3 . 1 Status arid Characteristics of Reliab_i_ii_tj/ Data _Base_s_ in__Mernber States A general review of some of the data bases in Member States has
been undertaken with two objectives, namely:
to give general information on the nature, the structure and the content of the different data bases.
to help in defining the specifications of new data bases.
Wot a]1 existing data bases are described here, because some countries were not represented. The participants tried, however, to reflect all the information known to them.
The main data bases described here are:
France: SRDF, SRDF--A, Event Fi Je
Federal Republic of Germany: FUV - Worddeutschland E.V.
German Democratic Republic: Reporting System Great Britain: PR/A, WUPLR
Hungary: Generic data bank, Component reliability data bank Italy: SDE, SEME, PACS
Japan: NSIS, FREEDOM - CRFDO Republic of Korea: PUMAS/W Spain: DACIUE, BD10, DACNF, B DC Sweden: A TV
CEC-JRC ISPRA: ERDS/CEDB, ERDS/AORS
Fhe status of the different data bases is described in Tables 3-1.
T ABI t 3 . 1 . Gen f rôti information
Country: Fh DURAI. REPUBLIC OF GLRMANY (I-RG)
Warne of the Da ta Base
DCU R A
Operator/
Manager Type of information in OB
l UV -N
Component failure
Main purpose rev tow of operational plant experience reliability parameter comparison actual with reference data
Date of start 1986
Conditions of
No. of in principal, all safety components of I\IPP monitored
cornp. s/uni t
Status in operation No. of records ~ '3000
(-end 198/)
Components/ all types (see d event
Types and No. 2 BWR of units 3 PWR concerned
confidential
Country: I- RAWCE
T A B L E 3.1, Gene roi] information (Continued)
Name of L he Type of Component faiiure Component failure Fvents
information in DB
Main purpose PSA maintenance PSA maintenance Operating Experience Analysis
Date of Start 1978 1984 1980
No, of monitored 600 cornp. s/unit
> SOU
Status in operation in operation in operation
No. of records of units concerned 10 x 1300 MW PWR
Siqnifi cant
TABLF 3.1. GeneraJ informâtjon (Continued) Country: German Democratic Republic (GDR)
Name of the Data Base
Report i ng Sys tern
Manager/
Operator
National Board on Atomic Safety and Radiation PruU-i lion
Type of Abnormal events of safety related systems information
in OB
Main purpose Safety evaluation of NPP Date of s U r t- 19/6
in opcr ,-il ion No. of
Monitored comp.s/un i l
10000 components
Status In operation
No. of records Data accumulated in 60 reactor years (end 1987)
Components/ Events from off-normal reports Event
Type and No. PWR -- 5 units - 440 MWe (WER) of units
concerned
"l ABI K 3 . 1 . General i rif or mat i on (CoriUnued) Country: GREAT BRLTAIN
Name of the Plant Reliability/Availability The Nuclear Plant Puent Data Base D.B, - Safety Systems Recording System (NUPI: R)
(PR/A)
Manager/ CH58 CRJB
Operator Production Planning Department Mue3ear Coordination Group Type of Component h vont reports
information in DB
Main purpose To gather quantitative To collect and transmit information on a v a i l a b i l i t y information on safety and reliability related events
Date of start January 1988 for safety March 198*5 system reliability
Wo. of Of the of 500 dpend ing on Not relevant monitored the complexity of plant
comp,s/unit)
Status At pilot scheme stage Fully operational, but evolving No, of records ^ero '300 event reports,
(end 1987) (growing by 5 per year)
Components/ Safety related components in Fvents of safety significance Events systems
Types and Wo. All GEGB Magnox with concrete All gas cooled reactors in UK of units pressure vessels, and all CEGB (40 reactors), with significant concerned AGRs: 14 units in total events from other countries
IftBU 3 . J . General in for mu t. Jon (Continued)
purpose P°>A (Rft) Analysis of plant
availabili ty
- Report to the Reliability authority data for PSfl
Country: L 1 A L Y
Type of Abnormal event Abnormal event i nf orrna L i on i n DB report s r opor L s
TABU 3 1, Genercd information (Continued) Country: JftPAN
Name of the rRhEDOM/CRHX)
Data Base FBK R e l i a b i l i t y Evaluation Data for Operation and Maintenance Centralized Reliability Data Organization
Manotger/ Power Reactor and Nuclear Fuel Development Corporation Operator Oak Ridge National Laboratory (U.S. DOP)
Type of Component information
in DB
Main purpose Collection, storage, maintenance, and evaluation of IMBRs components
Date of slart hRLEDOM (1985) at PNC CREDO (19/8) in the US No. of 21.000 components Monitored
comp,s/unit
Status in operation
No, of records 21.000 components 1. '300 events (end 1987)
Components/ liquid metal reactor specific or related components Event
Types and No. 3 LMFBRs and several test facilities of units
concerned
T A B L E 3.1. General information (Continued) Country: JAPAN
Warne of Lhe The Nuclear Power Safety Information Data Base
Manager/ Nuclear Power Safety Information Research Center Operator
Type of 1. Incidents and failures file information 2. Operation fiJe
in DB 3. Power station data 4. Annual Data
5. Monthly Data
6. Data on individual energy loss 7. Shutdown data
8. Damage data
9. Overseas information
Main purpose 1. Maintenance of nuclear power safety control information.
2. Analysis and evaluation of information on off-normal events
3. Reliability evaluation of plant systems and facilities, 4. Evaluation of the plant characteristics.
"3. Compilation of the pertinent information to be distributed to local municipalities.
Date of start Oct. 1984, but accumulated data for the past 20 years.
No. of n/a Monitored
comp.s/unit
Status in operation No. of records 1000 events (end 1987)
Components/
Event
at present events or off-normal report only
"IABLL 3 , J . Gêner«*] inform» t i on (Continued) Country: REPUBI 1C OF KORFA
Warne of the PUMAS/N Da tot Base
Manager/ Kori no. 1,2 Plant
Operator Nuclear Generation Dept.
Type of ]. Incidents and fai Jures f i l e information ?.. Operation file,
in OB 3. Mater if* J Data 4 . Ou tage Da ta
5. Equipment History Data 6. Event Data
7. efficiency Data
8. Radiation Protection Data Main purpose Management,
Date of start June 86
No. of 10000 components Monitored
comp. sAinit
Status En operation No. of records r>000
(end 1987)
Components/ all important equipment and events Event
Type and No. 2 (PWR) 600 MWe, 1 (CANDU) 600 MWe of units 6 (PWR) 900 MWe
concerned
1 ABI F 3 . 1 , Genen*] information (Continued)
Types & no. of units concerned Conditions of Utilities and CSW use ODB-rules
TABLE-, 3.1, General information (Continued) Country: SWH)t~W
Name of the ATV Data Base
Operator/ Vattenfall Manager
Type of Component failure information
in D8
Main purpose Reliability parameter for PSA
Plant availability Date of start J976
No. of 7600 monitored
comp.s/unit
Status In operation 94263
Wo, of records records
Components/ Components event
Types and No. 12 LWR(PWR-fBWR) of units ? Finnish BWR concerned
T A B L F 3.1. General infornidLion (Continued) Country: VARIOUS
Warne of the Data Base
F RDS - ( If DB LRÜS - AORS
Operator/
Manager
CFIC JRC-T<jpra CFC .IRC-Ispra
Type of Component failure safety significant event information
in DB
Main purpose Reliability parameters PSA
for PSA Backfi tting
Plant availability Design improvement Operational safety Operational safety Maintenance evaluation
Date of start 1984 1984 No, of 600 Not re lovant monitored
comp.s/unit
Status Tn operation Tn operation 5200 comp.s, 30.000 94263 No. of records 4200 fail. events
(end 1987) records (incl. USA I LR)
Components/ mechanical and Plant abnormal events event electro-mechanical
comp,s
Types and Wo. 10 LWR(PWR+I3WR) LWR(PWR<BWR)
fts far a<> t ho component r e l i a b i l i t y datot bases are concerned, a table w i t h tho main information given by tho data banks has been prepared.
T t includes:
tho typo of component <> monitored;
the main ongi noering arid operating characteristics recorded;
tho operating tables (number of demands, operating time's,. ).
The results are presented in Tables 1.7,
The complot ones s of information regarding the engineering characteristics of each component monitored is indicated in the data base,
including-opérât ing conditions;
s i / e ; materials;
manufacturer;
preventive mcdntt'nance (maintenance practice);
pr«'Cciutions and l i m i t s of use.
The operating data included in the tables (i.e exposure time, operating time and /or number of domands), are essential For obtaining correct
r e l i a b i l i t y parameters I h i s informaition can be obtained from evaluation or from observation.
In the first case, it is possible to estimate the operational data on the basis of the plant operation or from tho number of expected periodical tests.
This can load to an underestimation of the exposure times or of the number of demands.
The second case is preferred. Several means can be used to observe directly the operating times and the number of demands; the best being counters installed on actuators, A very efficient solution is to use the
labié 3 ? Main in form«* t. ion Herns p r o v i d e d
Country: K DERAL RFPUBLCC OK (iLRMANY (f-RU)
NAME OF HIE D A 1 A BASH DCURA
Unavaiiabil ity Tirnp Due to Preventive assessed Mai ritenance
Number of Test or Preventive Maintenance outside DE) Acts
labJe 3.? Main information i terns provided (Continued)
Country: FRANCF
NAME OF THF. DATA BASF MROF SRDF A
Types of Components Unavailability Time Due to Preventive not direct
Maintenance
Number of Test or Preventive Maintenance not direct Acts
no
operates permanently yes
not direct
Table 3.2 main information items provided (Continued)
Country: GRHAT URil'AIW NAME OK THE DATA BASE
Plant Reliability/Availability
Unavailability Time Duo to Preventive Maintenance
Number of Test or Preventive Maintenance Acts
y y
(only for some component
Table 3.2 Main information items provided (Continued)
Country: LTflLY
IMME OF fi IE DATA BA^3E SUE GKME
Types of ComporionLs
Uridvöiiläbi 1 ity Time Due to Preventive Maintenance
Number of Tost or Preventive Maintenance Acts
if safety related parts are affected as consequential event ailabié in other plant documentation
Table? 3.2 Main information items provided (Continued) Country: JAPAN
NAME OF fHE DATA BASE R l-1 DOM WSIS
Types of ComponcnLs Pump
Valve Breakers
"I ransformers Hua t F_x changar s Tanks
Unavailability Time Due to Preventive Maintenance
Number of Test or Preventive Maintenance Acts
Table 3.2 Main information items provided (Continued) Country: REPUBLIC OF KOREA
NAME OF HIE DATA BASE PUMAS/W
Types of Components
Uriavailabi lity Time Due to Preventive Maintenance
Number of lest or Preventii/o Maintenance Acts
n n n
Table 3.2 Main information items provided (Continued) Country: SPA CM
NAME OF THE DATA BASH L)ACI\IE--6PC -CKOB Types of Components
Unavailability Time Due to Preventive Maintenance
Number of Test or Preventive Maintenance Acts
observed*
observed, n
*as much as possible
Table 3,2 Main J n for ruction Herns provided (Continued) CounLrv: JMDKAI
NAMtf OF IMF DATA BASE ATV Types of Components
Pump y Value y Breakers y
Transformers y Heat Exchauyers y Tanks y Motors (ele.ctri<) y Turbine y Al ter nator s y Fngine (Diesels) y Batteries _y Bus Bars y L l e c t r o n i L s y Enq . Char 01 r.,
Si?o y Wotturo of M nid y Pressure and 1 emporoiture y Manufotcturer
Periodit.a] Tests Description
No, of Demand s y Opération Time y UridvaJ labi 1 ity lime Due to Preventive y
Maintenance!
Number of lest or Preventive Maintenance y Acts
3.2 Main information items provided (ConLinued)
Unavailability Time Due to Preventive Maintenance
Number of Test or Preventive Maintenance
A c t s
Average values, estimated by operators, will ble given (Future
3.7 Component fai Jure description
In this sertion the be* s i c informât J on necessary for an adequate failure description is listed and commented on. In addition, the special requirements for PBA use are specified.
Table- 3,3 correlates the information collected for failure description and its use, primarily from the point of view of the safety analyst.
Table 3 3, Description of informal ion to be collected and relation to the safety analysis use
FA H URE ION
date of failure detection for studying time to failure date of start of the repair for assessing average Lime
before repair starts
date of restart to operation for assessing actual repair (end of tagging-out of the time
component)
duration of the failed (or duration of the degraded unavailable) state performance or loss of
(from the failure occurrence performance detection until the restart)
for assessing total downtime (unavailability) of component duration of repair gives a useful indication
of technical aspects of repair (useful for maintenance purpose)
manpower for repair, mainly for the optimization radiation exposure of maintenance team activity
Table 3,3 (Continued) FAUUFn Dt SCRIPT LOW cont'd INItRE.Sl
plant status during the unavailability time system status at failure detection (e.g. one train : operation in a two train system, components sharing
effect by which the failure is observed (failure mode in the CFDB classification)
component failure initiation is prompt or gradua] (in the latter case
credit can be given sometimes for emergency intervention)
it is correlated to the
previous (a) and at the same level of importance
Table 3 , 3 , (Continued)
* it starts, but with a certain delay or has a failure mode matrix in accordance with each component of the component involved in
the failure and in repair effect of the comp. failure on the plant; on the system it belongs to or
in some cast's this is not a catastrophic failure and should not be considered as such in emergencies.
important according to the degree of detail of the modelling used in the
analyst understands if it is spontaneous (random) failure (component hardware fault) or caused by misoperation or by external influence.
it is of primary importance for the maintenance aspects
it is of interest mainly for operational safety evaluations, it can provide some useful
rftllURt OF.SCRIP1JLON (cont'd) corrective actions taken or planned (incl. human
factors)
administrative actions taken
number of demands at the time of the failure
number of opérât ing hours at the time of the failure
Free (uncoded) description* in the same plant or similar plants
3 3. (Continued) T W l t R t S l
it describes the repair action and it indicates the need
for modifications
it is also used to verify the adequacy of constant
it is used to verify
the adequacy of a constant failure rate model, to study failure roite time
dependency, component ageing, etc.
it helps the data collector to better describe what occurred, it is useful for the safety analyst who examines and possibly discards some failures from the set
before making the statistics.
3.3 Modes of Data Col lection
Several modes of data collection can be used according to the objectives and the resources available bo the data base manager.
Tables 3.4 indicate the modes of data collection in various Member States. Some options have been included in the list as possible modes despite their present limited use.
Table 3,A Modes of data collection in several Data Bases
Country: FFDE'RAL RKPUBI 1C OF GERMANY (hRG)
DATA BASE DCURA MODES OF DATA COU HM ION
Technician(s) on site in charge of data colJection
Maintenance tech. in addition to their current activities
Operation tech. in addition to their current activities
Automatic Data Collection (plant computers, maint. comp.)
Specialists (PSA analysts) send on site for limited mission
Investigations by questionnaires
Table 3.4 Modes of data collection in several Data Bases (Continued)
Country: FRANCE
DATA BASF SRDF JîRUF A Fvont File
MODUS OF DATA COI IX M TON
Technician(s) on site in charge of data col lection
Maintenance tech. in addition to current activities
Operation tech. in addition to thoir current a c t i v i t i e s
Automatic Data Collection (plant computers, on study l\14 type maint, cornp.) plants Specialists (PSA analysts) send on site for for PÜA
l i m i t e d mission project Investigations by questionnaires
Others (to be specified)
l a b i é 3,4 Modo s of dctta c o l l e c t i o n in sever«*! Dotta ü&ses (Corit i n u e d )
C o u n t r y : B K I Ï A I N
DATA