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- E WASHINGTON. D. C. 20$55 2 8 APR 1987
\\.....f MEMORANDUM FOR:
Karl Kniel, Chief Reactor and Plant Safety Issues Branch Civision of Reactor and Plant Systems, RES THRU:
Paul E. Norian, Section Leader Reactor and Plant Safety Issues Branch Division of Reactor and Plant Systems, RES FROM:
Aleck W. Serkiz, Senior Task Manager Reactor and Plant Safety Issues Branch Division of Reactor and Plant Systems, RES
SUBJECT:
MEETING
SUMMARY
(REF. SAFETY ISSUE B-56)
A meeting was held on April 22, 1987, to review the work plan for developing emergency diesel generator (EDG) reliability guidelines.
The attendees are shown in Table 1 and Enclosures 1 and 2 contain the material discussed.
Alan Rubin reviewed the status of the USI A-44 resolution and development of the 0.95 diesel availability target.
This meeting was primarily directed at ensuring an understanding of the desired end product.
The planned work assignments and schedule for completion are contained in Enclosure 1. provides more detail on the work scope and approach to developing EDG reliability guidelines.
The next meeting to review initial results is scheduled for June 3,1987; written material will be express mailed to participants by May 27, 1987.
A final draft of the EDG guidelines is scheduled for mid-July 1987.
I have contacted INP0 and EPRI staff who are active in this technical area to review the guidelines being developed and to provide this working group with feedback.
Those organizational details should be worked out in the next several weeks, along with a better identification of NRR and AE0D staff who will participate as NRC staff reviewers.
If you have further questions I will discuss this meeting with you in more
- detail, b.
Aleck W. Serkiz, Sen r Task Manager Reactor and Plant Safety Issues Branch Division of Reactor and Plant Systems, RES cc:
T. Speis B. Sheron W. Minners A. Rubin PDR 9306150181 930422 PDR PR 50 57FR14514 PDR 3C-(l' OM
Table 1 ATTENDEES April 22, 1987 Meeting B-56, Dieseal Reliability Name Company / Affiliation Business Phone John Boccio BNL (FTS)-666-7690 Emmett Murphy NRC/NRR/EMIB 492-7632 Rudy Karsch NRC/NRR/PSB 492-9418 Alan Rubin RES/RHFB 492-8303 Jon Young EI International (206)-854-0080' Joseph Fragola SAIC/NY (212)-679-3244 Arthur Payne Sandia (508)-846-3568 Ernie Lofgren SAIC (703)-821-4492 Jack Burns NRC/RES 443-7860 George J. Delarrche Trident
'(301)-267-8128 j
Gary M. DeMoss SAIC (703)-498-6485 i
i
DIESEL RELIABILITY PROGRAM GUIDELINES Kickoff Meeting April 22,1987 i
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R ELI ABILITY PROGRAM OBJECTIVE M AINTAIN ACCEPTABLY LOW LIKELIHOOD OF CORE MELT FREQUENCY THROUGHOUT PLANT LIFETIME Problom Dotoction 4o Prognostic e Diagnostic Problem 2
Problom Prioritization Closoout and j
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RELIABILITY PROGRAM PROCESS relia bility data Assess Comparo Monitor
k reliability rollability perf ormanco in dosion and to ta rgots pe rf orma nce o poratio ns of f ectiveness l
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y Assess problem Verify correctivo priority and schedulo problem action analysis ef f ectivonoso Y
importa nt corrective p roble m s action rea son corrective Imptomonted action problemo found Determine Id entif y implement corrective corrective problem action cause action
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DIESEL RELIABILITY PROGRAM TEMPLATE (TASK 1)
S OBJECTIVE
- DEFINE A TOP LEVEL TEMPLATE RELIABILITY PROGRAM FOR DIESELS S
APPROACH
- ADOPT GENERIC RELIABILITY PROGRAM TO DIESELS l
S PURPOSE OF TASK
- USEFUL TO NRC TO SUPPLEMENT REVIEW GUIDELINES
.- USEFUL TO INDUSTRY AS GUIDE TO IMPLEMENTING THEIR OWN RELIABILITY PROGRAM'S 1
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REVIEW DIESEL FAILURE CAUSE AND CORRECTIVE ACTION DATA (TASK 2) 9 OBJECTIVE
- INDICATE IMPORTANT (GENERIC) RELIABILITY PROBLEMS AND THEIR CORRECTIVE ACTIONS S
APPROACH DATA AND LITERATURE REVIEW G
PURPOSE OF TASK MAKE SURE TEMPLATE AND GUIDELINES COVER IMPORTANT PROBLEM TYPES AND ASSURE THEY WILL PROVIDE CORRECTIVE ACTIONS USE TO MAKE LISTS I
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DEVELOP DIESEL RELIABILITY PROGRAM GUIDELINES (TASK 3)
S OBJECTIVES
- PROVIDE GUIDELINES FOR NRC USE TO REVIEW INDUSTRY SUBMITTALS FOR DIESEL RELIABILITY PROGRAM'S O
APPROACH
- GUIDELINES BASED ON DIESEL RELIABILITY PROGRAM TEMPLATE t
9 PURPOSE OF TASK
- NRC USE FOR REVIEW OF DIESEL RELIABILITY PROGRAMS THAT ADDRESS GENERIC ISSUES A-44 AND B-56 t
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.iw.A_p4-me-E OO PEER REVIEW DIESEL RELIABILITY PROGRAM PRODUCTS (TASK 4) 9 OBJECTIVE
- PROVIDE A REVIEW OF PRODUCTS FROM PREVIOUS THREE TASKS 9
APPROACH
- PEER REVIEW TEAM S
PURPOSE OF TASK
- ASSURE TECHNICAL INTEGRITY
i l
TASK 1:
DEVELOP TEMPLATE DIESEL RELIABILITY PROGRAM l
The objective of this task is to define the reliability and management
- elements, activities and interactions that a diesel reliability program should possess to achieve a stated diesel availability goal.
l The general features and activities of a comprehensive reliability program with the potential for achieving a stated reliability goal were presented in Reference 1.
Reference 2 provides a description of a Reliabil-ity Centered Surveillance (RCS) concept that essentially provides much more detail for the " reliability problem detection" portion of a reliability program.
These two references, along with b.,e of engineering opinion from recognized diesel experts, will form the basis for establishing a diesel reliability program.
Top level elements necessary for a diesel reliability program will be defined. Ways of accomplishing these, and performance criteria for each
- element, will be defined.
One example of a criterion for performance of a reliability program element would be how quickly a diesel reliability moni-toring function should respond to a reliability problem of a given severity.
I Another example of a criterion on the performance of a reliability program element might be the techniques used to assure test adequacy, that is, that all important diesel failure modes were covered by the combination of sur-veillance schemes used for the diesels.
Results obtained from NRC projects, including the NRC-sponsored Risk Based Performance Indicator (RBPI) project, i
will be used as appropriate to develop these criteria.
l The products from this task include the top level specification of a
diesel reliability program; specification of techniques and options for j
accomplishing each element of the reliability program; a specification of the interactions among the various elements of the reliability program; and, to the extent possible, a specification of performance criteria that will suggest how well each program element must operate in order to achieve the stated diesel availability goal.
This information will be provided in the form of flow diagrams, work breakdown structures, and tables. A short task report will be issued describing the information.
1
TASK 2:
IDENTIFY DIESEL FAILURE MODES. CAUSES. AND CORRECTIVE ACTIONS The objective of this task is to characterize the modes and causes of standby EPS diesel failure, and identify options for corrective action.
This information will provide an important bottom-up input into a diesel reliability program that could result in generic engineering or operational changes for standby diesel generators in nuclear power plants.
This infor-mation should also provide an initial focus to reliability programs concern-ing where to place analysis and surveillance efforts.
Detailed diesel failure analyses have been conducted on the EPS of at least two nuclear power plants.
Diesel failure data is also contained in several NRC reports (References 3 through 7).
The failure information from j
the two plants will be analyzed, as well as relevant information from the i
above references, and any additional information that may be identified in meetings among the project team members.
The purpose of the data analysis is to characterize the modes and causes of diesel failure, to prioritize these by frequency of failure, and to identify options for corrective actions for the important types of failures.
This information will be used to guide establishment of diesel reliability programs, and to assure that the emphasis of the guidelines for reliability programs is appropriately placed.
The product from this task will be a table showing the important diesel and diesel subsystem failure modes; and for each of these, ' options for corrective action.
This table will be presented and discussed in a short task report.
TASK 3:
DEVELOP GUIDELINES FOR DIESEL RELIABILITY PROGRAMS l
Develop guidelines that can be used by the NRC to help evaluate the adequacy of industry initiated diesel reliability programs; and that can be l
used by the industry as a template for establishing diesel reliability programs.
From the work conducted in Tasks 1 and 2 above, extract the necessary 2
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I and salient features that diesel reliability programs.should have to provide 1
assurance of achieving the target aiesel rcailability.
The guidelines will be written in terms of steps to (1) establish a diesel reliability program, and (2) operate a diesel reliability program.
The guidelines of necessity must be general enough to apply to all diesels and diesel subsystems in U.S.
i nuclear power plants.
Yet they must be specific enough to be understandable l
and implementable by plant personnel.
They must also be useable by NRC staff to evaluate whether or not industry diesel reliability programs are adequate to achieve the stated diesel availability goal.
The product from this task will be a set of draft guidelines for comment, reported in a short task report.
TASK 4:
REVIEW TASK PRODUCTS The objective of this task is to provide for a timely technical peer review of the products resulting from Tasks 1, 2 and 3.
A separate review team consisting of experts not on the project team-will be established.
The review team will perform a timely review of all tasks reports, as they become available, and will issue a letter report describing the results of each such review.
The project team will incorporate the recommendations of the reviewJteam, as appropriate.
In
- addition, the review team will participate in the project kick-off meeting to be held at the initiation of the project.
The products from this task will be the letter reports issued by the review team documenting the peer review of each Task' report.
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DIESEL RELIABILITY PROGRN1 GUIDELIrlES s
TASK SEQUEf4CING AfiD MAJOR PRODUCTS 1 March 1 April 1 May i
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I TASK 1:
(Top-down RP Definition) 1 2
3 TASK 2:
(Bottom-up Analysis for A
A Focus) y 4
rASK 3:
(Write
- uidelines)
A 1
5 6
fASK 4:
(Review)
A A
A 1
7 8
9 1.
Project inception / kick-off meeting.
2.
First draf t of top-down approach to define a diesel reliability program.
3.
Task I task report, defining a diesel reliability progran from the top-down.
4.
Task 2 task report, indicating major diesel f ailure modes, causes, and options for corrective actions.
5.
Inception of Task 3, development of guidelines for diesel reliability programs.
6.
Task 3 report describing guidelines for diesel reliability programs.
7.
Review of first draft of top-down approach to define a diesel reliability program completed.
8.
Review of Task I and Task 2 report completed.
9.
Review of guidelines completed.
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i REFERENCES t
1.
" Effectiveness of Reliability Technology Applicable To LWR Operational Safety", Azarm, M. A., Lofgren, E. V., et al, NUREG/CR-4618, BNL-NUREG-51995, April 30, 1986, Brookhaven National Laboratory.
2.
"A Reliability Centered Surveillance Concept For Nuclear Power Plant Standby Safety Equipment:
Definitions, Risk Considerations, and Issues (revised draft)",
E.
V. Lofgren, December 9, 1986, SAIC report for Brookhaven National Laboratory, OSRR Project.
l l
l 3.
" Enforcement of Onsite Emergency Diesel Generator Reliability," February 1979.
l 4.
" Reliability of Emergency AC Power Systems at Nuclear Power Plants", July 1983.
l l
5.
" Emergency Diesel Generator Operating Experience, 1981-1983", December 1985.
6.
NSAC/108, "The Reliability of Emergency Diesel Generators at U.S.
Nuclear Power Plants",
Electric Power Research Institute, September 1986.
7.
NUREG/CR-4557, "A Review of Issues Related to Improving Nuclear Power Plant Diesel Generator Reliability", April 1986.
i
Safety Review Procedures (SRP) for Diesel Reliability Proaram l
A.
Assure that a task is specified for analysis of the surveillance needs for the equipment.
B.
Assure that there is a task to monitor equipment performance, using both statistical trending and engineering data, to spot dearadations in performance.
C.
Assure that a reliability / availability target has been established for the equipment, and that the performance monitoring scheme includes, but is not limited to, monitoring against this target.
l D.
Assure that the proposed reliability program has a prioritization scheme for reliability problem correction, and scheduled and unscheduled repairs.
E.
Assure that there is a root cause task to systematically reduce l
identified problems to correctable causes.
l F.
Assure that the maintenance policy accounts for both the reliability l
implications and characteristics of failures, and the equipment reliability / availability target.
G.
Assure that a formal problem close-out procedure ' is required which involves (1) establishing criteria for problem closeout when a reliability problem is detected, and (2) providing monitoring and formal problem closeout procedures to assure that the criteria have been satisfied.
H.
Assure that a data gathering,
- storage, and retrieval sy stem with sufficient capabilities to support all other features of the t
reliability program is in place, or will be implemented as part of the system.
I.
Assure that there are clear line responsibilities and management controls in place to identify responsible individuals for implementing and operating the reliability program management system.
l 1
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Accendix A: Analysis of Diesel Generator Surveillance Needs A.1 Introduction A.2 Issues to Consider When Addressing Diesel Generator Surveillance Needs.
i A.3 Techniques to Address the Issues j
A.4 Interfaces With Other Reliability Program Tasks.
A.5 Establishing the Task of Analyzing Diesel Generator Surveillance Needs.
l Appendix B: Monitor Eauipment Performance B.1 Introduction.
B.2 Issues to Consider When Monitoring Equipment Performance.
B.3 Techniques for Addressing the Issues.
1 B.4 Interfaces With Other Reliability Program Tasks.
B.5 Establishing an Equipment Performance Monitoring System.
Appendix C:
Diesel Generator Reliah11ity/ Availability Taraet 5
C.1 Introduction.
C.2 Issues to Consider When Establishing a Diesel Generator Target.
C.3 Techniques for Addressing the Issues.
C.4 Interfaces With Other Reliability Program Tasks.
4 C.5 Establishing a Diesel Generator Reliability / Availability Target.
Anoendix 0:
Prioritization for Corrective Action Implementation D.I Introduction.
D.2 Issues to Consider When Prioritizing Diesel Generator Corrective Actions.
D.3 Techniques for Addressing the Issues.
D.4 Interfaces With Other Reliability Program Tasks.
D.5 Establishing a Corrective Action Task for Diesel Generators.
2
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Aonendix E:
Identification of Correctable Causes E.1 Introduction E.2 Issues to Consider When Performing Diesel Generator Root Cause Evaluations.
E.3 Techniques for Addressing the Issues.
E.4 Interfaces with Other Reliability Program Tasks.
E.5 Establishing a Root Cause Task for Diesel Generators.
Accendix F:
Reliability-Based Maintenance Policy F.1 Introduction.
j F.2 Issues to Consider for Diesel Generator Reliability-Based Maintenance Policy.
F.3 Techniques for Addressing the Issues.
F.4 Interfaces With Other Reliability Program Tasks.
l F.5 Establishing a Diesel Generator Reliability-Based Maintenance Policy.
Appendix G: Diesel Generator Problem Closecut Procedure 1
G.1 Introduction.
G.2 Issues to Consider for Closing Diesel Generator Reliability Problems.
G.3 Techniques for Addressing the Issues.
G.4 Interfaces With Other Reliability Program Tasks.
G.5 Establishing a Diesel Generator Problem Closecut Procedure.
Apoendix H:
Diesel Generator Data System H.I Introduction.
H.2 Issues to Consider for a Diesel Generator Data System.
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H.3 Techniques for Addressing the Issues.
I H.4 Interfaces With Other Reliability Program Tasks.
H.5 Establishing a Diesel Generator Data System.
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i Appendix I: Manaaina a Diesel Generator Reliability Proaram I.I Introduction.
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1.2 Issues to Consider for Managing a Diesel Generator Reliability Program.
I.3 Techniques for Addressing the Issues.
I.4 Interfaces Wit 5 Other Reliability Program Tasks.
I.5 Establishing Management of a Diesel Generator Reliability Program.
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Problem Detection Reliability Centered Surveillance (RCS) Tasks Analysis of Other Diesel Diesel Generator Generator RCS Surveillance Tasks fieeds (Appendix A)
Perspective on How item A, Analyses of Diesel Generator Surveillance Needs, Fits into a Reliability Program
TASKS NECESSARY TO ESTABLISH AN RCS PROGRAM SET PREPARE DEVISE DEFINE REUABILITY EVALUATE SURVEILLANCE COMPONENT EQUIPMENT SET TO INCLUDE IN TARGETS FOR SURVEILLANCE PLAN TO PERFORMANCE EQUIPMENT IN NEEDS MEET THE MONITORING RCS PROGRAM RCS PROGRAM NEEDS PROGRAM I
TOP-LEVEL WORK BREAKDOWN STRUCTURE SHOWING TASKS NECESSARY TO ESTABLISH A R ELI ABILITY CENTERED SURVEILLANCE PROGRAM i
l TASKS NECESSARY TO ESTABLISH A RCS PROGRAM DEFINE SET RELIABILITY PREPARE DEVISE EVALUATE COMPONENT EQUIPMENT SET TARGETS FOR SURVEILLANCE SURVEILLANCE PERFORMANCE TO INCLUDE IN EQUIPMENT IN PLAN TO MEET NEEDS pp[cp((
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APPENDIT A:
ANALYSIS OF DIESEL CENERATOR SURVEILLANCE NEEDS A.1 INTRODUCTION Objective of Appendix.
e Purpose of analyzing surveillance needs.
Refer to Reliability Centered Surveillance (RCS) documentation for o
subset of reliability program treated by this Appendix.
Roadmap to Appendix.
e A.2 ISSUES TO CONSIDER WHEN ADDRESSING DIESEL CENERATOR SURVEILLANCE NEEDS Refer to Figure A-1 for issues that must be addressed.
e Fas analvsis of surveillance needs considered test adeausev7
)
Define test adequacy.
e Example (s) illustra".ing test adequacy.
e e
Statement of why it is important to consider test adequacy when developing diesel surveillance plan.
References for further detail /information.
e Has analysis of surveillance needs considered test efficiency?
Define test efficiency.
e Example (s) illustrating test efficiency.
e 1
.. - ~. _.. - -. - - -..
Assure task to analyze and specify surveillance needs Assure Assure the surveillance surveillance plan needs have been has been prepared analyzed and is adequate
-Test adequacy considered?
_Does surveillance plan define e ypes sunell ance
_ Test efficiency considered?
to be used?
Aging <-onsidered?
_Does surveillance plan define the intervals for each
-Common cause considered?
proposed surveillance type?
-Failure mode frequency, Does the surveillance plan severity and cause. considered.,
- treat surveillance schedules, including synchronization with other tests?
Figure A-1.
Issues to Address to Assure There is a Task to Specify Diesel Surveillance Needs
e Statement of why it is important to consider test efficiency when i
developing diesel surveillance plan.
(
References for further detail /information.
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Has analysis of surveillance needs considered detection of anine conditions?
e Define what is meant by aging conditions.
i Example (s) illustrating aging conditions.
e e
Discusses why it is important for diesel surveillance to be able to detect aging.
1 References for further detail /information.
e Has analysis of surveillance needs considered the need to detect common cause failures?
Define common cause diesel failure.
e 1
Example (s) illustrating common cause diesel failure.
e e
Statement of why it is important to provide surveillance that will protect against undetected common cause.
References for further detail /information.
o 1
Has analysis of surveillance needs considered historical diesel failure l
causes and severities that could impact settine demand test intervals?
e Define the relationship between diesel unavailability and demand test interval, when failure and repair frequencies that are due to standby stress and demand stress causes are considered.
Example (s) illustrating the issue.
e 3
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Discussion of why it is important to consider this issue when f
preparing the diesel surveillance plan.
l References for further detail /information.
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Has a surveillance plan been develoved to codify the results of the l
above described analyses of diesel surveillance needs?
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e Define considerations for surveillance plan completeness and j
adequacy.
j Does the surveillance olan define the types of surveillance to be used for the subiect diesels?
e List and define the possible types of surveillance that can be i
used for diesels?
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e Describe the characteristics of each vis-a-vie diesel failure detection, j
i e
Characterize each type of surveillance technique verus each type of diesel reliability problem previously discussed above.
j I
Does the surveillance plan define the intervals for each nronosed surveillance tvoe?
e List the considerations that must go into the decision process to specify surveillance intervals, 1
l List the diesel-specific issues that must be addressed.
e e
Refer to documentation.
Does the surveillance olan treat surveillance schedules.
includinr.
synchronization with other tests?
o List the issues to be addressed, including staggard testing for systems and functions.
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Refer to more detailed documentation (e.g.,
Proj ect to Evaluate Technical Specifications (PETS), documentation).
A.3 TECHNIQUES TO ADDRESS THE ISSUES Techniaues to evaluate test adecuaev Test and surveillance " coverage".
e Internally redundant pieceparts.
e Methods for investigating test adequacy for diesels.
Reference to OSRR project.
e Reference to operational system effects analysis methods.
e References for more detailed descriptions of techniques, e
i Technioues to evaluate test efficiency I
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Data analysis approach-relate incipient conditions to later catas-l trophic failures.
Condition monitoring of diesel parameters.
e References to more detailed descriptions.
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Technioues to evaluate anine conditions i
Diesel performance tracking.
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Engineering and statistical tracking.
e Condition monitoring.
Reference to Appendix B.
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i References to aging investigations and implications for diesels.
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l Technioues for providinn surveillance for common cause l
Technique for identifying common cause systems.
e Reference to work-in-progress.
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Technioues for ootimizine demand test intervals Summary of failure severity / failure cause method for optimizing demand test intervals.
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References to more detailed discussion of technique, and examples e
for diesels.
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A.4 INTERFACES WITH OTHER RELIABILITY PROGRAM TASKS l
j Figure __ illustrates the interfaces of diesel surveillance with e
other reliability programm tasks.
Discuss interface of surveillance with performance monitoring.
e e
Discuss interface of surveillance with root cause and corrective action tasks.
I A.5 ESTABLISHING THE TASK OF ANALYZING DIESEL GENERATOR SURVEILLANCE NEEDS e
Define skills needed to analyze diesel generator surveillance needs l
l e
Discuss use of techniques in Section A.3 to consider all the issues.
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e To summarize, the diesel relaibility program should specify the following:
4 Diesel generator boundary, in terms of subsystems and pieceparts, and coverage provided by surveillance.
4 j
Diesel generator availability target, including how it 1
is to be measured, and how surveillance will provide the 4
1 measures.
5 The surveillance interval, by type.
1 The list of incipient conditions that are triggers for i
performing preventive maintenance, and the surveilance type (including condition monitoring) that will be used to detect each such incipient condition.
1 Guidelines for avoiding certain simultaneous equipment
- outages, or alignments away from the safe condition,
{
when an unacceptable risk would result from such outages or alignments.
Guidelines for detecting common cause failures and surveillance for protecting against these.
2 The observables and information, including those provided by surveillance, that will be fed into the component performance monitoring task.
4 Guidelines for determining under what conditions diesel surveillance will be altered to accomodate an unforseen reliability problem.
f i
Emd45uhA. l i
SAFETY ISSUE B-56 DIESEL RELIABILITY EDG RELIABIllTY PROGRAM GUIDELINES 4/22/87 MEETING l
l A. W. SERK1Z RES/DRPS RPSI 301-492-7487 4
i 5
l Agenda for B-56, EDG Reliability Meeting (4/22/87) l 9:00 a.m.
Background and Needs A. Serkiz l
l 9:30 a.m.
Work Breakdown and Review E. Lofgren/
l Assignments A. Payne i
l 10: 00 a.m.
Proposed Elements of a Diesel E. Lofgren Reliability Program 1:00 p.m.
Example of Surveillance Needs E. Lofgren for Equipment 3:00 p.m.
Closing Discussions, Consensus A. Serkiz Gathering and Work Assignments 1
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l OVERVIEW i
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STATION BLACKOUT (USI A-44)
EMERGENCY DIESEL GENERATORS (EDGS)-*"-
l
---*- SAFETY I SSUE B-56, DIESEL REL I ABil. ITY 1
l l
B-56 WILL DEVELOP RECOMMENDATIONS
-me--
l FOR EDG RELIABILITY PROGRAMS GOAL OF THIS TASK FORCE DEVELOP SET OF USEFUL GUIDELINES FOR USE IN RESOLVING USI A-44 i
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l 1
i USI'A-44 STATUS STAFF AND CONTRACTORS HAVE EXTENSIVELY ANALYZED
]
INDUSTRY EXPERIENCE A PROPOSED RULE CHANGE AND DRAFT REGULATORY GUIDE J
(R.G.) WERE ISSUED "FOR COMMENT IN 3/86 i
NUMARC PROPOSED INDUSTRY INITIATIVES IN 6/86 TO ADDRESS i
l THE MORE IMPORTANT CONTRIBUTORS TO STATION BLACKOUT l
STAFF DISCUSSIONS WITH flUMARC/NUGSB0 GROUP CONTINUE PUBLIC COMMENTS RECEIVED HAVE BEEN REVIEWED BY STAFF AND INCORPORATED INTO REVISED PROPOSED RULE AND R.G.
STAFF RECOMMENDED PROCEEDING WITH RULEMAKING; MGMT l
CONCURRED USI A-44 SCHEDULED FOR.CRGR REVIEW IN 5/86 1
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l Planned B-56 Work Assignments l
Develop EDG External NRC l
Reliability Technical Staff Overview Reviewers Reviewers E. Lofgren, SAI A. Payne, SNL A. Serkiz, NRC J. Fragola, SAI
-L. Kripps, EI
-E. Murphy W. Henderson, Trident
-R. Wyrich, INP0
-E. Trottier
. G. DeMoss, SAI J. Gaertner, EPRI
-A. Rubin P. Appioni, SAI R. Brush,PeakerC?.)
C. Johnson J. Boccio, M1 ~ibHL T. Cox M. Taylor i
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Task 4 1 Kick-off Meeting' (4/22/87) 2 Draft EDG Reliability Program Template
- 3. Task 1 final dhaft 4 Draft report for Failure Modes and Underlying Causes
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5 Task 2 final draft report 6 External technical review of Task 1 initial draft & progress on Task 2 7 External technical review of Tasks 1 & 2 reports & progress on-Task 3 8 Task 3 (Guidelines for Diesel Reliability Program) 9 ' Final meeting for review & consensus Schedule for Diesel Reliability Guidelines Program Task 1:
Develop 0verview Templates for EDG Reliability Program Task 2:
Identify Diesel Failure Modes, Causes & Recommended Fixes Task 3:
Develop Guidelines.for EDG Reliability Program i
i Task 4:
External Technical Review of Task Products
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f TASK 5 NECESSARY TO ESTABLISH AN RCS PROGRAM PREPARE DEVISE SET SURVEILLANCE COMPONENT EVALUATE PERFORMANCE DEFINE R elf AGILITY PLAN TO SURVEILLN4CE EQUIPMENT SET TARGETS FOR MEET THE MONITORING NEEDS TO INCLUDE IN EQUIPMENT IN NEEDS PROGRAM RCS PROGRAM RCS PROGRAM t.4 %T NEED$
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TO 46.EEACKtD3 EQAMM (g_4a.
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NECESSARY TO ESTABLISH A RELIABILITY CENTERED f
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TASKS NECESSARY TO ESTADLISH A RCS PROGRAM f////
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Ap ib DEFINE D EFINE DEFIN E 4,
TYPES OF SURVEILLANCE suSc EoSNC g%4I[l SURVEILLANCE INTERVALS FOR INCLUOLNG SYP[CH.
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DEFINE DEFINE DEFINE DEFINE GUIDANC E
. COM PUTATIONS DECISION INFORMATION
.TO PERFORM.
TO GIVE CRITERIA AND WHEN PROBLEMS TO RECORD INCLUDING ALERT LEVELS ARE INDICATED AND STORE TRENDING Figu re 3-3.
EXPANDED WORK BREAKDOWN STRUCTURE SHOWING TASKS NECESSARY TO ESTAB LISH A RCS PROGRAM
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[#a ancgo, UNITED STATES CyS:
ISylor
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- ' 'n NUCLEAR REGUL ATORY COMMISSION Sniezek i
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.E W ASHINGT ON,0.C. 205ss Blaha I
J Knubel nnen, E l
March 25. 1993 OFFICE OF THE SE CFIE T ARY MEMORANDUM FOR:
James M. Taylor Executive Director for Op ptions FROM:
Samuel J. Chilk, Secretar'
SUBJECT:
SFCY-93-044 - RESOLUTION /OFhENERICSAFETY ISSUE B-56, " DIESEL GENERATCR RELIABILITY" The Commission (with all Commissioners agreeing) has approved Option 4, as recommended by the staff.
In approving Option 4, the Commission would like to emphasize the following thoughts and j
concerns:
The importance of maintaining ac power, and consequently in l
having reliable diesel generator performance, in assuring a low likelihood of core damage has consistently been shown in risk assessment studies.
Since promulgation of the station blackout rule, the nuclear industry has made real progress in improving the reliability of diesel generators to start and run upon demand, and the current industry-wide average reliability, in excess of 98 percent, is quite satisfactory.
In balancing the recognition of these efforts and the high level of actual diesel generator reliability 1
achieved against the clear need to maintain such performance, the Commission believes a rule is not necessary.
Nevertheless, the Commission considers it imperative that this action not be misinterpreted as a signal that past efforts and vigilance can now be relaxed or possibly disbanded.
Hence, the industry should continue an aggressive program of maintenance as well as root cause analysis that will continue to offer assurance that diesel generator reliability will be maintained at a satisfactory level in the future.
SECY NOTE:
THIS SRM, SECY-93-044, AND THE VOTE SHEETS OF ALL COMMISSIONERS WILL BE MADE PUBLICLY AVAILABLE 10 WORKING DAYS FROM THE DATE OF.THIS SRM Q)o OS%
N 9fp.
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- r. Finally, the staff and industry should focus on (1) evaluation methods and techniques that will permit rapid and early means of detecting significant degradation of diesel generator reliability, (2) examine diesel generator testing frequency and balance these with considerations of additional wear, and (3) explore the potential vulnerabilities of those applications where fewer than two safety-related power sources per unit, on average, are installed.
cc:
The Chairman Commissioner Rogers Commissioner Curtiss Commissioner Remick Commissioner de Planque OGC OIG Office Directors, Regions, ACRS, ACNW (via E-Mail)
OP, SDBU/CR, ASLBP.(via FAX)
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NOTATION V0TE i
4 RESPONSE SHEET i
i 1
T0:
SAMUEL J. CHILK, SECRETARY OF THE COMf4ISSION I
FROM:
C0144ISSIONER DE PLANQUE i
j
SUBJECT:
SECY-93-044 - RESOLUTION OF GENERIC SAFETY ISSUE B-56, " DIESEL GENERATOR RELIABILITY" i
l APPROVED xx DISAPPROVED ABSTAIN NOT PARTICIPATING REQUEST DISCUSSION l
COMMENTS:
i
]
I approve staff Option 4 and concur in Chairman Selin's comments.
1 i
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s SIGNATyfiE i
RELEASE VOTE
/ xx /
March 18, 1993 DATE WITHHOLD VOTE
/
/
ENTERED ON "AS" YES xx NO j
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ME<s -t
^
NOTATION V0TE I
RESPONSE SHEET T0:
SAMUEL J. CHILK, SECRETARY OF THE COMMISSION l
~
FROM:
C0141ISSIONER R0GERS l
SUBJECT:
SECY-93-044 - RESOLUTION OF GENERIC SAFETY ISSUE B-56, " DIESEL GENERATOR RELIABILITY" APPROVED c257e-rs DISAPPROVED ABSTAIN NOT PARTICIPATING REQUEST DISCUSSION C0141ENTS:
sy 3ru w seme bA SIGNATURE M
RELEASE VOTE
/
/
k liil DATE WITHHOLD VOTE
/
/
0 4
.jf SECY-93-044, RESOLUTION OF GENERIC SAFETY ISSUE B-56, " DIESEL GENERATOR RELIABILITY" l
l Approval with comments.
i i
i l
While I believe that option 5 as recommended by the Office of General Counsel captures many desirable attributes of this multi-faceted policy issue, on balance, I accept that the staff does i
not believe that rulemaking is necessary.
Although Option 4 may i
make more difficult appropriate enforcement action for EDG failures, I accept that in significant cases the staff has sufficient regulatory latitude under the Maintenance Rule or 10 CFR 50, Appendix B, to take appropriate enforcement action.
Therefore, I am able to support the majority Commission position and approve Option 4.
%kb.
Kenneth C.
Rogers Commissioner I
1 I
1 1
Ato&-t NOTATI0N V0TE RESPONSE SHEET T0:
SAMUEL J. CHILK, SECRETARY OF THE COf41ISSION.
FROM:
COMMISSIONER REMICK
~
SUBJECT:
SECY-93-044 - RESOLUTION OF GENERIC SAFETY ISSUE B-56, " DIESEL GENERATOR RELIABILITY"
,/ci d
l APPROVED X
DISAPPROVED ABSTAIN NOT PARTICIPATING REQUEST DISCUSSION COMMENTS:
39 y opfun 9 sn J con en u
I appsw g,m,,,
se//h 6 c ~ ~nA i
/
~
' SIGNATURE RELEASE VOTE
/X /
// #"' 97 DATE i
WITHHOLD VOTE
/
/
g ENTERED ON "AS" YES /
NO O
'r JEoc.-
j
.X N0TATION V0TE h
l RESPONSE SHEET i
t i
l T0:
SAMUEL J. CHILK, SECRETARY OF THE COMMISSION i
FROM:
COIEISSIONER CURTISS i,
SUBJECT:
SECY-93-044 - RESOLUTION OF GENERIC SAFETY ISSUE B-56, " DIESEL GENERATOR RELIABILITY" l
I X
i APPROVED w/ comment DISAPPROVED ABSTAIN i
l Nor PARTICIPATING REQUEST DISCUSSION l
4 i
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C0fEENTS:
)
1 l
l See attached comment.
i 0
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4 s
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SIGNATURE RELEASE VOTE
/ X
/
March 8, 1993.
DATE WITHHOLD VOTE
/
/
DoY
/ f8 ENTERED ON "AS" YEs No x
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l Commissioner Curtiss' comments on SECY-93-044:
I commend the staff for the thoughtful analysis of the regulatory 1
options for the resolution of Generic Safety Issue B-56,
" Diesel i
Generator Reliability", in the subject SECY paper.
I believe the staff's recommendation to adopt Option 4 is a sound approach that gives due consideration to:
(1) the industry's current level of performance; (2) the industry's resolve to implement the diesel generator reliability guidance developed under NUMARC Initiative j
5A; and (3) the NRC's promulgation of 10 CFR 50.65, the maintenance rule, subsequent to the issuance of the proposed revision to 10 CFR 50.63.
Accordingly, for the foregoing reasons, I support Option 4.
If, however, industry is unable to accomodate this approach through the integration of the diesel generator reliability guidance developed under NUMARC Initiative 5A with the NUMARC Maintenance Guideline for maintenance rule j
implementation, I would direct the staff to pursue Option 1.
i i
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/
NOTATION V O^T E 4
3 l
RESPONSE SHEET i
T0:
SAMUEL J. CHILK, SECRETARY OF THE COMMISSION
~
i l
FROM:
THE CHAIRMAN
SUBJECT:
SECY-93-044 - RESOLUTION OF GENERIC SAFETY j
ISSUE B-56, " DIESEL GENERATOR RELIABILITY" i
f 1
APPROVED x
DISAPPROVED ABSTAIN i
)
l NoT PARTICIPATING REQUEST DISCUSSION 1
i C0t44ENTS:
1 1
See attached comments.
i
)
3 i-l l
j i
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l SIGNATURE RELEASE VOTE
/
/
5/ /fJ DATE WITHHOLD VOTE
/
/.
0 " x@ f
/
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ENTEREDLON "AS" YES s /
No
/
1.
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1
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/ -
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Chairman's comments on SECY-93-044 l
l I approve the staff's proposed option, but I would like to emphasize the following thoughts and concerns:
The importance of maintaining ac power, and consequently in having reliable diesel generator performance, in assuring a low likelihood of core damage has consistently been shown in risk assessment studies.
Since promulgation of the statica blackout rule, the nuclear l
industry has made real progress in improving the reliability of diesel generators to start and run upon demand, and the current industry-wide average reliability, in excess of 98 percent, is quite satisfactory.
In balancing the recognition of these efforts and the high level of actual diesel generator reliability achieved against the clear need to maintain such performance, I
believe that a rule is not necessary.
Nevertheless, I consider it imperative that this action not be misinterpreted as a signal that past efforts and vigilance can now be relaxed or possibly disbanded.
Hence, I urge both staff and the industry to continue with an aggressive program of maintenance as well as root cause analysis that will continue to offer assurance that diesel generator reliability will be maintained at a satisfactory level in the future.
Finally, I urge that staff and industry focus on (1) evaluation methods and techniques that will permit rapid and early means of l
detecting significant degradation of diesel generator reliability, (2) examine diesel generator testing frequency and balance these with considerations of additional wear, and (3) i explore the potential vulnerabilities of those applications where fewer than two safety-related power sources per unit, on average, l
are installed.
l I
-