International Equipment
Reliability Index (I-ERI)
Subcommittee Update
International ERWG Subcommittee
April 2015
1
 James Purss (EDF-Energy UK) Chair
 Ted Broadbent - (EDF-Energy UK) Acting Chair / Lead
I-ERI
Subcommittee
Team
 Patrick Ryckaert (Electrabel - Belgium)
 Miroslav Zelenay (ENEL – Slovakia)
 Fernando Mirallas (ANAV (Vandellos)
 Lubos Cvrcek (CEZ – Czech Republic)
 Sheng Zhang (CGN (Suzhou Nuclear Power Research Institute)
 Mark White (INPO – USA)
2
I-ERI
Subcommittee
 Reviewed the US ERI Revision 10 (including previous and proposed
future revisions)
 Discussed as a diverse group, which sub-indicators would be of
value for the IERWG to use as an indicator
 Put them in Four Categories –
Status @ Oct
14




Accept as is (Green)
Accept with minor differences (White)
Accept with major differences and further review (Yellow)
Remove completely (Red)
3
ERI Sub-Indicators
No.
Forced Loss Rate (INPO Definition – 18/24 month Running
Average)
Unplanned Power Reductions per 7000 hrs Critical (NRC
Indicator)
Quarterly Forced Loss Events
1.1
Unplanned Shutdown LCO Entries (in Last 3 months)
US ERI
Revision 10
Sub-indicator
Review
Operator Work Arounds
Consequential Failure Events (No. Events in Last 3
months)
Mitigating System Failure Margin (MSPI)
1.2
1.3
Data
Type
Lagging
Lagging
Lagging
Notes
Use WANO Definition of Forced Loss Rate
(will include 12 month Fueling Cycles)
Remove – This is a US NRC performance
indicator
Keep as is
2.2
Lagging
Only include ≤ 72 LCO entries caused by
equipment failures (prev and future ERI rev)
Keep as is
2.3
Lagging
Keep as is
Lagging
2.1
Lagging
System Health Improvement Effectiveness
3.2
Leading
Use old ERI revision – WANO safety system
unavailability indicators
Review what is best for the IERWG
Corrective Critical Work Backlog (Non-Outage)
4.1
Leading
Combine with Deficient, include Outage work?
Deficient Critical Work Backlog (Non-Outage)
4.2
Leading
Combine with corrective, include Outage?
Deferral of Critical PM’s (Outage and Non-Outage)
4.3
Leading
Keep as is
Timely Completion of PM’s (1st Half of Grace)
4.4
Leading
Keep as is
Leading
Leading
Critical Only - combine with schedule
completion
Critical Only - combine with scope survival
6.1
Leading
Review what is best for the IERWG
Age of Red & Yellow Systems
6.2
Leading
Older than a cycle (allow 12 month cycles)
Chemistry Effectiveness
7.1
Leading
Use WANO Chemistry Indicator
PM Change Backlog (AP-913 Critical and Non-Critical > 60
Days)
8.1
Leading
Use old ERI revision of % of PM Feedback
Work Week Scope Survival (Average of Last 3 months)
Work Week Schedule Completion (Average of Last 3
months)
Long Range Plan Implementation Effectiveness
3.1
5.1
5.2
4
 Share with full IERWG group, subcommittee suggestions and
receive feedback
Path Forward
Agreed @ Oct 14
 Create a IERWG guidance document for IERWG approval in April
Meeting
 Pilot the I-ERI to determine were the point thresholds should be to
adequately measure, compare performance, and drive equipment
reliability improvements
5
 Creation of a draft I-ERI guidance document complete
 Sharing of guidance document with sub-committee members for
review and approval
Progress since
Oct 14 meeting
 Items not completed
 Resolution of all sub-measures for inclusion within I-ERI hence
document is not ready for approval
 Point thresholds have not been adequately trialed to measure,
compare performance, and drive equipment reliability
improvements
 Adopt phased approach to producing an approved I-ERI measure
over the next 12 month period
 Phase 1 – focus on established and agreed sub-measures
Proposed
forward path






Forced Loss Rate (WANO definition)
Unplanned Automatic Scrams per 7,000 Hours Critical (WANO UA7)
Unplanned Shutdown LCO Entries ≤ 72 hours (in last 3 months)
Safety System Unavailability (WANO indicator)
Work Week Critical Scope Survival and Completion
Chemistry Performance (WANO CPI)
 Phase 2 – focus on sub-measures with minor changes required
 Phase 3 – completion of sub-measures with major differences with
potential incorporation of INPO ERI revision 11 successes – such as
Unmitigated SPVs or Maintenance Rework Index.
Phase 3
Full Deployment
Proposed
action timeline
Phase 2 results
published
Mid-2016
Phase 1 results
published
January 2016
Sept 15 I-ERWG
Presentation and
approval of phase
one analysis
(ERI submeasures 1.1,
1.2, 2.1, 3.1, 5.1,
7.1)
33 / 100 points
(1.3, 2.2, 2.3, 3.2,
4.3, 4.4, 4.5, 6.2)
Apr 16 I-ERWG
Presentation and
approval of phase
two analysis
+ 45 points
=
78 / 100 points
December 2016
Sept 16 I-ERWG
(4.1, 4.2, 5.2, 6.1)
Presentation and
approval of phase
three analysis
+ 22 points
=
100 / 100 points
Questions?
9