05000282/FIN-2012011-02

Finding

Title

Inadequate Procedure for Draining of Reactor Coolant System

Description

An inspector-identified finding of very low safety significance and a non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion V, was identified due to the licensees use of an inadequate procedure during draining of the RCS. The inspectors determined that the procedure used during the March 6, 2012, draining of the reactor coolant to the vessel flange level, did not contain adequate guidance for identifying and compensating for inadequate reactor vessel level indication due to over pressurization of the reactor vessel. This was a performance deficiency that required an evaluation using the SDP. This deficiency was more than minor as inaccurate RCS level indication resulted in plant operators declaring an NOUE and over-draining the RCS to the point where the function of the safety-related residual heat removal system was potentially affected. The licensee initiated Action Request (AR) 1329465 to evaluate this issue. This finding was determined to be crosscutting in the Resources area, because the licensee has not maintained compete, up-to-date procedures for performing RCS draining (H.2(c)). The licensee had prior instances where RCS level indication was lost due to vessel overpressure; however, the licensee decided not to revise the procedures based on an incorrect assumption that the procedures contained adequate guidance.

02
Site:	Prairie Island
Report	IR 05000282/2012011 Section 4OA5
Date counted	Sep 30, 2012 (2012Q3)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:
Inspectors (proximate)	N Shah K Riemer C Moore
CCA	H.7, Documentation
INPO aspect	WP.3
'
v • d • e

Finding - Prairie Island - IR 05000282/2012011

1(0)2(13)3(6)4(2)5(11)7(3)8(0)9(0)10(0)11(3)301(0)402(1)403(0)404(0)406(0)501(0)503(0)504(1)

IR 05000282/2012011: 1 2 3

Finding List (Prairie Island) @ 2012Q3

CCA Matrix: 2012Q3

	Q	CCA	Title
05000306/FIN-2011005-04	2011Q4	H.14	Failure to Complete Immediate Operability Determination on Molded Case Circuit Breakers
05000282/FIN-2011012-01	2011Q4		Flammable Gas Bottles Installed and/or Stored in the Auxiliary Building
05000282/FIN-2011012-02	2011Q4	H.13	Failure to Correct a Condition Adverse to Quality
05000306/FIN-2011005-01	2011Q4		Potential Technical Specification NON-COMPLIANCE While Completing Repairs on Motor Damper 32421
05000306/FIN-2011005-03	2011Q4		Potential Maintenance Rule Scoping Issue for Residual Heat Removal Pump Pit Sump Pumps and Level Switches
05000282/FIN-2011405-01	2011Q4	H.14	Security
05000306/FIN-2011005-05	2011Q4		Potential Safety System Functional Failure Due to Steam Exclusion Damper Issues
05000306/FIN-2011005-02	2011Q4		Appendix R Fire Barrier Degraded Between Fire Areas 118 and 128
05000282/FIN-2012002-02	2012Q1		Review Of Steam Exclusion Damper Maintenance Effectiveness
05000282/FIN-2012002-08	2012Q1		Unit 2 Manual Reactor Trip During Shutdown for Outage 2R27
05000282/FIN-2012002-11	2012Q1	H.12	Inadequate Operational Log Entries
05000282/FIN-2012002-10	2012Q1		Inadequate Three Hour Fire Barrier Between Bus 26 And Bus 27 Rooms
05000282/FIN-2012002-09	2012Q1		Review of Root Cause Evaluation for March 6, 2012, Notice of Unusual Event
05000282/FIN-2012002-07	2012Q1	P.3	Failure to Timely Activate ERDS
05000306/FIN-2012002-06	2012Q1	H.10	Failure to Timely Augment the On-Shift Staffing
05000282/FIN-2012002-05	2012Q1	H.2	Failure to Implement Procedure Use and Adherence Requirements While Draining Sodium Hypochlorite Draw Down Tank
05000282/FIN-2012002-04	2012Q1	H.14	Failure to Assess Operability of Circuit Breakers due to Inadequate Lubrication
05000282/FIN-2012002-03	2012Q1	H.13	Failure to Properly Assess Operability of D2 EDG following Surveillance Testing
05000282/FIN-2012002-01	2012Q1	H.5	Breaker 212E-44 Failure due to Lack of Preventive Maintenance
05000282/FIN-2012003-05	2012Q2		Impact of Outside Air Temperatures on D1 and D2 EDG Operability
05000282/FIN-2012003-04	2012Q2		Failure to Make a 60 Day Report Pursuant to 10 CFR 50.73
05000282/FIN-2012003-03	2012Q2		Failure to Make a 60 Day Report Pursuant to 10 CFR 50.73
05000306/FIN-2012003-02	2012Q2	H.5	Failure to Properly Assess and Manage Risk
05000282/FIN-2012003-01	2012Q2	P.2	Unit 2 Reactor Trip Due to Operation of LOW Pressure Turbine Outside ITS Design
05000282/FIN-2012007-03	2012Q3		Lack of Design Basis Information for Steam Exclusion Damper Leakage
05000282/FIN-2012011-03	2012Q3	H.7	Failure to Update the Calculations for Steam Generator Draining
05000282/FIN-2012004-02	2012Q3		Unit 1 Required Shutdown Due to D1 and D2 Emergency Diesel Generator Exhaust Fires
05000282/FIN-2012007-02	2012Q3		Failure to Perform Maintenance Rule Evaluations After Discovering Degraded Radiation Monitors
05000282/FIN-2012011-02	2012Q3	H.7	Inadequate Procedure for Draining of Reactor Coolant System
05000282/FIN-2012011-01	2012Q3	P.3	Failure to Take Corrective Action for Reactor Coolant System Level Indication Issues
05000282/FIN-2012004-01	2012Q3	H.2	Failure to Perform Adequate Past Operability Evaluations After Discovering Degraded Component Cooling Heat Exchangers
05000282/FIN-2012007-01	2012Q3		Number of Air Receivers Required to Be Greater than 480 PSIG to Support EDG Operability

Self-Identified List (Prairie Island)

	Q	Title
05000306/FIN-2011005-07	2011Q4	Licensee-Identified Violation
05000282/FIN-2011405-02	2011Q4	Security
05000306/FIN-2011005-06	2011Q4	Licensee-Identified Violation
05000306/FIN-2011005-08	2011Q4	Licensee-Identified Violation
05000306/FIN-2011005-09	2011Q4	Licensee-Identified Violation
05000282/FIN-2012002-13	2012Q1	Licensee-Identified Violation
05000282/FIN-2012002-12	2012Q1	Licensee-Identified Violation
05000282/FIN-2012003-06	2012Q2	Licensee-Identified Violation
05000282/FIN-2012402-01	2012Q3	Security

[Prairie Island Findings full list]

05000282/FIN-2012011-02

Navigation menu

Search