05000348/FIN-2018002-05

Finding

Title

Failure of a Main Steam Isolation Valve on the C Steam Line

Description

A green self-revealed NCV of Technical Specifications 5.4.1, Procedures was identified for the failure of the licensee to provide adequate procedural guidance in FNP-0-MP-39.0, Main Steam Isolation Valve Disassembly and Reassembly to maintenance personnel for assembling the main steam isolation valve (MSIV) disc arm to the disc. As a result, MSIV 3370C failed, which resulted in partial blockage of the C steam line on March 25, 2018, while the plant was operating at approximately full rated power. The valve disc in the swing-type MSIV separated from the disc arm and fell into the steam flow path. Specifically, the four bolts holding the disc to the arm broke, due to disc to disc arm fluttering, as a result of improper assembly.

05
Site:	Farley
Report	IR 05000348/2018002 Section 4OA2
Date counted	Jun 30, 2018 (2018Q2)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71152
Inspectors (proximate)	P Niebaum K Miller R Carrion A Nielsen W Pursley J Rivera D Mas-Penaranda A Blamey
Violation of:	Technical Specification - Procedures
CCA	H.1, Resources
INPO aspect	LA.1
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v • d • e

Finding - Farley - IR 05000348/2018002

1(3)2(8)3(2)4(0)5(0)10(0)11(1)12(0)13(1)14(2)410(0)411(0)6(0)

IR 05000348/2018002: 1 2 3 4 5 6 7 8

Finding List (Farley) @ 2018Q2

CCA Matrix: 2018Q2

	Q	CCA	Title
05000364/FIN-2017003-01	2017Q3	H.14	Failure to perform adequate corrective maintenance on the 2B EDG
05000348/FIN-2017009-01	2017Q4		Failure to Report a Condition Which was Prohibited by Technical Specifications
05000364/FIN-2017004-01	2017Q4	P.2	Failure to Evaluate Impacts on the 2C RCP Oil Collection System
05000364/FIN-2017004-02	2017Q4	H.6	Failure to maintainan operable Oil Collection System on RCP 2B
05000348/FIN-2017004-03	2017Q4	H.12	Failure to Follow Procedure Resulted in Inoperable TDAFW pump
05000348/FIN-2017009-02	2017Q4	H.8	Failure to Complete Corrective Action to Preclude Repetition of a Significant Conditions Adverse to Quality
05000364/FIN-2018001-03	2018Q1		Enforcement Action (EA)-18-026:Unit 2 Pressurizer Safety Valve Lift Pressure Outside of Technical Specification Tolerance Band
05000364/FIN-2018001-02	2018Q1		Enforcement Action (EA)-18-025:Unit 2 Main Steam Safety Valve (MSSV) Lift Pressure Outside of Technical Specification Limits
05000364/FIN-2018001-01	2018Q1		Failure to conduct an In-Service Testing (IST)surveillance on the 2B charging pump discharge check valve
05000348/FIN-2018002-01	2018Q2	H.1	High vibrations on the 1B Charging pump
05000348/FIN-2018002-02	2018Q2	P.3	Failure to develop adequate PM for diesel generator relays
05000348/FIN-2018002-05	2018Q2	H.1	Failure of a Main Steam Isolation Valve on the C Steam Line
05000348/FIN-2018002-03	2018Q2	H.1	Failure to Calibrate Portable Radiation Survey Instruments
05000348/FIN-2018002-04	2018Q2	H.10	Failure to implement timely corrective actions for charging pump discharge check valves
05000348/FIN-2018013-01	2018Q2	H.5	Interference with the operation of a respirator
05000348/FIN-2018014-01	2018Q2		Failure to Complete System Operator Rounds as Required per Procedures
05000348/FIN-2018014-02	2018Q2		Failure to Provide Complete and Accurate Information Related to System Operator Rounds

Self-Identified List (Farley)

	Q	Title
05000348/FIN-2017004-04	2017Q4	Licensee-Identified Violation
05000348/FIN-2018002-06	2018Q2	Licensee-Identified Violation
05000348/FIN-2018002-07	2018Q2	Licensee-Identified Violation
05000348/FIN-2018002-08	2018Q2	Licensee-Identified Violation

[Farley Findings full list]

05000348/FIN-2018002-05

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