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Abstract

This chapter covers safety topics of the Super LWR. The safety principle is introduced first. The safety system design based on the safety principle is presented. Safety analysis codes for the deterministic approach to the Super LWR safety are introduced. Safety criteria for the integrities of fuel rod and pressure boundary are proposed. Selection, classification, and analyses of the possible abnormal transients and accidents in the Super LWR are presented. There are several key safety characteristics of the Super LWR that are inherent in the design features and their benefits have been identified through systematic safety analyses. A transient subchannel analysis code for the Super LWR is prepared and applied to the flow decreasing events to investigate the influence of cross flow in the fuel assemblies on the safety margin. For the probabilistic approach to the Super LWR safety, simplified level-1 PSA is performed.

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Correspondence to Yoshiaki Oka .

Glossary

ABWR

advanced boiling water reactor

ADS

automatic depressurization system

AFS

auxiliary feedwater system

ATWS

anticipated transient without scram

BDBE

beyond design basis event

BWR

boiling water reactor

CDF

core damage frequency/cumulative damage fraction

ECCS

emergency core cooling system

E/G

emergency diesel generator

FPP

fossil-fired power plant

HEM

homogeneous equilibrium model

LOCA

loss of coolant accident

LOSP

loss of offsite power

LPCI

low pressure core injection

LWR

light water reactor

MSIV

main steam isolation valve

PCMI

pellet cladding mechanical interaction

PCS

power conversion system

PCT

peak cladding temperature

PSA

probabilistic safety assessment

PWR

pressurized water reactor

RCIC

reactor core isolation cooling

RCP

reactor coolant pump

RHR

residual heat removal

ROSP

recovery of offsite power

RPS

reactor protection system

RPV

reactor pressure vessel

SCWR

supercritical pressure water cooled reactor

SG

steam generator

SLCS

standby liquid control system

SRV

safety relief valve

Super LWR

high temperature thermal reactor version of SCWR

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Oka, Y., Koshizuka, S., Ishiwatari, Y., Yamaji, A. (2010). Safety. In: Super Light Water Reactors and Super Fast Reactors. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-6035-1_6

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  • DOI: https://doi.org/10.1007/978-1-4419-6035-1_6

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