05000321/FIN-2016003-01

Finding

Title

Unit Downpower Caused by RFP Vent Line Failure

Description

A self-revealing finding was identified when the licensee failed to install a reactor feed pump (RFP) vent line weld in accordance with plant procedures resulting in a failure that required an unplanned Unit 1 power reduction greater than 20%. Failure to install the correct weld thickness on the unit 1 B RFP vent line, as required by procedures, was a performance deficiency. This performance deficiency was more than minor because it was associated with the Equipment Performance attribute of the Initiating Events cornerstone and adversely affected the cornerstone objective in that an unplanned reactor power reduction was required from 100 percent to 60 percent RTP. The inspectors determined this finding was of very low safety significance (Green) because there was not a reactor trip or loss of mitigation equipment. The inspectors determined that this finding had a cross-cutting aspect in the Resolution aspect of the problem identification and resolution area, because the organization did not take effective corrective actions to address the previous weld configuration issue. [P.3]

01
Site:	Hatch
Report	IR 05000321/2016003 Section 1R12
Date counted	Sep 30, 2016 (2016Q3)
Type:	Finding: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.12
Inspectors (proximate)	B Collins D Hardage D Lanyi D Retterer M Donithan S Sandal
CCA	P.3, Resolution
INPO aspect	PI.3
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v • d • e

Finding - Hatch - IR 05000321/2016003

1(1)2(3)3(2)4(1)5(0)6(0)7(2)8(4)9(0)10(2)11(0)201(0)301(0)403(0)404(1)405(0)406(0)501(0)

IR 05000321/2016003: 1 2

Finding List (Hatch) @ 2016Q3

CCA Matrix: 2016Q3

	Q	CCA	Title
05000366/FIN-2015007-01	2015Q4		Failure to Perform Adequate Circuit Breaker As-Found Testing
05000366/FIN-2015007-02	2015Q4	P.2	Failure to Correct Nonconformances with Regulatory Guide 1.9-1971
05000321/FIN-2015007-03	2015Q4		Failure to Assure that Class 1E Components were Qualified for Design Temperatures
05000321/FIN-2015007-04	2015Q4		Failure to Verify Design Basis Timing Margins for Safety Related Motor Operated Valves
05000366/FIN-2015007-05	2015Q4		Failure to Classify RCIC Sub-components as Safety-Related
05000321/FIN-2016001-01	2016Q1		Reactor Coolant System N2E Weld Flaw
05000321/FIN-2016007-02	2016Q2		Passive Fire Protection
05000321/FIN-2016002-01	2016Q2	H.1	Failure to Implement Maintenance Procedure for Control Room Air Conditioning System
05000321/FIN-2016007-01	2016Q2	P.2	Failure to provide reasonable assurance that Appendix R time critical operator actions (TCOAs) can be completed in a timely manner
05000321/FIN-2016002-03	2016Q2		Performance of Operations with Potential to Drain the Reactor Vessel (OPDRV) Without Secondary Containment
05000321/FIN-2016008-04	2016Q2		Potential departure from protection system design basis
05000321/FIN-2016008-03	2016Q2	H.2	Failure to Control Qualification of Purchased 1E Components in Accordance to IEEE 323- 1974
05000321/FIN-2016008-02	2016Q2	P.2	Failure to identify a condition adverse to quality for Masterpact 600V breakers
05000321/FIN-2016008-01	2016Q2	H.9	Failure to Adequately Qualify Modifications to Class 1E 4160V Buses
05000321/FIN-2016010-02	2016Q2	H.11	Failure to Identify N2E Nozzle Weld Through-Wall Flaw
05000321/FIN-2016010-01	2016Q2		Inaccurate Information Provided Regarding N2E Nozzle Weld Overlay
05000321/FIN-2016404-01	2016Q3		Security
05000321/FIN-2016003-02	2016Q3	H.13	Failure to Ensure Work Hours are Within Work Hour Limits
05000321/FIN-2016003-01	2016Q3	P.3	Unit Downpower Caused by RFP Vent Line Failure

Self-Identified List (Hatch)

	Q	Title
05000321/FIN-2016002-02	2016Q2	Licensee-Identified Violation

[Hatch Findings full list]

05000321/FIN-2016003-01

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