05000416/FIN-2015007-09

Finding

Title

Failure to Obtain a License Amendment for Use of Probabilistic Methods to Evaluate Tornado Missile Hazards

Description

The team identified a Green, Severity Level IV non-cited violation of 10 CFR 50.59, Changes, Tests, and Experiments, paragraph c(2), (1995 version) which requires that a licensee who desires to make a change in the facility described in the final safety analysis report, which involve an unreviewed safety question shall submit an application for amendment of the license pursuant to 10 CFR 50.90. Specifically, on August 31, 1995, the licensees incorporation of the use of probabilistic methods for evaluation of tornado missiles into the Grand Gulf Final Safety Analysis Report Section 3.5.2.5 involved an unreviewed safety question because it increased the probability of occurrence of a malfunction of equipment important to safety previously evaluated in the safety analysis report. In response to the issue, the licensee prepared a license amendment request to obtain approval to use probabilistic methods for tornado missile evaluations. This finding was entered into the corrective action program as Condition Reports CR-GGN-2015-04615 and CR-GGN-2015-4760. The team determined that the failure to obtain a license amendment prior to implementing a proposed change to the tornado missile protection design requirements was a performance deficiency. This performance deficiency was determined to be more than minor, and therefore a finding, because there was a reasonable likelihood the change would require NRC review and approval. This finding was evaluated using traditional enforcement, because the violation may impact the ability for the NRC to perform its regulatory oversight function. In accordance with the NRC Enforcement Policy, the significance determination process was used to inform the significance of the failure to obtain a license amendment prior to implementing a proposed change to the main control room design requirements. Using Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, the inspectors determined the finding involves the total loss of a safety function, identified by the licensee through a probabilistic risk analysis, individual plant examination for external events, or similar analysis, that contributes to external event initiated core damage accident sequences. Therefore, detailed risk evaluation was necessary. The senior reactor analyst reviewed the Grand Gulf Individual Plant Examination for External Events because it was the best available information on missile damage to exposed safety-related equipment. The senior reactor analyst determined that the finding had very low safety significance (Green) because the probability of damage occurring to the exposed safety-related equipment was 7.7E-9/year, which is below the threshold for additional probabilistic risk evaluation. Since the violation was associated with a Green reactor oversight finding, the traditional enforcement violation was determined to be a Severity Level IV violation, consistent with paragraph 6.1.d(2) of the NRC Enforcement Policy. This finding did not have a crosscutting aspect because the most significant contributor did not reflect current licensee performance.

09
Site:	Grand Gulf
Report	IR 05000416/2015007 Section 1R21
Date counted	Dec 31, 2015 (2015Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.21
Inspectors (proximate)	D Loveless H Leake J Watkins L Brandt R Latta T Farnholtz W Sherbin J Mchugh
Violation of:	10 CFR 50.59 10 CFR 50.90
INPO aspect
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Finding - Grand Gulf - IR 05000416/2015007

1(6)2(5)3(1)4(6)5(0)6(0)7(11)8(4)201(6)301(1)402(0)403(0)404(3)405(4)406(1)501(0)

IR 05000416/2015007: 1 2 3 4 5 6 7 8 9 10 11

Finding List (Grand Gulf) @ 2015Q4

CCA Matrix: 2015Q4

	Q	CCA	Title
05000416/FIN-2015001-02	2015Q1	H.12	Failure to Follow a Procedure Resulting in the Unplanned Inoperability of the Reactor Core Isolation Cooling System
05000416/FIN-2015001-05	2015Q1	H.8	Failure to Establish, Implement, and Maintain Appropriate Changes to the Offsite Dose Calculation Manual For REMP Airborne Sampling
05000416/FIN-2015001-04	2015Q1	H.1	Failure to Properly Calibrate Main Steam Line Radiation Monitors and Containment/Drywall High Range Radiation Monitors
05000416/FIN-2015001-03	2015Q1	P.2	Emergency Action Level Scheme for Nonfunctional Seismic Monitor
05000416/FIN-2015201-06	2015Q1		Security
05000416/FIN-2015201-05	2015Q1		Security
05000416/FIN-2015201-04	2015Q1		Security
05000416/FIN-2015201-03	2015Q1		Security
05000416/FIN-2015201-02	2015Q1		Security
05000416/FIN-2015201-01	2015Q1		Security
05000416/FIN-2015001-01	2015Q1		Failure to Take Timely Corrective Actions Associated with Division 1 and 2 Standby Service Water Pump House Ventilation System Due to Degraded Relays
05000416/FIN-2015001-06	2015Q1		Failure to Adequately Establish Commercial-Grade Items as Basic Components
05000416/FIN-2015002-03	2015Q2		Failure to the Update the Final Safety Analysis Report after the Extended Power Uprate
05000416/FIN-2015002-04	2015Q2		Possible Loss of Communications Systems during Control Room Fire Scenarios
05000416/FIN-2015002-01	2015Q2	H.12	Failure to Have Appropriate Instructions Resulted in the Unplanned Unavailability of the Reactor Core Isolation Cooling System
05000416/FIN-2015002-02	2015Q2	H.12	Failure to Identify High Vibration on the Division 3 EDG Soak Back Oil Pump
05000416/FIN-2015405-01	2015Q3		Security
05000416/FIN-2015003-01	2015Q3		Failure to Have Appropriate Instructions for Preventative Maintenance on the Division II Diesel Generator Fuel Rack Control Lever
05000416/FIN-2015007-05	2015Q4		Failure to Maintain a Safety-Related Cable Tray Overfill Analysis Record
05000416/FIN-2015007-02	2015Q4	H.6	Failure to Ensure that Electrical Interrupting Devices are Rated for Available Fault Current Levels
05000416/FIN-2015004-03	2015Q4		Failure to Make a Required Eight-Hour Report for Loss of Safety Function
05000416/FIN-2015007-07	2015Q4		Failure to Update the Final Safety Analysis Report
05000416/FIN-2015008-03	2015Q4	H.12	Failure to Declare Secondary Containment Inoperable Based on Failed Surveillance Testing
05000416/FIN-2015404-03	2015Q4		Security
05000416/FIN-2015404-02	2015Q4		Security
05000416/FIN-2015404-01	2015Q4		Security
05000416/FIN-2015007-08	2015Q4		Incomplete and Inaccurate Response to NRC Bulletin 88-04
05000416/FIN-2015008-04	2015Q4		Failure to Make Required Event Notification
05000416/FIN-2015007-03	2015Q4	S.4(o)	Lack of Coordination of Division III HPCS Switchgear 127N Undervoltage Relays
05000416/FIN-2015007-01	2015Q4		Failure to Ensure Safety-Related Alternating Current and Direct Current Equipment Operability and Functionality at Maximum Allowable Voltage Levels
05000416/FIN-2015008-01	2015Q4	P.1	Failure to Enter a Condition Adverse to Quality into the Corrective Action Program
05000416/FIN-2015007-04	2015Q4	H.8	Failure to Identify and Address Impacts of Revised Calculation Output Data
05000416/FIN-2015007-06	2015Q4		Failure to Perform Surveillance Requirement 3.8.1.9
05000416/FIN-2015007-09	2015Q4		Failure to Obtain a License Amendment for Use of Probabilistic Methods to Evaluate Tornado Missile Hazards
05000416/FIN-2015007-10	2015Q4	P.6	Failure to Ensure Equipment Operability and Functionality of Allowable Alternating Current Frequency Range
05000416/FIN-2015007-11	2015Q4	H.12	Failure to Implement Equipment Control Procedures for Loose Items in Containment
05000416/FIN-2015004-04	2015Q4		Failure to Establish Adequate Maintenance Instructions to Perform Work Activities on the Division III Diesel Generator Overspeed Trip Limit Switch
05000416/FIN-2015004-02	2015Q4	H.14	Failure to Timely Enter Technical Specification Surveillance Requirement 3.0.1
05000416/FIN-2015004-01	2015Q4	H.6	Failure to Have Appropriate Instructions for Preventative Maintenance on the Division I Diesel Generator Simulated Run
05000416/FIN-2015301-01	2015Q4	H.8	Inadequate Plant Operating Procedures with Eight Examples
05000416/FIN-2015008-02	2015Q4	P.1	Failure to Promptly Initiate Condition Reports

Self-Identified List (Grand Gulf)

	Q	Title
05000416/FIN-2015002-05	2015Q2	Licensee-Identified Violation
05000416/FIN-2015405-02	2015Q3	Licensee-Identified Violation
05000416/FIN-2015405-03	2015Q3	Licensee-Identified Violation
05000416/FIN-2015405-04	2015Q3	Licensee-Identified Violation
05000416/FIN-2015406-01	2015Q3	Security
05000416/FIN-2015004-05	2015Q4	Licensee-Identified Violation
05000416/FIN-2015004-06	2015Q4	Licensee-Identified Violation

[Grand Gulf Findings full list]

05000416/FIN-2015007-09

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