AP600/1000 Sump: IRWST, RPV, & LOCA Coolant Collection

Thread starter Muti
Start date May 13, 2015

AI Thread Summary

The AP600 (AP1000) design includes an In-Containment Refueling Water Storage Tank (IRWST) situated at the same elevation as the Reactor Pressure Vessel (RPV) hot leg nozzle. This configuration allows the IRWST to effectively collect coolant following a postulated Loss of Coolant Accident (LOCA) from the sump. The referenced document provides detailed insights into the coolant collection process and system functionality. Understanding the IRWST's role is crucial for evaluating the safety and operational efficiency of the AP600/AP1000 reactors. The information clarifies the design's response to emergency scenarios.

May 13, 2015

Muti

AP600 (AP1000) has IRWST inside containment. Bottom elevation of this IRWST is just at height of RPV (hot leg) nozzle. How IRWST collect coolant after postulated LOCA from the sump.

Engineering news on Phys.org

May 14, 2015

Muti

I found the answer, http://www.jsme.or.jp/monograph/pes/1999/ICONE7/PAPERS/TRACK06/FP7220.PDF describes what I wanted.

Last edited by a moderator: May 7, 2017

Thread 'MCNP6 BURN Card Issue: Zero Burnup for Material in Fuel Assembly'

Hello everyone, I am currently working on a burnup calculation for a fuel assembly with repeated geometric structures using MCNP6. I have defined two materials (Material 1 and Material 2) which are actually the same material but located in different positions. However, after running the calculation with the BURN card, I am encountering an issue where all burnup information（power fraction(Initial input is 1,but output file is 0), burnup, mass, etc.） for Material 2 is zero, while Material 1...

View full post »