ML20042B974
| ML20042B974 | |
| Person / Time | |
|---|---|
| Issue date: | 03/16/1982 |
| From: | NRC COMMISSION (OCM) |
| To: | |
| Shared Package | |
| ML20042B973 | List: |
| References | |
| REF-10CFR9.7 NUDOCS 8203290066 | |
| Download: ML20042B974 (17) | |
Text
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g COMMISSION BRIEFING 8
jE ON AEOD PROGRAM AND CAPABILITIES TO PERFORM TREND AND PATTERN ANALYSES C. MICHELSON, DIRECTOR C. J. HELTEMES, DEPUTY DIRECTOR MARCH 16, 1982
6 C
Current AEOD Analysis and Evaluation Program i
SCREENING OPERATIONAL ENGINEERING CASE EVENTS
- Plant Events EVALUATION STUDY
- Generic Concerns y
- Significance
- AO/NEA Reports
- Power Event Reports SUPPLEMENTAL DATA
- Onsite Visit
- Engineering Data
- Probabilistic/
Reliability Studies l
NSIC DATA COMPUTER l
l FILE SEARCHING Selected
- Keyword information
- Text Searches Encoded from LER Form
r ANALYSIS AND EVALUATION PROGRAM DEFINITIONS ENGINEERING EVALUATION - A PRELIMINARY INVESTIGATION OF DATA AND INFORMATION FOR AN EVENT OR SITUATION (E.G., A TREND OR PATTERN) TO ASSESS SIGNIFICANCE AND DETERMINE IF AN IN-DEPTH INVESTIGATION IS NEEDED.
CASE STUDY - AN IN-DEPTH INVESTIGATION OF A SIGNIFICANT EVENT OR SITUATION (E.G., A TREND OR PATTERN).
TREND - THE GENERAL COURSE, PREVAILING TENDENCY OR PARTICULAR DIRECTION (E.G., OF OCCURRENCES), INCLUDING CONSTITUENTS AND CONSEQUENCES.
PATTERN - A DISTINCTIVE COMBINATION OR CONFIGURATION (E.G., OF OCCURRENCES), INCLUDING CONSTITUENTS AND CONSEQUENCES, THAT SUGGESTS A MODEL OR GUIDE FOR BEHAVIOR OR FUNCTIONAL CHARACTERIZATION.
1 D
t CASE STUDY REPORTS ISSilED BY AE0D
(
e SPECIFIC PLANT EVENTS e
8ROWNS FERRY 3 FAILURE TO SCRAM e
BROWNS FERRY 3 WATER DETECTION IN SCRAM DISCHARGE VOLilME e
ARKANSAS NilCLEAR ONE LOSS OF OFFSITE POWER e
ST. LilCIE 1 NATURAL CIRCULATION C00LDOWN e
CRYSTAL river 3 LOSS OF NONNUCLEAR INSTRilMENTATION e
MILLSTONE 2 LOSS OF 125V DC e
CALVERT CLIFFS 1 LOSS OF SERVICE WATER e
SAN ONOFRE 1 LOSS OF SALT WATER COOLING EVENT
- e GENERIC REPORTS e
PIPE BREAKS IN BWR SCRAM SYSTEM e
STEAM GENERATOR OVERFILL / COMBINED PRIMARY AND SECONDARY SIDE BLOWDOWN e
BWR VESSEL LEVEL INSTRUMENTATION e
SERVICE WATER FLOW BLOCKAGES BY MARINE GROWTHS S
VALVE OPERATOR-RELATED EVENTS OCCURRING DilRING 1978, 1979, AND 1980*
ISSUED FOR PEER REVIEW
t AEOD ENGINEERING EVALUAlIONS AND CASE STUDIES IN PROGRESS e
SPECIFIC PLANT EVENTS e
HATCH HPCI AND RCIC RELIABILITY STUDY a
POINT BEACH BUS TIE BREAKERS 6
NORTH ANNA 1 ELECTRICAL DISTRIBUTION SYSTEM PROBLEMS e*
61NNA STEAM GENERATOR IUBE RUPTURE EVENT e
BRUNSWICK EQUIPMENT 00ALIFICATION PROBLEM DUE TO MAINTENANCE INADE0llACIES e
LOSS OF ALL'RHRSW DUE TO PLUGGED INSTRUMENT LINES AT BRilNSWICK e
SALEM LOAD REDUCTION IRANSIENT e
GENERIC STUDIES e
REACTOR COOLANT PUMPS e
WATER HAMMER EXPERIENCE IN BWR HPCI SYSTEMS e
EFFECTS OF OVERPRESSURIZING AIR SYSTEMS 9
DECAY HEAT REMOVAL AT B3W' PLANTS e
NATURAL CIRCULATION AFTER SCRAM e
STEAM GENERATOR TUBE DEGRADATION e
INSTRUMENT AND CONTROL AIR SYSTEMS e
WATER HAMMER IN BWR RHR PIPING SYSTEMS e
INTERNAL APPURTENANCES.:i BWR PIPING SYSTEMS e
AIR IN CIRCULATING WATER SYSTEMS e
FAILURE MODE OF HIGH VOLTAGE ELECTRICAL EQUIPMENT e
DIESEL GENERATOR AIR START PROBLEMS e
WATER IN DIESEL FUEL DIL SYSTEMS e
STORAGE AND DISTRIBUTION OF PRESSURIZED GASES
- 4 FAILURE CONSEQUENCES OF HIGH VOLTAGE ELECTRICAL EQUIPMENT *
- BEING PERFORMED BY NSIC
d
_ COMPOSITION OF A LICENSEE EVENT REPORT e
LICENSEE TRANSMITTAL LETTER e
LER FORM e
ATTACHED SUPPLEMENTAL INFORMATION e
EXAMPLES SAN ONOFRE 1 LER 80-006 SALEM 1 LER 78-073 9
ll
l I,
ER0 POSED LER RULE DEVELOPED TO CORRECT PROBLCMc WITH EXISTING REPORTING REQUIREMENTS:
e ALL EVENTS OR FAILURES IMPORTANT TO SAFETY ARE NOT REQUIRED TO BE REPORTED, E.G.,
REACTOR SCRAMS.
e MANY EVENTS WHICH ARE NOT INDIVIDUALLY SIGNIFICANT ARE REQUIRED TO BE REPORTED, E.G.,
RANDOM COMPONENT FAILURES.
e MANY REPORTS DO NOT ASSURE A FULL UNDERSTANDING OF THE REPORTED EVENT OR FAILURE.
e THERE IS AN UNNECESSARY OVERLAP WITH OTHER REPORTING SYSTEMS, E.G.,
NUCLEAR PLANT RELIABILITY DATA SYSTEM (NPRDS).
e NRC REPORTING REQUIREMENTS DIFFER AND ARE NOT WELL COORDINATED, E.G.,
10 CFR 50 72 ON PROMPT REPORTING.
CONSEQUENTLY, THE STAFF RECOMMENDS THAT THE REPORTING OF OPERATIONAL DATA BE REVISED IN TERMS OF SCOPE, CONTENT, AND METHOD OF REPORTING.
4
3 PRESENT LER SYSTEM PROPOSED LER SYSTEM SCOPE OF REPORTING PLANT IECHNICAL SPECIFICATIONS PROPOSED LER RULE REPORT CONTENT R.G. 1 16 AND NUREG-0161 PROPOSED LER RULE e
TRANSMITTAL LETTER e
ABSTRACT e
LER FORM e
NARRATIVE REPORT e
SUPPLEMENTAL INFORMATION DATA STORAGE SCSS (ABSTRACT AND DATA MATRIX)
SCSS (ABSTRACT AND DATA MATRIX)
G BASED ON TRANSMITTAL LETTER, e
BASED ON LICENSEE LER FORM, AND SUPPLE [1 ENTAL ABSTRACT AND INFORMATION NARRATIVE REPORT NSIC (ABSTRACT AND KEYWORDS)
NSIC (ABSTRACT AND KEYWORDS) e BASED PRIMARILY ON LER FORM e
BASED ON LICENSEE (SOME SUPPLEMENTAL INFOR-ABSTRACT AND SCSS MATION)
DATA MATRIX NIH (ABSTRACT AND DATA FIELDS) e BASED ON LER FORM (NOW DISCONTINUED)
l i SEQUENCE CODING AND SEARCH SYSTEM (SCSS)
DEVELOPED TO CORRECT PROBLEMS WITH LER DATA STORAGE AND RETRIEVAL CAPABILITIES:
LER FORM ACCOMMODATES ONLY ONE COMPONENT, SYSTEM AND e
CAUSE, AND PROVIDES LIMITED SFACE FOR ABSTRACT OF ENTIRE EVENT.
e COMPUTER ABSTRACT IS INCOMPLETE SINCE IT IS BASED UPON LER FORM ABSTRACT WITH LITTLE OR NO CONSIDERATION OF SUPPLEMENTAL INFORMATION.
RETRIEVAL KEYWORDS BASED PRIMARILY UPON THE INCOMPLETE e
COMPUTER ABSTRACT.
ADDITIONAL TEXTUAL SEARCH RETRIEVAL METHOD ALSO BASED e
UPON THE INCOMPLETE COMPUTER ABSTRACT.
KEYWORDS DO NOT RELATE COMPONENTS TO SYSTEMS, CAUSES OR e
EFFECTS, ETC.
CONSEQUENTLY, AEOD : NITIATED THE SCSS PROGRAM IN ORDER TO RETRIEVE DESIRED INFORMATION WITH A HIGH DEGREE OF PRECISION AND COMPLETENESS.
h-
1 Planned AEOD Analysis and Evaluation Program OPERATIONAL EVENT ENGINEERING CASE EVENTS SCREENING EVALUATION STUDY
- Significance
- L 4L
- L
- AO/NEA Reports
, g
- Power Reactor Events SUPPLEMENTAL COMPUTER DATA SEARCHING 1 r
- Onsite Visit SEQUENCE STATISTICAL
- Engineering Data
- Probabilistic/
CODING ANALYSIS Reliability Studies
- Computer Readable COMPUTER Applicable r----
Format SORTING Watch List 3
- Defined System,
[
AEOD l
Component, Cause
- Predetermined l MONITORING l and Effect Codes Strategy
- Individual Steps L _,_,_ _ J
+
+.
and Sequence
. identified
+
l THE SE0llENCE CODING AND SEARCH SYSTEM (SCSS) e OBJECTIVE - REDUCES THE DATA AND INFORMATION CONTAINED IN THE LICENSEE TRANSMITTAL LETTER, LER FORM, AND ANY SUPPLEMENTAL INFORMATION TO A CODED FORMAT THAT IS COMPLETE AND BOTH COMPUTER-READABLE AND COMPilTER-SEARCHABLE.
e STRUCTURE - PROVIDES A STRUCTURED FORMAT FOR DETAILED CODING OF COMPONENT, SUB-SYSTEM AND SYSTEM LEVEL OCCURRENCES, INCLUDING FAILURES, COMMAND FAULTS AND ADVERSE PERSONNEL ACTIONS, AND IDENTIFI-CATION OF THE ORDER IN VHICH THEY OCCUR.
e APPLICATION - PROVIDES AE0D wITH A POWERFUL DATA BASE SEARCH CAPABILITY FOR ON-LINE EVALUATION OF CURRENT LER DATA AND INFOR-MATION, AND THE IDENTIFICATION OF TRENDS AND PATTERNS IN PAST OPERATING EXPERIENCE.
m
.. BASIC SCSS DEFINITIONS OCCURRENCE - A FAILURE, COMMAND FAULT OR ADVERSE PERSONNEL ACTION.
INFORMATION STATEMENT - A STATEMENT OF INFORMATION NOT INVOLVING AN OCCURRENCE.
SEQUENCE - A SET OF OCCURRENCES AND INFORMATION STATEMENTS THAT ARE RELATED TO EACH OTHER BY CONTRIBUTING TO THE CAUSE AND/OR RESULTING FROM THE EFFECT OF ONE OR MORE MEMBERS OF THE SET.
EVENT - A SET OF SEQUENCES REPORTED IN A SINGLE LICENSEE EVENT REPORT (LER).
STEP - ANY OCCURRENCE OR INFORMATION STATEMENT IN AN EVENT.
9
I OCCURRENCES FAILURE e
AN IMPROPER PHYSICAL ACTION OR INABILITY TO PERFORM AN INTENDED FUNCTION.
e REPAIR OR MAINTENANCE REQUIRED TO RESTORE TO A PROPERLY FUNCTIONING STATE.
COMMAND FAULT e
AN IMPROPER PHYSICAL ACTION OR INABILITY TO PERFORM AN INTENDED FUNCTION.
e NO REPAIR OR MAINTENANCE REQUIRED TO RESTORE TO A PROPERLY FUNCTIONING STATE.
ADVERSE PERSONNEL ACTION 8
A PERSONNEL ACTIVITY THAT PRODUCES AN INAPPROPRIATE
~
ACTION, OR FAILS TO PRODUCE AN INTENDED ACTION.
4
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TYPICAL SCSS DESCRIPTORS TYPE NUMBER TYPICAL EXAMPLES SYSTEM 166 DE - CONTAINMENT SPRAY SYSTEM EH - EMERGENCY POWER GENERATION SYSTEM COMPONENT 498 HX - HEAT EXCHANGER XCPT - CONTROL POWER IRANSFORMER CAUSE/EFFECT 179 CH - MECHANICAL VIBRATION IE - UNDERVOLTAGE PERSONNEL TYPE 6
PCP - CONTRACTOR PERSONNEL PLO - UTILITY LICENSED OPERATOR PERSONNEL ACTIVITY 11 PM - MAINTENANCE / REPAIR P0 - OPERATION PERSONNEL CAUSE/
EFFECT 27 SC - UNAWARE OF REQUIREMENT UB - CONSEQUENTIAL UNDESIRED COMMISSION
15.
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, LER SCSS DATA
. FEBRUARY 1r 1982
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DOCITT YEAR LER NUMBEft REVISION DCS NUMBER DATE'OF EVENT 206 1980 006 0
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COMPONENT, SUBSYSTEM, AND SYSTEM FAILURES AND COMMAND FAULTS e
ADVERSE PERSONNEL ACTIONS MULTIPLE COMPONENT, SUBSYSTEM, AND SYSTEM FAILURES AND COMMAND FAULTS COMMON CAUSE FAILURES AND COMMAND FAULTS CAUSE/EFFECT RELATIONSHIPS SYSTEM INTERACTIONS STATISTICAL EXAMINATIONS WATCH LIST MONITORING
.