05000456/FIN-2012003-02

Finding

Title

Steam Generator Primary Manway Bolts Examined with Unqualified Procedure

Description

A finding of very low safety significance (Green) and an associated NCV of 10 CFR 50.55a(g)4 was identified by the inspectors when licensee personnel failed to establish an ultrasonic test (UT) examination procedure for steam generator primary manway bolts qualified in accordance with the American Society of Mechanical Engineers (ASME) Code,Section XI. Specifically, the licensee failed to determine a limit for maximum scan speed and incorporate this limit into the ultrasonic examination procedure applied to the steam generator primary side manway bolting. The licensee entered this issue into the CAP as IR 1359195 and performed a procedure performance demonstration to qualify the maximum scan speed allowed for the UT examination of manway bolts. The performance deficiency was determined to be more than minor because the issue, if left uncorrected, would become a more significant safety concern. Absent NRC identification, the absence of a scan speed could have allowed service induced cracks to go undetected. Undetected cracks would place the steam generator primary manway closure bolting at increased risk for failure, which would affect the pressure retaining integrity of the Reactor Coolant System (RCS) and pose an increased risk for through-wall leakage and/or failure. Because the licensee promptly corrected this issue before unacceptable flaws were returned to service, the inspectors answered No to the Significance Determination Process Phase I screening question Assuming worst case degradation, would the finding result in exceeding the Tech Spec [Technical Specification] limit for any RCS leakage or could the finding have likely affected other mitigation systems resulting in a total loss of their safety function assuming the worst case degradation? Therefore, this finding screened as having very low safety significance (Green). This finding had a cross-cutting aspect in the Decision-Making component of the Human Performance cross-cutting area because the licensee did not implement conservative assumptions regarding a UT essential variable when creating the UT procedure and demonstrating that procedure. Specifically, the licensee staff failed to understand the significance of establishing a scanning speed into the UT procedure and recording the scanning speed during the procedure demonstration.

02
Site:	Braidwood
Report	IR 05000456/2012003 Section 1R08
Date counted	Jun 30, 2012 (2012Q2)
Type:	NCV: Green
cornerstone	Initiating Events
Identified by:	NRC identified
Inspection Procedure:	IP 71111.08
Inspectors (proximate)	M Perry R Ng R Walton T Go A Garmoe A Shaikh B Metrow E Duncan J Benjamin M Holmberg
CCA	H.14, Conservative Bias
INPO aspect	DM.2
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v • d • e

Finding - Braidwood - IR 05000456/2012003

12(1)12(0)12(1)12(1)12(0)12(1)12(1)12(1)12(1)1(0)2(6)3(8)4(6)5(8)7(4)8(2)9(0)12(1)402(0)403(0)404(1)501(0)503(0)9(0)22(0)1(0)15(0)

IR 05000456/2012003: 1 2 3 4 5 6 7 8

Finding List (Braidwood) @ 2012Q2

CCA Matrix: 2012Q2

	Q	CCA	Title
05000456/FIN-2011004-04	2011Q3		Operability Evaluation Not Performed in Accordance with Station Standards
05000456/FIN-2011004-06	2011Q3		Modification of the Auxiliary Feedwater System Without Prior NRC Approval
05000456/FIN-2011004-02	2011Q3		Use of Mesh Strainer Bags in Auxiliary Building Floor Drains
05000456/FIN-2011008-02	2011Q3		Permanent Lead Shielding added to Safety Injection and Chemical Volume and Control System Piping.
05000456/FIN-2011008-01	2011Q3		Embedment Plate Design Deficiencies
05000456/FIN-2011004-01	2011Q3	H.2	Failure to Adhere to Standards of Outdoor Secured Material Zones
05000456/FIN-2011004-03	2011Q3		Failure to Control High Energy Line Break Barrier Doors
05000456/FIN-2011004-05	2011Q3	P.2	Asiatic Clams Identified in the Essential Service Water System Supply to the Auxiliary Feedwater System
05000456/FIN-2011004-07	2011Q3	P.5	Modification of the Auxiliary Feedwater System Without Prior NRC Approval
05000456/FIN-2011004-08	2011Q3	H.7	Failure to Follow Maintenance Rule Procedure
05000456/FIN-2011004-09	2011Q3		Design of Auxiliary Feedwater System Included Voids in Safety-Related Alternate Suction Flow Paths
05000456/FIN-2011001-02	2011Q4		Failure to Follow Procedures to Ensure Multi Purpose Canister Design Basis Pressure is Not Exceeded
05000456/FIN-2011005-06	2011Q4	H.7	Failure to Adhere to Maintenance Rule Implementaion Procedures
05000456/FIN-2011005-05	2011Q4	P.5 P.2(b)	Failure to Follow and Establish Adequate Hazard Barrier Impairment Procedures
05000456/FIN-2011005-02	2011Q4		Failure to Evaluate CQ System Performance Against Maintenance Rule Criteria
05000456/FIN-2011001-01	2011Q4		Failure to Perform Adequate Evaluations to Facilitate Independent Spent Fuel Storage Installation Activities
05000456/FIN-2011005-03	2011Q4		Failure to Submit Licensee Event Report Per 10 CFR 50.73(a)(2)(vii)
05000456/FIN-2011005-07	2011Q4		Failure to Perform Adequate Evaluations to Facilitate Independent Spent Fuel Storage Installation Activities
05000456/FIN-2011005-08	2011Q4		Failure to Follow Procedures Adequate Evalations to Facilitate Independent Spent Fuel Storage Installation Activities
05000456/FIN-2011005-04	2011Q4	P.2	Operability Evaluation Not Performed in Accordance with Station Standards
05000456/FIN-2011005-01	2011Q4	H.13	Failure to Maintain Adequate Circulating Water Blowdown Procedure During Liquid Radiological Releases
05000456/FIN-2012002-01	2012Q1		Failure to Maintain Approved Fire Protection Program Regarding Safe Shutdown Fire Damper Qualification
05000456/FIN-2012002-06	2012Q1		Inadequate Safety-Related 4kV Undervoltage Protection
05000456/FIN-2012002-04	2012Q1		Maintenance Rule Performance Monitoring of HELB Dampers
05000456/FIN-2012002-05	2012Q1		Incorrect Classification of Environmental Qualification Zones
05000456/FIN-2012002-03	2012Q1		Failure to Scope Safety-Related HELB Barriers Into the Maintenance Rule
05000456/FIN-2012002-02	2012Q1	P.2	Failure to Promptly Correct Conditions Adverse to Quality
05000456/FIN-2012003-02	2012Q2	H.14	Steam Generator Primary Manway Bolts Examined with Unqualified Procedure
05000456/FIN-2012003-03	2012Q2	H.5	Failure to Accomplish Corrective Actions Following Identified Boric Acid Leakage on Reactor Head Penetration No. 77
05000456/FIN-2012003-04	2012Q2	H.13	Operability Determination Standards Not Followed for HELB Related Structural Issues Identified by the NRC
05000456/FIN-2012007-01	2012Q2	H.14	Non-Conforming Piping Condition Not Corrected
05000456/FIN-2012007-02	2012Q2	H.8	Surveillance Procedure Not Followed
05000456/FIN-2012007-03	2012Q2	P.3	Untimely Completion of a Corrective Action to Prevent Recurrence
05000456/FIN-2012007-04	2012Q2	P.5 P.2(a)	Failure to Follow Corrective Action Program Procedure
05000456/FIN-2012003-05	2012Q2		Licensees Position Regarding TS 3.6.3 Applicability to Main Steam Isolation Valves
05000456/FIN-2012003-06	2012Q2		MSIV Hydraulic System Design
05000456/FIN-2012003-07	2012Q2		Removal of TRM 3.3.y Requirement Via 10 CFR 50.59 Evaluation
05000456/FIN-2012003-01	2012Q2	H.1	Failure to Implement Abnormal Operating Procedures When Entry Conditions Were PresentFailure to Implement Abnormal Operating Procedures When Entry Conditions Were Present

Self-Identified List (Braidwood)

	Q	Title
05000456/FIN-2011005-09	2011Q4	Licensee-Identified Violation
05000456/FIN-2011005-10	2011Q4	Licensee-Identified Violation
05000456/FIN-2011406-01	2011Q4	Security
05000456/FIN-2012003-08	2012Q2	Licensee-Identified Violation

[Braidwood Findings full list]

05000456/FIN-2012003-02

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