ML22224A202

Enclosure 2: Changes to Preliminary Safety Analysis Report Chapter 13

ML22224A202
Person / Time
Site:	Hermes
Issue date:	08/12/2022
From:	Kairos Power
To:	Office of Nuclear Reactor Regulation
Shared Package
ML22224A199	List: ML22224A200 ML22224A201 ML22224A202
References
KP-NRC-2208-003
Download: ML22224A202 (1)

Text

Preliminary Safety Analysis Report Accident Analysis Table 13.11: Acceptance Criteria for Figures of Merit Figure of Merit Acceptance Criterion Applicable Events Peak TRISO temperaturetime Generally bounded by temperature Salt Spill, Reactivity time curves derived from the Insertion, Increase in Heat assumed MHA fuel temperature Removal, Loss of Forced time curve Circulation, PHSS break, Seismic, PHX Tube Break Peak TRISO temperature Below incrementalNegligible TRISO Salt Spill, Reactivity timeTRISO failure probability fuel failure temperature probability Insertion, Increase in Heat Removal, Loss of Forced Circulation, PHSS break, PHX Tube Break Peak Flibecover gas interfacial Generally bounded by temperature Salt Spill, Reactivity temperature time curves derived from the Insertion, Increase in Heat assumed MHA Flibecover gas Removal, Loss of Forced interfacial temperaturetime curve Circulation, PHSS break, PHX Tube Break Peak vessel and core barrel Bounded by both the maximum Salt Spill, Reactivity temperatures allowable temperature derived to Insertion, Increase in Heat limit excessive creep deformation Removal, Loss of Forced and damage accumulation and by Circulation, PHSS break, 816°C (highest temperature PHX Tube Break considered by ASME Section III Division 5 for 316H)

Airborne release fraction of Below airborne release fraction Salt Spill, Seismic, PHX spilled/splashed Flibe limit derived to bound total releases Tube Break of the postulated event to less than the MHA Volatile product formation from Negligible amount of additional Salt Spill, PHSS break, PHX Flibeair reaction volatile products formed Tube Break Volatile product formation Negligible amount of additional Salt Spill from Flibe chemical reaction with volatile products formed water, concrete, and/or construction materials (e.g.,

insulation, steel)

Volatile product formation from Negligible amount of additional PHX Tube Break Flibe chemical reaction with volatile products formed nitrate Kairos Power Hermes Reactor 1322 Revision 0