05000416/FIN-2008003-03: Difference between revisions

Finding

Title

Ineffective Corrective Actions in Response to Plant Transients Resulting from Animal Intrusions

Description

The inspectors reviewed a self-revealing Green finding involving ineffective corrective actions that resulted in an unplanned down power caused by an animal intrusion. The plant experienced a loss of the balance of plant Transformer 23 with a loss of power to the plant service water pumps. Operators reduced reactor power to 47 percent. The control room dispatched operators to the river via a boat due to high river level and discovered a dead raccoon in the vicinity of the transformer. The inspectors noted that two previous reactor scrams had been caused by raccoons, and an injured raccoon had previously been found at the base of Transformer 23. The inspectors concluded that the flooding conditions which have been routinely experienced at the site and the occurrence of raccoon events at the site could have been used to anticipate and mitigate the unplanned down power. The licensee entered this issue into their corrective action program as Condition Report CR-GGN-2008-02089. The finding was more than minor because it was associated with the initiating events cornerstone attribute of equipment performance and affected the associated cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during power operations. Using the Inspection Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheet, the inspectors concluded that a Phase 2 evaluation was required because the finding impacted both the Initiating Event and Mitigating Systems Cornerstone. The inspectors performed a Phase 2 analysis using Appendix A Determining the Significance of Reactor Inspection Findings for At-Power Situations, of Manual Chapter 0609, Significance Determination Process, and the Phase 2 Worksheets for Grand Gulf Nuclear Station. The inspectors determined there was an increase in likelihood of a transient without the power conversion system but there was no reduction in remaining capability. Because the exposure time of the finding was less than 30 days, the result of the Phase 2 analysis was that the finding had very low safety significance (Green). The cause of this finding has a crosscutting aspect in the area of problem identification and resolution associated with operating experience in that the licensee failed to implement proper corrective actions to prevent animals from causing a plant transient P.2(b)

03
Site:	Grand Gulf
Report	IR 05000416/2008003 Section 4OA3
Date counted	Jun 30, 2008 (2008Q2)
Type:	Finding: Green
cornerstone	Initiating Events
Identified by:	Self-revealing
Inspection Procedure:	IP 71153
Inspectors (proximate)	N O'Keefe P Elkmann R Smith A Barrett D Bollock G Guerra I Anchondo
CCA	P.5, Operating Experience
INPO aspect	CL.1
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Finding - Grand Gulf - IR 05000416/2008003

1(0)2(11)3(5)4(3)5(10)6(4)7(0)8(0)9(0)301(0)401(0)402(1)404(1)16(0)

IR 05000416/2008003: 1 2 3 4 5

Finding List (Grand Gulf) @ 2008Q2

CCA Matrix: 2008Q2

	Q	CCA	Title
05000416/FIN-2007008-02	2007Q4		Verify Continued Operability of RHR Heat Exchanger B Due to Fouling
05000416/FIN-2008002-02	2008Q1	H.11 H.12	Failure to Properly Implement a Compensatory Fire Watch Protection Procedures
05000416/FIN-2008002-01	2008Q1	P.1 P.1(a)	Failure to Perform an Adequate Inspection of Probable Maximum Precipation Door Seals Protecting SAFETY-RELATED Equipment
05000416/FIN-2008002-05	2008Q1	H.8	Failure to Evaluate Cracks in Standby Service Water Pump House Structure
05000416/FIN-2008002-06	2008Q1		Ineffective Corrective Actions in Response to Resin in the Electrohydraulic Control System
05000416/FIN-2008002-03	2008Q1		Failure of Licensed Senior Reactor Operators to Maintain the Proficiency to Maintain Their License Current
05000416/FIN-2008002-04	2008Q1	H.7	Failure to Perform a Required Technical Speicification
05000416/FIN-2008002-07	2008Q1		Inadequate Design Control of HPCS Minimum Flow Valve MOTOR-OPERATED Valve Over Current Setpoint
05000416/FIN-2008003-01	2008Q2		Inadequate Fireproofing on Fire Barrier Protecting the Safeguards Switchgear Room
05000416/FIN-2008003-02	2008Q2	H.11 H.12	Failure to Recognize the Division Iii Diesel Generator Being NON-FUNCTIONAL
05000416/FIN-2008003-03	2008Q2	P.5 P.2(b)	Ineffective Corrective Actions in Response to Plant Transients Resulting from Animal Intrusions
05000416/FIN-2008003-04	2008Q2	H.13	Failure to Follow Procedures Causing a Loss of Decay Heat Removal to the Spent Fuel Pool

Self-Identified List (Grand Gulf)

	Q	Title
05000416/FIN-2008002-08	2008Q1	Licensee-Identified Violation
05000416/FIN-2008002-09	2008Q1	Licensee-Identified Violation
05000416/FIN-2008002-10	2008Q1	Licensee-Identified Violation
05000416/FIN-2008003-05	2008Q2	Licensee-Identified Violation

[Grand Gulf Findings full list]

@@ Line 1: / Line 1: @@
 {{finding
-| title = Ineffective Corrective Actions In Response To Plant Transients Resulting From Animal Intrusions
+| title = Ineffective Corrective Actions in Response to Plant Transients Resulting from Animal Intrusions
 | docket = 05000416
 | inspection report = IR 05000416/2008003
@@ Line 13: / Line 12: @@
 | identified by = Self-Revealing
 | Inspection procedure = IP 71153
-| Inspector = N O,'Keefe P, Elkmann R, Smith A, Barrett D, Bollock G, Guerra I, Anchond
+| Inspector = N O'Keefe, P Elkmann, R Smith, A Barrett, D Bollock, G Guerra, I Anchondo
 | CCA = P.5
 | INPO aspect = CL.1

05000416/FIN-2008003-03: Difference between revisions

Latest revision as of 22:05, 29 May 2018

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05000416/FIN-2008003-03: Difference between revisions

Latest revision as of 22:05, 29 May 2018

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