05000289/FIN-2012007-05: Difference between revisions

Finding

Title

LICENSEE-IDENTIFIED Violation

Description

10 CFR Part 50, Appendix B, Criterion lll, Design Control, requires in part, that design control measures provide for verifying or checking the adequacy of design, Contrary to this, design control measures had not ensured and verified that connected Class 1E loads are not damaged or become unavailable for a design basis event concurrent with a degraded voltage condition between the 4kV degraded voltage dropout setting and the loss-of-voltage setting, prior to and following transfer to the EDG onsite source. Exelon had previously identified in early 2009, within AR 838100838100 that actions were required to review their design at TMI with respect to the selection and sizing of TOLs which were not bypassed on an accident signal. This included proposed actions to review the long time trip of protective relays and the impact of extended duration of locked rotor current on potential motor damage from additional heating. Additionally, Exelon identified in December 2011 within AR 1276061, the need to review the design to verify the allowable degraded voltage relay (DVR) time duration would not result in failure of safety-related systems or components. The finding was of very low safety significance (Green) because the finding did not represent the loss of a system salety function, an actual loss of safety function of a single train for greater than the TS allowed outage time, or screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. Exelon initiated AR 1347885 to ensure all aspects of the design issue will be resolved based on additional comments from the inspection team.

05
Site:	Three Mile Island
Report	IR 05000289/2012007 Section 4OA7
Date counted	Mar 31, 2012 (2012Q1)
Type:	NCV: Green
cornerstone	Mitigating Systems
Identified by:	Licensee-identified
Inspection Procedure:
Inspectors (proximate)	J Lilliendahl J Schoppy F Arner J Brand J Nicely L Doerflein C Edwards
INPO aspect
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v • d • e

Finding - Three Mile Island - IR 05000289/2012007

12(1)12(0)12(1)12(1)12(0)1(0)2(5)3(0)4(2)5(3)6(0)7(5)8(1)12(1)201(0)301(0)403(2)501(0)9(0)12(1)12(1)12(1)12(1)

IR 05000289/2012007: 1 2 3 4 5

Finding List (Three Mile Island) @ 2012Q1

CCA Matrix: 2012Q1

	Q	CCA	Title
05000289/FIN-2011010-01	2011Q3		Security
05000289/FIN-2011503-01	2011Q3		(Traditional Enforcement) Changes to EAL Basis Decreased the Effectiveness of the Plan without Prior NRC Approval
05000289/FIN-2011503-02	2011Q3		Changes to EAL Basis Decreased the Effectiveness of the Plan without Prior NRC Approval
05000289/FIN-2011005-02	2011Q4	H.5	Inadequate Control of Reactor Coolant Let-down And Clean-up to Minimize Outage Occupationa Radiation Dose
05000289/FIN-2011005-05	2011Q4	P.1	Failure to ldentify a Non-Conservative Technical Specification following Revision to River Stage Discharge Analysis
05000289/FIN-2011005-03	2011Q4		Adequacy of Seismic Gap Flood Seal
05000289/FIN-2011005-04	2011Q4		Adequacy of Flood Protection without Consideration of Wind Generated Wave Activity
05000289/FIN-2011005-01	2011Q4		Inspect and Disposition Leakage Event from BRCP Flange from 1R19
05000289/FIN-2012002-01	2012Q1	H.7	Failure to Implement Fire Protection Compensatory Actions for Out-of-Service Appendix R Heat Exchanger
05000289/FIN-2012002-02	2012Q1	H.2	Inadequate Inspection of RCP Flanges
05000289/FIN-2012002-03	2012Q1	P.2	Inadequate System Monitoring Results in Multiple IA-P-4 Trips
05000289/FIN-2012002-04	2012Q1	H.5	Failure to Perform an Adequate Maintenance Risk Evaluation for DH-V-3 Planned Maintenance
05000289/FIN-2012007-01	2012Q1		Nonconservative Differential Pressure Value used in DHRyLPI Motor Operated Valves Design Analysis
05000289/FIN-2012007-02	2012Q1		Inadequate TOL Sizing Evaluation for Jogging/Throttling Valves
05000289/FIN-2012007-03	2012Q1	H.7	lnadequate Design Control for Battery Sizing Calculation
05000289/FIN-2012007-04	2012Q1		Inadequate Design and Maintenance of SBO Diesel Generator Battery

Self-Identified List (Three Mile Island)

	Q	Title
05000289/FIN-2012002-05	2012Q1	Licensee-Identified Violation
05000289/FIN-2012007-05	2012Q1	Licensee-Identified Violation

[Three Mile Island Findings full list]

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 {{finding
-| title = Licensee-Identified Violation
+| title = LICENSEE-IDENTIFIED Violation
 | docket = 05000289
 | inspection report = IR 05000289/2012007

05000289/FIN-2012007-05: Difference between revisions

Revision as of 22:16, 29 May 2018

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05000289/FIN-2012007-05: Difference between revisions

Revision as of 22:16, 29 May 2018

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