05000298/FIN-2012002-01

Finding

Title

Failure to Maintain Design Control for Internal Flooding

Description

The inspectors identified a non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, associated with the licensees failure to assure that the applicable design basis requirements associated with the stations internal flooding analysis in response to a feed water line break was correctly translated into the plant design. Specifically, the licensee used incorrect assumptions when modeling critical channel widths for water flow on the 903 feet elevation of the reactor building which resulted in an inadequate calculation for ensuring that required safety related equipment would remain operable following a feed water line break event. This issue was entered into the licensees corrective action program as Condition Reports CR-CNS-2012-00451 and CR-CNS-2012-01218. The licensees failure to maintain design control with respect to the internal flooding analysis was a performance deficiency. The performance deficiency was determined to be more than minor because it was associated with the design control attribute of the Mitigating Systems Cornerstone, and affected the associated cornerstone objective to ensure availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences, and is therefore a finding. The inspectors evaluated the finding using IMC 0609.04 Phase 1 Initial Screening and Characterization of Findings. The inspectors determined that the finding is of very low safety significance (Green) because the finding: (1) was not a design or qualification issue confirmed not to result in a loss of operability or functionality; (2) did not represent an actual loss of safety function of system or train; (3) did not result in the loss of one or more trains of nontechnical specification equipment; (4) did not screen as potentially risk significant due to seismic, flooding, or severe weather initiating event. This finding had a cross-cutting aspect in the area of problem identification and resolution associated with the corrective action component, because the licensee failed to thoroughly evaluate problems such that the resolutions addressed causes. By failing in 2010,to identify and model critical channel widths for water flow into their flood analysis, the licensee did not have assurance that safety related equipment would remain operable following a feed water line break event

01
Site:	Cooper
Report	IR 05000298/2012002 Section 1R06
Date counted	Mar 31, 2012 (2012Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.06
Inspectors (proximate)	C Henderson J Josey J Laughlin S Garchow V Gaddy
CCA	P.2, Evaluation
INPO aspect	PI.2
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v • d • e

Finding - Cooper - IR 05000298/2012002

1(0)2(9)3(16)4(13)5(12)6(0)7(6)8(0)301(1)403(0)404(4)501(0)503(0)801(0)31(0)

IR 05000298/2012002: 1 2 3 4 5 6 7 8 1

Finding List (Cooper) @ 2012Q1

CCA Matrix: 2012Q1

	Q	CCA	Title
05000298/FIN-2011004-01	2011Q3	H.7	Failure to Place the Essential Service Water System Strainers in (a)(1)
05000298/FIN-2011004-02	2011Q3		Failure to Scope Reactor Building Drain Components and Steam Exclusion Doors that Affect Safety-related Systems in the Maintenance Rule Monitoring Program
05000298/FIN-2011004-03	2011Q3	H.8	Failure to Assess and Manage Risk for Maintenance Near Electrical Towers That Could Impact Initiating Events
05000298/FIN-2011004-04	2011Q3	P.3	Failure to Assess and Manage Risk for Maintenance Near an Operating Reactor Feed Pump That Could Impact Initiating Events
05000298/FIN-2011004-05	2011Q3	H.12	Failure to Follow Procedure Results in Personnel Contamination
05000298/FIN-2011004-06	2011Q3	P.2	Failure to Identify, Correct, and Prevent Recurrence of a Significant Condition Adverse to Quality
05000298/FIN-2011004-07	2011Q3		Inadequate Procedure Results in Inoperable Essential Pump
05000298/FIN-2011005-07	2011Q4	H.14	Failure to Perform Required 10 CFR 50.59 Evaluations for Changes
05000298/FIN-2011202-02	2011Q4		Security
05000298/FIN-2011005-06	2011Q4	P.2	Failure to Correctly Translate Design Requirements into Installed Plant Configuration
05000298/FIN-2011005-05	2011Q4	P.1	Failure to Identify Deficient Performance During a Single-Facility Drill
05000298/FIN-2011005-03	2011Q4	H.12	Failure to Follow Procedures for Dose Rate Alarms Received by Two Individuals
05000298/FIN-2011005-02	2011Q4	H.2	Failure to Maintain Control and Continuous Coverage of a Posted Locked High Radiation Area
05000298/FIN-2011005-01	2011Q4	H.2	Failure to Conspicuously Post a High Radiation Area
05000298/FIN-2011005-04	2011Q4		Failure to Provide Complete and Accurate Solid Radwaste Shipment Information in Annual Reports
05000298/FIN-2012002-01	2012Q1	P.2	Failure to Maintain Design Control for Internal Flooding
05000298/FIN-2012002-02	2012Q1	P.2	Failure to Scope Required Components in the Stations Maintenance Rule Monitoring Program
05000298/FIN-2012002-03	2012Q1	H.12	Failure to Appropriately Manage Risk for Maintenance in the Stations Switchyard
05000298/FIN-2012002-04	2012Q1		Failure to Maintain Design Control of Standby Liquid Control System
05000298/FIN-2012002-05	2012Q1	H.7	Unevaluated Pre-conditioning for Core Spray Motor-operated Valves prior to Conducting As Found In-service Surveillance Testing
05000298/FIN-2012002-06	2012Q1	H.14	Failure to Follow Radiation Work Permit Requirements
05000298/FIN-2012002-07	2012Q1		Failure to Furnish Evidence of an Activity Affecting Quality
05000298/FIN-2012002-08	2012Q1	H.2	Failure to Follow Station Procedure Results in Inadequate Work Instructions

Self-Identified List (Cooper)

	Q	Title
05000298/FIN-2011005-08	2011Q4	Licensee-Identified Violation
05000298/FIN-2011005-09	2011Q4	Licensee-Identified Violation

[Cooper Findings full list]

05000298/FIN-2012002-01

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