05000361/FIN-2012007-04

Finding

Title

Evaluation of Changes in Dimensional Controls During the Fabrication of Unit 2 and Unit 3 Replacement Steam Generators

Description

The team identified an unresolved item associated with the dimensional controls of critical dimensions throughout the fabrication of Unit 2 and Unit 3 replacement steam generators. Based on the information gathered by the team on the differences in dimensional controls of critical parameters in Unit 2 and Unit 3 replacement steam generators, the team determined that Mitsubishi did not consider the potential impact of improving dimensional controls for tube roundness and anti-vibration bars on the final tube bundle clearances at normal operating conditions. Additional review by the NRC is required following completion of Mitsubishis cause evaluation to fully assess how the dimensional controls contributed to the tube-to-tube wear in Unit 3 and then determine whether this issue represents a performance deficiency or constitutes a violation of NRC requirements.

04
Site:	San Onofre
Report	IR 05000361/2012007 Section 4OA5
Date counted	Jun 30, 2012 (2012Q2)
Type:	URI:
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 93800
Inspectors (proximate)	C Thurston E Collins E Murphy J Ortega Luciano J Reynoso J Rivera Ortiz A Johnsona Howellc Thurston E Murphy G Warrier G Werner J Billoue J Reynoso M Bloodgood R Lantz V Dhir
INPO aspect
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v • d • e

Finding - San Onofre - IR 05000361/2012007

2(7)3(6)4(3)5(1)6(0)7(10)8(0)9(2)10(3)301(0)403(2)404(1)405(1)406(0)20(0)5(0)

IR 05000361/2012007: 1 2 3 4 5 6 7 8 9 10

Finding List (San Onofre) @ 2012Q2

CCA Matrix: 2012Q2

	Q	CCA	Title
05000361/FIN-2011004-01	2011Q3	H.7	Failure to Maintain Emergency Core Cooling System Valves in Required Positions
05000361/FIN-2011004-02	2011Q3		Failure to Provide Adequate Flood Protection for the Auxiliary Feedwater Steam Supply Piping
05000361/FIN-2011004-03	2011Q3	H.14	Failure to Incorporate Calculation Results into Plant Procedures
05000361/FIN-2011004-04	2011Q3	H.8	Failure to Perform Plant Modification in Accordance with Applicable Specifications
05000361/FIN-2011010-01	2011Q3		Inadequate Assessment of Seismic Qualification of Emergency Diesel Generator Buried Fuel Oil Tanks
05000361/FIN-2011010-02	2011Q3		Failure to Evaluate that Sufficient Voltage would be Available at the Emergency Diesel Generator Air Start Solenoid
05000361/FIN-2011010-03	2011Q3		Failure to Incorporate Design Requirements into Procedures and Instructions
05000361/FIN-2011010-04	2011Q3		Failure to Evaluate the Effects of Fuse Resistance and High Energy Line Break Conditions on Control Circuit Voltage.
05000361/FIN-2011010-05	2011Q3	H.6	Failure to Maintain Equipment Important to Safety
05000361/FIN-2011010-06	2011Q3		Failure to Adequately Control Document Changes
05000361/FIN-2011403-01	2011Q3		Security
05000361/FIN-2011005-01	2011Q4	H.7	Failure to Control Work in a High Radiation Area
05000361/FIN-2011005-02	2011Q4	H.13	Failure to Implement Required Compensatory Measures Resulted in Inoperable Condensate Storage Tank
05000361/FIN-2011005-03	2011Q4	H.7	Failure to Correct Degraded Plant Equipment Results in an Ammonia Spill
05000361/FIN-2012002-03	2012Q1	H.5	Failure to Control Work Activities and Prevent RCS Perturbations
05000361/FIN-2012405-01	2012Q1	H.2	Security
05000361/FIN-2012002-01	2012Q1	P.1	Failure to Maintain Seismic Controls in Safety-Related Areas
05000361/FIN-2012002-02	2012Q1		Failure to Implement Timely Corrective Actions on Safety-Related Pumps
05000361/FIN-2012007-01	2012Q2		Adequacy of the Trip/Transient and Event Review Procedure
05000361/FIN-2012007-10	2012Q2		Evaluation of Departure of Method of Evaluation for 10 CFR 50.59 Processes
05000361/FIN-2012007-09	2012Q2		Evaluation of the Effects of Divider Plate Weld Repairs in Unit 3 Replacement Steam Generators
05000361/FIN-2012007-08	2012Q2		NON-CONSERVATIVE THERMAL-HYDRAULIC Model Results
05000361/FIN-2012007-07	2012Q2		Unit 3 Steam Generator 3E0-88 Stresses Related to Handling
05000361/FIN-2012007-06	2012Q2		Shipping Requirements Not in Accordance with Design and Fabrication Specifications
05000361/FIN-2012007-05	2012Q2		Shipping Requirements Not in Accordance with Industry Standards
05000361/FIN-2012007-04	2012Q2		Evaluation of Changes in Dimensional Controls During the Fabrication of Unit 2 and Unit 3 Replacement Steam Generators
05000361/FIN-2012007-03	2012Q2		Evaluation of Retainer Bars Vibration During the Original Design of the Replacement Steam Generators
05000361/FIN-2012007-02	2012Q2		Evaluation of Unit 3 Vibration and Loose Parts Monitoring System Alarms
05000361/FIN-2012403-02	2012Q2	H.8	Security
05000361/FIN-2012003-05	2012Q2	H.14	Failure to Follow Battery Testing Procedure for Battery Exceeding 85% Service Life
05000361/FIN-2012003-04	2012Q2	H.8	Failure to Follow Design Control Procedures
05000361/FIN-2012003-03	2012Q2	H.8	Failure to Maintain Foreign Material Exclusion Controls During Maintenance
05000361/FIN-2012003-02	2012Q2	P.1	Failure to Maintain Foreign Material Exclusion Controls in SAFETY-RELATED Components
05000361/FIN-2012003-01	2012Q2	H.9	Degraded Fire Barrier Separating Unit 2 Shutdown Cooling Heat Exchanger Rooms
05000361/FIN-2012403-01	2012Q2	H.7	Security

Self-Identified List (San Onofre)

	Q	Title
05000361/FIN-2011004-05	2011Q3	Licensee-Identified Violation
05000361/FIN-2011004-06	2011Q3	Licensee-Identified Violation
05000361/FIN-2011403-02	2011Q3	Security
05000361/FIN-2011005-05	2011Q4	Licensee-Identified Violation
05000361/FIN-2011005-04	2011Q4	Licensee-Identified Violation
05000361/FIN-2012002-04	2012Q1	Licensee-Identified Violation
05000361/FIN-2012002-07	2012Q1	Licensee-Identified Violation
05000361/FIN-2012002-05	2012Q1	Licensee-Identified Violation
05000361/FIN-2012002-06	2012Q1	Licensee-Identified Violation
05000361/FIN-2012003-06	2012Q2	Licensee-Identified Violation

[San Onofre Findings full list]

05000361/FIN-2012007-04

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