05000219/FIN-2016001-01

Finding

Title

Failure to Identify a Slower than Normal Scram Time of a Control Rod Drive

Description

The inspectors identified an NCV of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, because Exelon did not promptly identify and correct a condition adverse to quality. Specifically, Exelon did not identify that the scram time test result for control rod drive 18-47 was beyond the analyzed scram time, which resulted in a degraded control rod drive. Exelon entered this issue into their corrective action program. Immediate corrective actions included fully inserting the control rod drive and developing a casual analysis to determine the degraded condition. The performance deficiency is more than minor because it is associated with the configuration 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 performance deficiency affected the reliability of control rod drive 18-47 to perform its safety function due to a slower than normal scram time. The inspectors evaluated the finding using IMC 0609, Attachment 4, Initial Screening and Characterization of Findings. The inspectors determined that this finding is a deficiency that affected the design or qualification of a mitigating structure, system, or component (SSC), when the SSC maintained its operability or functionality. Therefore, the inspectors determined the finding to be of very low safety significance (Green). The finding has a cross-cutting aspect in the area of Problem Identification and Resolution, Identification, because Exelon did not identify issues completely, accurately, and in a timely manner in accordance with the program. Specifically, Exelon did not identify that the actual scram time of control rod drive 18-47 was beyond the analyzed scram time, resulting in a degraded control rod drive.

01
Site:	Oyster Creek
Report	IR 05000219/2016001 Section 1R15
Date counted	Mar 31, 2016 (2016Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	NRC identified
Inspection Procedure:	IP 71111.15
Inspectors (proximate)	A Patel B Dionne D Orr E Andrews E Dipaolo F Arner J Furia M Henrion N Floyd P Kaufman S Kennedy W Cook
Violation of:	10 CFR 50 Appendix B Criterion XVI
CCA	P.1, Identification
INPO aspect	PI.1
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Finding - Oyster Creek - IR 05000219/2016001

1(4)2(1)3(0)4(1)6(0)7(0)8(0)9(0)10(0)11(0)301(0)403(0)404(0)

IR 05000219/2016001: 1 2 3 4

Finding List (Oyster Creek) @ 2016Q1

CCA Matrix: 2016Q1

	Q	CCA	Title
05000219/FIN-2015003-01	2015Q3		Non-Conservative Temperature Input in the Electromatic Relief Valve Voltage Drop Calculation
05000219/FIN-2015004-01	2015Q4	P.2	Preconditioning of the Standby Liquid Control Relief Valves
05000219/FIN-2015004-02	2015Q4		Inadequate Problem Identification and Resolution Leading to Degradation of EPR Causing a Reactor Scram
05000219/FIN-2016001-01	2016Q1	P.1	Failure to Identify a Slower than Normal Scram Time of a Control Rod Drive
05000219/FIN-2016001-02	2016Q1	H.8	Failure to Use Respiratory Protection as Required in RWP/ALARA Plan for Drywell Head Reassembly
05000219/FIN-2016001-03	2016Q1		Inadequate Instructions for the Flexible Coupling Hose Preventative Maintenance Resulting in an Inoperable Emergency Diesel Generator

Self-Identified List (Oyster Creek)

	Q	Title
05000219/FIN-2016001-04	2016Q1	Licensee-Identified Violation

[Oyster Creek Findings full list]

05000219/FIN-2016001-01

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