05000416/FIN-2015004-04

Finding

Title

Failure to Establish Adequate Maintenance Instructions to Perform Work Activities on the Division III Diesel Generator Overspeed Trip Limit Switch

Description

The inspectors reviewed a self-revealing non-cited violation of Technical Specification 5.4.1.a, for the failure to establish adequate maintenance instructions to perform work activities on the division III diesel generator overspeed trip limit switch. Specifically, work orders did not contain adequate instructions to check the overspeed trip switches alignment in accordance with vendor recommendations. As a result, the division III diesel generator was rendered inoperable and unavailable. On July 15, 2015, the licensee appropriately set the limit switch to overspeed actuating arm engagement, and returned the diesel generator to operable. The licensee entered this issue into their corrective action program as Condition Report CR-GGN-2015-3985. The failure to establish adequate work instructions to verify the overspeed switch was properly set and adjusted was a performance deficiency. This performance deficiency is more than minor, and therefore a finding, because it is associated with the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, work orders to check the overspeed trip switches alignment did not contain adequate instructions to successfully perform the maintenance. The division III diesel generator was declared inoperable when the diesel spuriously tripped during the monthly surveillance run on July 13, 2015. The inspectors performed the initial significance determination for the division III emergency diesel generator failure. The inspectors used the NRC Inspection Manual 0609, Appendix A, Exhibit 2, Mitigating Systems Screening Questions. The finding required a detailed risk evaluation because it involved a performance deficiency that represented a loss of the high pressure core spray system following a postulated loss of offsite power because of the failure of the division III diesel generator. The Region IV senior reactor analyst performed a detailed risk evaluation in accordance with NRC Inspection Manual 0609, Appendix A, Section 6.0, Detailed Risk Evaluation. The detailed risk evaluation result is a finding of very low safety significance (Green). The calculated change in core damage frequency of 5.0 x 10-7 was dominated by an unrecovered station blackout beyond battery depletion. The analyst determined that the bounding risk of a large, early release of radiation was 9.6 x 10 . For the details of the analysis, see Attachment 3. Work orders were developed to address operating experience provided from the diesel generator vendor to the industry in December 2011. The inspectors determined that the cause of the deficiency occurred in 2011, and therefore, determined the finding did not have a cross-cutting aspect since it is not indicative of current licensee performance.

04
Site:	Grand Gulf
Report	IR 05000416/2015004 Section 1R19
Date counted	Dec 31, 2015 (2015Q4)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Self-revealing
Inspection Procedure:	IP 71111.19
Inspectors (proximate)	D Loveless E Simpson G Guerra G Pick G Warnick H Freeman J Buchanan M Phalen M Young N Day N Greene
Violation of:	Technical Specification Technical Specification - Procedures
INPO aspect
'
v • d • e

Finding - Grand Gulf - IR 05000416/2015004

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 05000416/2015004: 1 2 3 4 5 6

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-2015004-04

Navigation menu

Search