05000275/FIN-2010004-05

Finding

Title

Inadequate Design Control for the Auxiliary Saltwater System

Description

The inspectors identified a Green noncited violation of I O CFR Part 50, Appendix B, Criterion Ill, Design Control, involving the failure to maintain adequate design control measures associated with the auxiliary saltwater system. The inspectors identified that the auxiliary saltwater system design did not comply with the plant design bases as described the Final Safety Analysis Report Update. Specifically, an auxiliary saltwater vent line did not meet the requirements established of General Design Criteria 1, Quality Standards and Records, and Regulatory Guide 1.26, Quality Group Classifications and Standards for Water, Steam, and Radioactive Waste Containing Components of Nuclear Power Plants. The licensee entered the performance deficiency into the corrective action program as Notification 50328942. This performance deficiency is greater than minor because the design control attribute of the mitigating systems cornerstone and the cornerstones objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences were affected. Using the Significance Determination Process (SDP) Phase 1 Screening Worksheet for the Mitigating Systems Cornerstone, the inspectors concluded the finding was of very low significance (Green) because it was a design deficiency confirmed not to result in the loss of operability or functionality. The inspectors concluded that the finding does not have a crosscutting aspect since the performance deficiency is not reflective of current plant performance.

05
Site:	Diablo Canyon
Report	IR 05000275/2010004 Section 1R15
Date counted	Sep 30, 2010 (2010Q3)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	G Guerra M Brown M Peck P Elkmann D Allen E Schrader
INPO aspect
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v • d • e

Finding - Diablo Canyon - IR 05000275/2010004

1(0)2(6)3(4)4(5)5(12)6(5)7(11)8(0)201(7)301(0)402(2)403(2)501(0)28(0)

IR 05000275/2010004: 1 2 3 4 5

Finding List (Diablo Canyon) @ 2010Q3

CCA Matrix: 2010Q3

	Q	CCA	Title
05000275/FIN-2009005-04	2009Q4	P.1 P.1(a)	Less than Adequate Replacement Reactor Head Modification Design Control
05000275/FIN-2009005-01	2009Q4	H.4 H.9	Less Than Adequate Work Planning Resulted in the Release of Two Gas Decay Tanks
05000275/FIN-2009005-03	2009Q4	P.2	Inadequate 50.59 Evaluation for Steam Generator Tube Rupture Analysis
05000275/FIN-2009005-05	2009Q4	P.2	Less than Adequate Change Evaluation to the Facility as Described in the Final Safety Analysis Report Update
05000275/FIN-2009005-02	2009Q4	H.5	Failure to Properly Plan a Maintenance Activity
05000275/FIN-2010002-04	2010Q1	P.2	Less Than Adequate Evaluation Following a Failure of Both Motor Driven Auxiliary Feedwater Trains
05000275/FIN-2010402-02	2010Q1		Security
05000275/FIN-2010402-01	2010Q1		Security
05000275/FIN-2010002-01	2010Q1	P.3	Failure to Effectively Implement the Seismically-Induced Systems Interaction Program
05000275/FIN-2010002-05	2010Q1	P.2	Failure to Submit a LERE for a Common-Cause Inoperability of Independent Trains or Channels
05000275/FIN-2010002-03	2010Q1		Failure to Report a Condition That Could Have Prevented the Fulfillment of a Safety Function
05000323/FIN-2009009-03	2010Q1	P.2	Failure to Evaluate a Change to the Facility as Described in the Final Safety Analysis Report Update Associated with the Addition of Manual Actions in the Safety Analysis
05000275/FIN-2010002-02	2010Q1	P.2	Failure to Update the Final Safety Analysis Report with the Current Plant Design Bases
05000323/FIN-2009009-02	2010Q1	P.2 P.1(a)	Failure to Conduct an Adequate Post-Modification Test
05000323/FIN-2009009-01	2010Q1	P.2	Failure to Follow Design and Configuration Control Requirements
05000275/FIN-2010003-03	2010Q2	P.2	Failure to Report a Condition that Could Have Prevented the Fulfillment of a Safety Function
05000275/FIN-2010007-03	2010Q2	H.14	Non-Conservative Decision Making resulted in a Violation of Technical Specification
05000275/FIN-2010007-05	2010Q2	P.2	Inadequate Operability Determination Associated With the Offsite Degraded Voltage Protection Scheme
05000275/FIN-2010007-06	2010Q2		Second Level Undervoltage Relay Time Delay to Initiate Load Shed and Sequencing Upon the Diesel Generator is Adequate to Assure Plant Safety
05000275/FIN-2010007-08	2010Q2	P.2	Inadequate Drawings and Procedures to Align Emergency Makeup Water Supply from Diablo Canyon Creek to Support the Auxiliary Feedwater System
05000275/FIN-2010003-01	2010Q2	P.2	Failure to Perform Unit 1 Containment Concrete Inspections
05000275/FIN-2010003-02	2010Q2		Inadequate Corrective Actions Following Identification of a Nonconservative Technical Specification
05000275/FIN-2010007-07	2010Q2		Nonconservative Inputs into Motor Operated Valve Calculation
05000275/FIN-2010007-10	2010Q2		Failure to Update Text to Reflect Credited Design Class I Makeup Flowpath to Component Cooling Water Expansion Tank in the Final Safety Analysis Report Update
05000275/FIN-2010007-09	2010Q2		Failure to Update Feedwater Rupture Accident Analysis in the Final Safety Analysis Report Update
05000275/FIN-2010007-04	2010Q2	P.2	Failure to Update the Final Safety Analysis Report Update with the Current Plant Design Bases Section
05000275/FIN-2010007-02	2010Q2	P.2	Failure to Adequately Evaluate Changes to the Diesel Testing as Described in the Final Safety Analysis Report Update
05000275/FIN-2010007-01	2010Q2	H.14	Less than Adequate Change Evaluation to the Facility as Described in the Final Safety Analysis Report Update
05000275/FIN-2010201-03	2010Q3	P.6	Security
05000275/FIN-2010201-02	2010Q3	H.12	Security
05000275/FIN-2010004-05	2010Q3		Inadequate Design Control for the Auxiliary Saltwater System
05000275/FIN-2010004-04	2010Q3	P.2	Inadequate Operability Determination
05000275/FIN-2010004-03	2010Q3	H.8	Inadequate Risk Assessment during Planned Maintenance Activities
05000275/FIN-2010004-02	2010Q3	P.3	Inadequate Risk Management during a Planned Auxiliary Saltwater Pump Outage
05000275/FIN-2010004-01	2010Q3	P.1	Failure to Identify a Degraded Fire Barrier
05000275/FIN-2010201-07	2010Q3		Security
05000275/FIN-2010201-06	2010Q3		Security
05000275/FIN-2010201-05	2010Q3		Security
05000275/FIN-2010403-02	2010Q3		Security
05000275/FIN-2010403-01	2010Q3	P.1	Security
05000275/FIN-2010201-04	2010Q3		Security
05000275/FIN-2010006-05	2010Q3	P.2	Failure to Appropriately Evaluate Failed Residual Heat Removal Surveillance Test
05000275/FIN-2010201-01	2010Q3	H.14	Security
05000275/FIN-2010006-04	2010Q3	H.14	Untimely and Inadequate Corrective Actions for the Emergency Diesel Generators
05000275/FIN-2010006-02	2010Q3	H.14	Failure to Maintain Proficiency of Operators to Meet the Time Critical Operator Actions
05000275/FIN-2010006-01	2010Q3	H.14	Inadequate Design Control for the Emergency Diesel Generator
05000275/FIN-2010006-03	2010Q3	P.2	Failure to Submit Complete and Accurate Information for a Requested License Amendment

Self-Identified List (Diablo Canyon)

	Q	Title
05000275/FIN-2009403-01	2009Q4	Licensee-Identified Violation
05000275/FIN-2009005-06	2009Q4	Licensee-Identified Violation
05000275/FIN-2010002-06	2010Q1	Licensee-Identified Violation
05000275/FIN-2010007-11	2010Q2	Licensee-Identified Violation
05000275/FIN-2010003-04	2010Q2	Licensee-Identified Violation

[Diablo Canyon Findings full list]

05000275/FIN-2010004-05

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