Level 3 PSA - EDF Hinkley Point

HPC-NNBOSL-U0-000-RES-000028 Version 1.0
Level 3 PSA
NOT PROTECTIVELY MARKED
N° Initiating Events Ass t
101 Loss of RCV [CVCS] pumping. LowF
102 Double ended primary guillotine break (LOCA - 2A), LowF
103 Multiple steam generator tube rupture (SGTR - 20A) LowF
104 Fuel assembly drop (into reactor building) TBC
105 Fuel assembly mishandling (in reactor building ) LowC
106 Fuelling machine fault leading to dropping of heavy items into the core leading to
clad failure
LowF
107 Fuel element stuck in the fuel transfer mechanism LowC
108 Heavy object dropped into fuel pool LowF
109 Faults associated with spent resin transfer LowC
110 Inadvertent discharge of liquid waste LowC
111 Inadvertent discharge of gaseous waste LowC
112 Dropping of solid waste package LowC
113 Dropping of activated filter LowC
115 Inadvertent operation of the auxiliary feed water system LowC
116 Inadvertent partial cooldown to below 80 bar LowC
118 RCCA Bank misalignment LowC
119 Decay of frequency of off-site power system LowC
120 Faults in sensors common to the control and protection system LowF
121 Loss of spent fuel pool cooling TBC
122 Spent fuel pool drainage TBC
123 Boiling of the spent fuel pool LowC
Assessment:
LowC: event screened out on Low Consequence
LowF: event screened out on Low Frequency
TBC: event to be considered in off-site consequence assessment
UNCONTROLLED WHEN PRINTED
NOT PROTECTIVELY MARKED
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