tornado Missiles
05000249/FIN-2018003-01	2018Q3	H.7	Failure to Follow Maintenance Procedures for Assembling Unit 3 HPCI Room Cooler Fan

Self-Identified List (Dresden)

	Q	Title
05000237/FIN-2018003-02	2018Q3	Licensee-Identified Violation

[Dresden Findings full list]

05000249/FIN-2018003-01

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