05000382/FIN-2011007-05

Finding

Title

Failure to Establish an Analysis to Support the Adequacy of the Four Inch Bulkhead Drain to Protect the Ultimate Heat Sink During Flood Events

Description

The team identified a Green noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, which states, in part, that measures shall be established to assure that applicable regulatory requirements and the design bases are correctly translated into specifications, drawings, procedures, and instructions. The design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculational methods, or by the performance of a suitable testing program. Specifically, prior to October 7, 2011, the licensee failed to establish and maintain an analysis supporting the adequacy of a single four-inch overflow (bulkhead) drain for protecting the ultimate heat sink motor control center from flooding during a design basis probable maximum precipitation event. Failure of the motor control center as a result of flooding from the probable maximum precipitation event could result in the loss of the associated ultimate heat sink, because the motor control center serves both the dry cooling tower and wet cooling tower fan motors. This finding was entered into the licensees corrective action program as Condition Report CR-WF3-2011-06701. The team determined that the failure to establish and maintain an analysis supporting the adequacy of a single four-inch overflow (bulkhead) drain for protecting the ultimate heat sink motor control center from flooding during a design basis probable maximum precipitation event was a performance deficiency. This finding was more than minor because it was associated with the design control attribute of the Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the design basis analysis for the four-inch bulkhead drain did not ensure that the motor control center would be adequately protected during a probable maximum precipitation event. In accordance with NRC Inspection Manual Chapter 0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings, the issue was determined to have very low safety significance (Green) because it was a design or qualification deficiency confirmed not to result in loss of operability or functionality. Specifically, the licensee performed calculations to justify the adequacy of the installed bulkhead drain for the probable maximum precipitation event. This finding did not have a crosscutting aspect because the most significant contributor did not reflect current licensee performance

05
Site:	Waterford
Report	IR 05000382/2011007 Section 1R21
Date counted	Dec 31, 2011 (2011Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.21
Inspectors (proximate)	C Smith T Farnholtz W Sifre J Leivo E Uribe N Hernandez
INPO aspect
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v • d • e

Finding - Waterford - IR 05000382/2011007

9(3)1(0)2(2)3(7)4(8)5(6)6(0)7(8)8(0)9(1)301(1)402(1)403(1)404(0)405(0)501(0)

IR 05000382/2011007: 1 2 3 4 5 6 7 8

Finding List (Waterford) @ 2011Q4

CCA Matrix: 2011Q4

	Q	CCA	Title
05000382/FIN-2011002-01	2011Q1	P.2	Failure to follow Operability Determination Process for a Degraded and Non-Conforming condition Related to Reactor Coolant Pump N9000 Seals
05000382/FIN-2011002-02	2011Q1	H.5	Control Room Envelope Preconditioning
05000382/FIN-2011003-02	2011Q2	P.2	Failure to Update the FSAR following Modifications to the Reactor Coolant Pump Vapor Seals
05000382/FIN-2011003-05	2011Q2		Loss of Reactor Coolant Inventory during the Assembly of Incore Instrumentation Flanges
05000382/FIN-2011402-01	2011Q2		Security
05000382/FIN-2011301-01	2011Q2		None
05000382/FIN-2011003-04	2011Q2	H.12	Failure to Implement Work Order Instructions to Restore a Feedwater Heater Drain Valve
05000382/FIN-2011003-01	2011Q2	P.5	Failure to Evaluate and Adequately Monitor Activities Associated with the Internal Conditions of the Condensate and Refueling Water Storage Pool Structures
05000382/FIN-2011003-03	2011Q2	H.12	Failure to Implement Written Procedures for Restoring a Time Delay Relay Associated with the A Output Breaker
05000382/FIN-2011009-01	2011Q3	P.5	Failure To Use Effective Engineering Controls As Part Of PreJob Planning To Reduce Contamination and Subsequent Exposure
05000382/FIN-2011004-08	2011Q3	H.8	Failure to Submit a LER within 60 days after Discovery of an Event
05000382/FIN-2011004-07	2011Q3	H.6	Failure to Follow Apparent Cause Evaluation Process Procedure
05000382/FIN-2011004-06	2011Q3	H.6	Untimely Actions to Correct Repetitive Dry Cooling Tower Fan Failures
05000382/FIN-2011004-04	2011Q3	P.2	Failure to Promptly Identified and Correct Work Order Instructions used for Technical Specification Surveillance Requirements
05000382/FIN-2011004-01	2011Q3	P.5	Failure to Evaluate and Adequately Perform Preventive Maintenance Activities Associated with Dry Cooling Tower Process Analog Control Cards
05000382/FIN-2011004-02	2011Q3	H.5	Failure to Adequately Implement a Reactor Coolant System Drain Down Procedure
05000382/FIN-2011004-03	2011Q3		Failure to Provide Adequate Testing for a Shutdown Cooling Heat Exchanger Outlet Stop Check Valve
05000382/FIN-2011004-05	2011Q3	H.13	Failure to Comply with Technical Specifications Surveillance Requirement 4.0.3 and the Limiting Conditions for Operation for Technical Specifications 3.0.3
05000382/FIN-2011005-01	2011Q4	H.14	Inoperable Train of Containment Cooling System
05000382/FIN-2011005-02	2011Q4	P.5	Failure to Identify and Correct a Condition Adverse to Quality Associated with the Main Feedwater Isolation Valves
05000382/FIN-2011005-04	2011Q4	H.7	Failure to Translate Tornado Impact on the Ultimate Heat Sink During a Refueling Outage
05000382/FIN-2011005-05	2011Q4		Failure to Follow Work Order Instructions to Install a Swagelok Fitting on a Main Feedwater Isolation Valve Tube Connection
05000382/FIN-2011007-01	2011Q4		Failure to Assure Design Basis Input was Correctly Translated into Design Basis Calculations
05000382/FIN-2011007-02	2011Q4		Failure to Establish an Adequate Containment Spray Pump Design Basis Verification Surveillance Test
05000382/FIN-2011007-03	2011Q4		Failure to Provide an Adequate Basis for Extrapolation of Vendor Supplied Pump Net Positive Suction Head Values
05000382/FIN-2011007-04	2011Q4		Failure to Provide Adequate Preventive Maintenance Procedures for Aluminum/Copper Electrical Connections to the Ultimate Heat Sink Transformers
05000382/FIN-2011007-05	2011Q4		Failure to Establish an Analysis to Support the Adequacy of the Four Inch Bulkhead Drain to Protect the Ultimate Heat Sink During Flood Events
05000382/FIN-2011007-06	2011Q4		Failure to Establish an Analysis of the Effect of Reverse Rotation of Dry Cooling Tower Fan Motors Resulting from a Tornado Event
05000382/FIN-2011007-07	2011Q4	H.14	Failure to Provide an Adequate Basis for Temperature Limits of Auxiliary Component Cooling Water Pump Motor Bearings
05000382/FIN-2011007-08	2011Q4	P.6	Failure to Adequately Manage the Risk Involved with a Maintenance Window for the Turbine Driven Essential Feedwater Pump
05000382/FIN-2011005-03	2011Q4		Failure to Periodically Update the Updated Final Safety Analysis Report

Self-Identified List (Waterford)

	Q	Title
05000382/FIN-2011003-06	2011Q2	Licensee-Identified Violation
05000382/FIN-2011003-07	2011Q2	Licensee-Identified Violation
05000382/FIN-2011403-01	2011Q2	Licensee-Identified Violation
05000382/FIN-2011005-06	2011Q4	Licensee-Identified Violation

[Waterford Findings full list]

05000382/FIN-2011007-05

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