Aging study of boiling water reactor high pressure injection systems

Licensee Event Report 87-004 Brukswick Steam Electric Plant Unit 2 Docket No 50-324 March......Page 32
LISTOFTABLES......Page 11
ACKNOWLEDGMENTS......Page 19
ACRONYMS......Page 21
NRC Power Reactor Events High Pressure Coolant Injection System Lockout NUREG/BR-005......Page 22
1.2 Aging Study on the Boiling Water Reactor High Pressure Injection Systems......Page 24
2 BWR HPI SYSTEMS DESCFUPTIONS......Page 25
Emergency core cooling system performance for two worst-case scenarios......Page 27
2.2 High Pressure Coolant Injection System......Page 30
6 Turbine lubrication system......Page 34
2.2.7 Valves......Page 35
2.3.2 JockeyPump......Page 36
4 Typical HPCS system component materials......Page 40
ASME safety class and seismic category classification of major HPI components......Page 41
2.5.3 TurbineTrip......Page 42
Feedwater and Condensate......Page 44
Instrument and Control Air System......Page 45
3.1 PipingandPipeSupports......Page 46
NRC Generic Letter No 84-23 Reactor Vessel Water Level Instrumentation in BWRs October......Page 47
relatedcomponents......Page 49
9 Stressors degradation mechanisms and failure modes for the HPCI pump......Page 50
sparger......Page 51
August 15 1989 Vol 9 No......Page 53
Summary of combined HPCI and HPCS failures from NPE......Page 54
from NPE......Page 55
Summary of detection methods for HPCI and HPCS system failures from LERs......Page 58
23 Summary of HPCI failures from plant-specific data......Page 63
4.6 Time-Dependent Failure Data......Page 64
Component aging fractions in 5-year increments from NPRDS data......Page 68
5.1 HPISystemValves......Page 74
5.2 HPI System Reliability......Page 78
5.3 HPI System Testing......Page 80
5.4 Water Hammer in HPI Systems......Page 81
5.5 Instrumentation and Electrical Issues......Page 82
5.7 HPI Pump Issues......Page 83
5.9 System Initiations......Page 84
6.1 Technical Specification Requirements......Page 86
HPI systems......Page 87
6.4 Maintenance......Page 88
6.5.1 Calibration......Page 89
6.5.2 Testing......Page 90
6.5.4 System Operation......Page 91
Summary of Testing Inspection Surveillance and Maintenance Effectiveness......Page 92
Events and component failures that influence core damage frequency......Page 94
COOLING SYSTEM......Page 99
9.2 NRC Regulatory Guides......Page 101
9.5 IEEE Standards......Page 102
9.6 Equipment Qualification Standards......Page 103
9.7 ASME Operating and Maintenance Standards......Page 104
Code and standard modifications that would improve aging degradation considerations......Page 105
10.1 Improvement of System Reliability......Page 106
10.2 PhaseIIWork......Page 109
REFERENCES......Page 110
NUFEGfCR-5462......Page 10
2 Emergency core cooling system......Page 26
July 31 1989 p......Page 31
Typical high pressure coolant injection system instrumentation locations......Page 38
8 Typical high pressure core spray system flow diagram......Page 39
9 Typical reactor vessel water level points and overall dimensions......Page 43
10 Plant-specific total failures per year......Page 66
HPI system aging fractions from NPRDS data......Page 67
HPI system valve aging fractions from NPRDS aging data......Page 69
inspectionboundary......Page 70
Hours of HPCI system unavailability for corrective maintenance per failure......Page 97
Hours of HPCS system unavailability for corrective maintenance per failure......Page 98
Plant listing identifying class of BWR and type of HPI system......Page 28
J Nelson fiNRC Says Dresden Water Hammer Events Have Generic Implications,fl Inside N.R.C......Page 33
fiPersonnel Errors Are Responsible For 38% Of Maintenance Rework Cases,fl Inside N.R.C......Page 37
valveoperators......Page 48
connections switches transmitters and indicators......Page 52
Summary of HPCI and HPCS failures from LERs......Page 56
Summary of failure causes for HPCI and HPCS systems from LERs......Page 57
Summary of HPCI and HPCS failure causes from NPRDS......Page 60
Summary of detection methods for HPCI and HPCS system failures from NPRDS......Page 62
Results of maintenance request reviews to determine failure causes......Page 65
identified by database analyses......Page 71
NUREGICR-5462......Page 12
29 Summary of common MOV failure mechanisms......Page 77
Recurrent problems in the Browns Ferry HPCI systems......Page 79
31......Page 85
Aging degradation mechanisms and the methods used to detect them......Page 93
35 Risk-significant HPI components......Page 95
NUREGICR-5462......Page 113